Series MHZ2/MHZJ2. Parallel Type Air Gripper. Series MHZJ2 with dust cover introduced! New finger options added to Series MHZ2 standard type.

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1 CAT.E273- B Parallel Type Air Gripper Standard Type With Dust Cover Series MHZ2/MHZJ2 Series MHZJ2 with dust cover introduced! New finger options added to Series MHZ2 standard type.

2 Integrated linear guide provide Series MHZ2 Repeatability: ±.1mm Integral guide rail construction Conventional Martensitic stainless steel Finger positions can be selected Standard type (MHQG2 compatible width) Narrow type (MHQ2 compatible width) Linear guide slippage prevention Guide slippage is prevented by 2 positioning pins. MHZJ2 with dust cover is standard type only High degree of mounting flexibility Can be mounted 5 ways from 3 directions. Axial mounting Lateral mounting Vertical mounting Auto switch capable Mounting grooves in 6 locations on sides make it possible to select locations that are easy to see and adjust regardless of mounting orientation. (ø1 in 2 locations) Using body taps Using end boss Using body taps Using body through holes MHZJ2 with dust cover is 2 sides, locations Features 1

3 high rigidity & high accuracy. Mounting accuracy improved Top mounting centering location Mounting is more secure with a depth.5 to 2mm greater than conventional types. Body thickness Improved environmental resistance Sealed construction dust cover Prevents entry of chips, dust, water, etc. Prevents dispersion of grease and external leakage of dust New 3 types of cover material Chloroprene rubber (black): Standard Fluoro rubber (black): Optional Silicon rubber (milk white): Optional Improved remounting accuracy Positioning pin holes are provided. No guide protrusions in direction of body thickness Body thickness tolerance: ±.5 With Dust Cover Series MHZJ2 A clean cover design with no protrusions Internal folding construction does not cause protrusions when opening and closing, thereby preventing interference with other equipment. Series Variations Basic type Side ported Side ported Body options End boss type With One-touch fitting for coaxial tube With One-touch fitting With M5 port Basic type (tapped in open/close direction) Finger options Side tapped Through holes in open/close direction Flat type fingers Additional finger options (MHZ2) Series Cylinder bore (mm) Finger position Action Standard type MHZ Standard type Narrow type Double acting Single acting (normally open) Single acting (normally closed) With dust cover MHZJ Standard type Double acting Single acting (normally open) Single acting (normally closed) Features 2

4 Parallel Type Air Gripper Standard Type Series MHZ2 How to Order Cylinder bore 1 1mm 16 16mm 2 2mm 25 25mm Number of fingers 2 2 fingers D S C MHZ2 16 D Action Double acting Single acting (normally open) Single acting (normally closed) Finger position/option F9PV Number of auto switches Nil 2 pcs. S 1 pc. Auto switch type Nil Without auto switch (built-in magnet) Select an applicable auto switch model from the table below. Body option Nil: Standard type (MHQG2 compatible type) Nil: Basic type N: Narrow type (MHQ2 compatible type) N: Basic type Nil: Basic type E: End boss type Side ported (double acting/single acting) W: End boss type Axial port with One-touch fitting for coaxial tube (double acting) 1: Side tap mounting N1: Side tap mounting Port Port Port 2: Through holes in open/close direction N2: Through holes in open/close direction Port Port 3: Flat finger type K: End boss type Axial port with One-touch fitting (single acting) M: End boss type Axial M5 port (single acting) The flat finger type does not have standard and narrow type options. In case MHQG2/MHQ2 compatible types are required, see the X51 order made specifications on page 32. Applicable auto switch models/ Refer to pages 2 through 3 for detailed auto switch specifications. Type Special function Load voltage Lead wire length Auto switch part no. Electrical (m) Applicable model Indicator Wiring Electrical entry direction Applicable load entry light (output) DC AC.5 3 ø1 ø16 ø2 ø25 Perpendicular In-line (Nil) (L) 5V, 12V Y69A Y59A IC circuit 3 wire (NPN) 12V F9NV F9N 3 wire (PNP) 5V, 12V Y7PV Y7P IC circuit 12V F9PV F9P 2 wire 12V Y69B Y59B F9BV F9B Relay, Grommet Yes 2V 5V, 12V Y7NWV Y7NW IC circuit PLC 3 wire (NPN) 12V F9NWV F9NW Diagnostic 5V, 12V Y7PWV Y7PW IC circuit indication 3 wire (PNP) (2 color indicator) F9PWV F9PW 2 wire 12V Y7BWV Y7BW F9BWV F9BW Lead wire length symbols:.5m... Nil (Example) F9N 3m... L (Example) F9NL Note 1) Use caution regarding hysteresis in the 2 color indicator type. When using this type, refer to Auto Switch Hysteresis on page 26 Solid state switch 1

5 Parallel Type/Standard Type Series MHZ2 Specifications Fluid Air Operating pressure Double acting Single acting Normally open Normally closed ø1:.2 to.7 MPa ø16 to ø25:.1 to.7mpa ø1:.35 to.7mpa ø16 to ø25:.25 to.7mpa Ambient and fluid temperature 1 to 6 Repeatability ±.1mm Maximum operating frequency 18 c.p.m. Lubrication Non-lube Action Double acting, Single acting Auto switch (option) Note) Solid state switch (3wire, 2wire) Note) Refer to pages 2 to 3 for details regarding auto switch specifications. s Symbols Double acting type Single acting type, normally open Single acting type, normally closed Action Double acting Single acting Normally closed Normally open Options MHZ2-1D (N) MHZ2-16D (N) MHZ2-2D (N) MHZ2-25D (N) MHZ2-1S (N) MHZ2-16S (N) MHZ2-2S (N) MHZ2-25S (N) MHZ2-1C (N) MHZ2-16C (N) MHZ2-2C (N) MHZ2-25C (N) Cylinder bore (mm) Gripping force Note 1) Closing Gripping force per finger Effective value N External gripping force Internal gripping force Note 1) Values for pressure of.5mpa, gripping point L= 2mm, at center of stroke. Note 2) Values excluding weight of auto switch stroke (both sides) mm Note 2) Weight g Body options/end boss type Type of piping port Applicable model Piping port position MHZ2-1 MHZ2-16 MHZ2-2 MHZ2-25 Double acting Single acting Side ported M3 x.5 M5 x.8 Axial port With coaxial tube fitting With One-touch fitting M5 x.8 For detailed body option specifications, refer to option specifications on pages 9 and 1. 2

6 Series MHZ2 Construction Double acting/with fingers open Single acting/normally open Single acting/normally closed Double acting/with fingers closed Parts list Parts list No. Description Material Note No. Description 1 Body Aluminum alloy Hard anodized 11 Steel balls 2 Piston ø1, ø16: Stainless steel ø2, ø25: 12 Needle roller ø2, ø25: Aluminum alloy Hard anodized 13 Parallel pin 3 Lever Stainless steel Heat treated 1 C type snap ring Guide Stainless steel Heat treated 15 Exhaust plug A 5 Finger Stainless steel Heat treated 16 Exhaust filter A 6 Roller stopper Stainless steel 17 N.O. spring 7 Lever shaft Stainless steel Nitrided 18 N.C. spring 8 Cap Synthetic resin 19 Rod seal 9 Damper Polyurethane rubber 2 Piston seal 1 Rubber magnet Synthetic rubber 21 Gasket Material High carbon chrome bearing steel High carbon chrome bearing steel Stainless steel Carbon steel Brass Polyvinyl formal Stainless steel spring wire Stainless steel spring wire NBR NBR NBR Note Nickel plated Electroless nickel plated Replacement parts: Seal kits Seal kit No. Description MHZ2-1D MHZ2-16D MHZ2-2D MHZ2-25D MHZ1-PS MHZ16-PS MHZ2-PS MHZ25-PS Kits include items 19, 2 and 21 from the table above Seal kits consist of items 19, 2 and 21 contained in one kit, and can be ordered using the seal kit number for each cylinder bore size. 3

7 Parallel Type/Standard Type Series MHZ2 Dimensions MHZ2-1 Scale: 9% M3 x.5 thread depth 6 (mounting thread) +.25 ø2h9 depth M3 x.5 thread depth 5.5 (mounting thread) Prepared hole dia. 2.6 through (mounting hole) Note) 5.2 ± ± When open M3 x.5 thread depth 6 (mounting thread) +.3 ø11h9 depth ±.5 -M2.5 x.5 (attachment mounting thread) M3 x.5 (finger closing port) M3 x.5 (finger opening port) When closed In the case of single action, the port on one side is a breathing hole. Auto switch mounting groove dimensions Auto switch mounting groove Finger position/narrow type MHZ2-1 N When open When closed 5.7 Note) When using D-Y59, D-Y69 and D-Y7 type auto switches, through hole mounting is not possible.

8 Series MHZ2 Dimensions MHZ2-16 Scale: 65% 3 -M x.7 thread depth 8 (mounting thread) Prepared hole dia. 3. through (mounting hole) Note) M x.7 thread depth.5 (mounting thread) +.25 ø3h9 depth ± When open When closed ± M x.7 thread depth 8 (mounting thread) +.3 ø17h9 depth ±.5 -M3 x.5 (attachment mounting thread) M5 x.8 (finger closing port) M5 x.8 (finger opening port) 13 Auto switch mounting groove dimensions Auto switch mounting groove (for D-Y) In the case of single action, the port on one side is a breathing hole. ø Finger position/narrow type MHZ2-16 N 2.1 Auto switch mounting groove (for D-F) +2.2 When open When closed 6.6 Note) When using D-Y59, D-Y69 and D-Y7 type auto switches, through hole mounting is not possible. 5

9 Parallel Type/Standard Type Series MHZ2 MHZ2-2 Scale: 6% M5 x.8 thread depth 8 (mounting thread) -M5 x.8 thread depth 1 (mounting thread) Prepared hole dia..3 through (mounting hole) Note) +.3 øh9 depth 7.5 ± When open When closed ±.2 2-M5 x.8 thread depth 1 (mounting thread) +.52 ø21h9 depth ±.5 M5 x.8 -M x.7 (attachment mounting thread) (finger closing port) M5 x.8 (finger opening port) In the case of single action, the port on one side is a breathing hole ø Auto switch mounting groove dimensions Auto switch mounting groove (for D-Y) Finger position/narrow type 9 MHZ2-2 N 1 Auto switch mounting groove (for D-F) +2.2 When open When closed Note) When using D-Y59, D-Y69 and D-Y7 type auto switches, through hole mounting is not possible. 6

10 Series MHZ2 Dimensions MHZ2-25 Scale: 5% M6 x 1 thread depth 1 (mounting thread) -M6 x 1 thread depth 12 (mounting thread) +.3 øh9 depth When open When closed 19.3 Prepared hole dia. 5.1 through (mounting hole) Note) 1 ± ± M6 x 1 thread depth 12 (mounting thread) ø26h9 depth ±.5 -M5 x.8 (attachment mounting thread) M5 x.8 (finger closing port) M5 x.8 (finger opening port) In the case of single action, the port on one side is a breathing hole ø Auto switch mounting groove dimensions Auto switch mounting groove (for D-Y) Finger position/narrow type MHZ2-25 N Auto switch mounting groove (for D-F) When open When closed 8.8 Note) When using D-Y59, D-Y69 and D-Y7 type auto switches, through hole mounting is not possible. 7

11 Standard Type/Series MHZ2 Finger Position/Options Side Tap Mounting Type [1 N1] -MM Attachment mounting thread Through Hole in Opening/Closing Direction [2 N2] A B S -H Attachment mounting hole Flat Finger Type [3] A B -MM thread depth L Attachment mounting thread J J K B D K G D F C O W S B A A C S C 1 MHZ2-1 N1 1 MHZ2-16 N1 1 MHZ2-2 N1 1 MHZ2-25 N1 A O O B C Unit: mm MM M2.5 x.5 M3 x.5 M x.7 M5 x.8 Specifications and dimensions other than the above are the same as the basic type (including narrow type). MHZ2-1 MHZ2-16 MHZ2-2 MHZ N2 2 N2 2 N2 2 N2 A B Unit: mm H Specifications and dimensions other than the above are the same as the basic type (including narrow type). Unit: mm MHZ2-13 MHZ2-163 MHZ2-23 MHZ2-253 A B C D F G Open Closed J K H H H H9 Note 1) Specifications and dimensions other than the above are the same as the basic type (including narrow type). Note 2) The overall length is the same as the MHQ(G) flat finger type MM M2.5 x.5 M3 x.5 M x.7 M5 x.8 L W Weight g

12 Applicable s Standard Type/Series MHZ2 Body Options: End Boss Type Symbol E W K M Configuration Side ported Axial port MHZ2-1 Type of piping port Applicable model Single acting MHZ2-16 MHZ2-2 MHZ2-25 Double acting Normally open M3 x.5 M5 x.8 With One-touch fitting for coaxial tube With one-touch fitting M5 x.8 Normally closed Side Ported [E] Auto switch mounting groove ( locations) (except ø1) End boss assembly D1 D2 E 5 B A Auto switch mounting groove (both sides) Refer to the dimension table. When auto switches are used, side mounting with through holes is not possible. Axial Port (One-Touch Fitting for Coaxial Tube) [W] Auto switch mounting groove ( locations) (except ø1) Applicable coaxial tube End boss assembly E ød2 5 B A Max. 5 Refer to the dimension table. When auto switches are used, side mounting with through holes is not possible. ød1 Auto switch mounting groove (both sides) Applicable coaxial tubing Specifications Outside diameter Max. operating pressure Min. bend radius Operating temperature Material TWB-2 mm.6mpa 1mm 2 to 6 C Nylon 12 Changing from Coaxial to Single Tubing Branch tee, Different dia. tee, Branch "Y", Male run tee Changing to single tubing is possible by using a branch "Y" or branch tee fitting. In this case particularly, single tube fittings and tubing for ø 2 and 3 will be necessary. 9

13 Parallel Type/Standard Type Series MHZ2 Axial Port (with One-Touch Fitting) [K] E Auto switch mounting groove ( locations) (except ø1) Applicable tube End boss assembly ød2 5 B A ød1 Max. 5 Auto switch mounting groove (both sides) Refer to the dimension table. When auto switches are used, side mounting with through holes is not possible. Applicable tubing Description Specifications Outside diameter mm Max. operating pressure MPa Min. bend radius mm Operating temperature C Material Nylon tubing Soft nylon tubing Polyurethane Polyurethane tubing coiled tubing T25 TS25 TU25 TCU25B to 6 Nylon to 6 Nylon to 6 Polyurethane.5 2 to 6 Polyurethane Refer to SMC's catalog CAT. 51-B "Air Fittings and Tubing" regarding One-touch fittings and tubing. Axial Port (with M5 Port) [M] Auto switch mounting groove ( locations) (except ø1) M5 x.8 Piping port End boss assembly ød1 ød2 5 B E A Auto switch mounting groove (both sides) Refer to the dimension table. When auto switches are used, side mounting with through holes is not possible. Dimension table MHZ2-1 A 15 B 7 D1 12f Unit: mm D2 E MHZ f MHZ f MHZ f Other dimensions and specifications correspond to the standard type Weight table Unit: g MHZ2-1 MHZ2-16 MHZ2-2 MHZ2-25 E W End boss type (symbol) K M

14 Parallel Type Air Gripper With Dust Cover Series MHZJ2 How to Order Cylinder bore mm 16mm 2mm 25mm MHZJ2 16 D F9PV Number of fingers 2 2 fingers D S C Action Double acting Single acting (normally open) Single acting (normally closed) Number of auto switches Nil S Auto switch type 2 pcs. 1 pc. Without auto switch Nil (built-in magnet) Select an applicable auto switch model from the table below. Nil: Basic type Body option E: End boss type W: End boss type Side ported (double Axial port with Onetouch fitting for Port Port acting/single acting) coaxial tube (double acting) Dust cover type Nil F S Chloroprene rubber (CR) Fluoro rubber (FKM) Silicon rubber (Si) Port Port Port K: End boss type Axial port with One-touch fitting (single acting) M: End boss type Axial M5 port (single acting) Applicable auto switch models/ Type Solid state switch Special function Diagnostic indication (2 color indicator) Improved water resistance (2 color indicator) Electrical entry Grommet Indicator light Yes Switch types D-Y5/6 and D-Y7 cannot be mounted when equipped with dust cover/mhzj2. Refer to pages 2 through 3 for detailed auto switch specifications. Wiring (output) 3wire (NPN) 3wire (PNP) 2wire 3wire (NPN) 3wire (PNP) 2wire 2V Load voltage DC 12V AC Auto switch part no. Lead wire length (m) Electrical entry direction.5 3 Perpendicular In-line (Nil) (L) F9NV F9N F9PV F9P F9BV F9B F9NWV F9NW F9PWV F9PW F9BWV F9BW F9BA Lead wire length symbols:.5m... Nil (Example) F9N 3m... L (Example) F9NL Note 1) Use caution regarding hysteresis in the 2 color indicator type. When using this type, refer to Auto Switch Hysteresis on page 26. Applicable load Relay, PLC ø1 ø16 ø2 ø25 Applicable model 11

15 Parallel Type/With Dust Cover Series MHZJ2 Specifications Fluid Air Operating pressure Double acting Single acting Normally open Normally closed ø1:.2 to.7 MPa ø16 to ø25:.1 to.7mpa ø1:.35 to.7mpa ø16 to ø25:.25 to.7mpa Ambient and fluid temperature 1 to 6 Repeatability ±.1mm Maximum operating frequency 18 c.p.m. Lubrication Non-lube Action Double acting, Single acting Auto switch (option) Note) Solid state switch (3wire, 2wire) Note) Refer to pages 2 to 3 for details regarding auto switch specifications. s Symbols Double acting type Single acting type, normally open Single acting type, normally closed Action Double acting Single acting Normally closed Normally open Options MHZJ2-1D MHZJ2-16D MHZJ2-2D MHZJ2-25D MHZJ2-1S MHZJ2-16S MHZJ2-2S MHZJ2-25S MHZJ2-1C MHZJ2-16C MHZJ2-2C MHZJ2-25C Cylinder bore (mm) Gripping force Note 1) Closing Gripping force per finger Effective value N External gripping force Internal gripping force Note 1) Values for pressure of.5mpa, gripping point L= 2mm, at center of stroke. Note 2) Values excluding weight of auto switch stroke (both sides) mm Note 2) Weight g Body options/end boss type Type of piping port Applicable model Piping port position MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 Double acting Single acting Side ported M3 x.5 M5 x.8 Axial port With coaxial tube fitting With One-touch fitting M5 x.8 For detailed body option specifications, refer to option specifications on pages 18 and

16 Series MHZJ2 Construction Double acting/with fingers open Single acting/normally open Double acting/normally closed Double acting/with fingers closed Parts list No. Description 1 Body Piston Lever Guide Finger Roller stopper Lever shaft Cap Damper Rubber magnet Steel balls Needle roller Parallel pin C type snap ring Exhaust plug A Exhaust filter A N.O. spring N.C. spring Rod seal Piston seal Gasket 22 Dust cover Material Note Aluminum alloy Hard anodized ø1, ø16 stainless steel ø2, ø25: ø2, ø25 Aluminum alloy Hard anodized Stainless steel Heat treated Stainless steel Heat treated Stainless steel Heat treated Stainless steel Stainless steel Nitrided Aluminum alloy Hard anodized Polyurethane rubber Synthetic rubber High carbon chromium bearing steel High carbon chromium bearing steel Stainless steel Carbon steel Nickel plated Brass Electroless nickel plated Polyvinyl formal Stainless steel spring wire Stainless steel spring wire NBR NBR NBR CR Note 1) FKM Note 1) Si Note 1) Note 1) CR: Chloroprene rubber, FKM: Fluoro rubber, Si: Silicon rubber Replacement parts: Seal kits Seal kit No. Description Note) MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 Kits include items 19, 2. MHZJ1-PS MHZJ16-PS MHZJ2-PS MHZJ25-PS and 21 from the table on the left Seal kits consist of items 19, 2 and 21 contained in one kit, and can be ordered using the seal kit number for each cylinder bore size. Replacement parts/dust cover Material Part No. MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 CR MHZJ2-J1 MHZJ2-J16 MHZJ2-J2 MHZJ2-J25 FKM MHZJ2-J1F MHZJ2-J16F MHZJ2-J2F MHZJ2-J25F Si MHZJ2-J1S MHZJ2-J16S MHZJ2-J2S MHZJ2-J25S 13

17 ø Parallel Type/With Dust Cover Series MHZJ2 Dimensions MHZJ2-1 Scale: 9% ±.5 (21) 2-M3 x.5 thread depth 6 (mounting thread) -M3 x.5 thread depth 5.5 (mounting thread) Prepared hole dia. 2.6 through (mounting hole) Note) +.25 ø2h9 depth ±.2 (3) When open When closed ±.2 2-M3 x.5 thread depth 6 (mounting thread) +.3 ø11h9 depth M2.5 x.5 (attachment mounting thread) M3 x.5 (finger closing port) M3 x.5 (finger opening port) Auto switch mounting groove dimensions Auto switch mounting groove (both sides) In the case of single action, the port on one side is a breathing hole. Note) When using auto switches, through hole mounting is not possible. 1

18 Series MHZJ2 Dimensions MHZJ2-16 Scale: 6% ± ± (5) (29.6) 16 2-M x.7 thread depth.5 (mounting thread) -M x.7 thread depth 8 (mounting thread) Prepared hole dia. 3. through (mounting hole) ø3h depth 3 When open When closed ø17h9 depth ± M x.7 thread depth 8 (mounting thread) -M3 x.5 (attachment mounting thread) M5 x.8 (finger closing port) M5 x.8 (finger opening port) Auto switch mounting groove dimensions Auto switch mounting groove (both sides) ø In the case of single action, the port on one side is a breathing hole. 15

19 Parallel Type/With Dust Cover Series MHZJ2 MHZJ2-2 Scale: 6% ±.5 7.5± When closed M x.7 (attachment mounting thread) ø 23 1 (3.6) 2-M5 x.8 thread depth 8 (mounting thread) -M5 x.8 thread depth 1 (mounting thread) Prepared hole dia..3 through (mounting hole) +.3 øh9 depth 16.8 ±.2 (58) When open 26.3 M5 x.8 (finger closing port) M5 x.8 (finger opening port) 2-M5 x.8 thread depth 1 (mounting thread) +.52 ø21h9 depth 3 Auto switch mounting groove dimensions Auto switch mounting groove (both sides) In the case of single action, the port on one side is a breathing hole

20 Series MHZJ2 Dimensions MHZJ2-25 Scale: 5% 36.5 ± ± (73) 52 (2) M6 x 1 thread depth 1 (mounting thread) -M6 x 1 thread depth 12 (mounting thread) Prepared hole dia. 5.1 through (mounting hole) +.3 øh9 depth When open When closed ø26h depth ø ±.2 -M5 x.8 (attachment mounting thread) M5 x.8 (finger closing port) M5 x.8 (finger opening port) 2-M6 x 1 thread depth 12 (mounting thread) Auto switch mounting groove dimensions Auto switch mounting groove (both sides) In the case of single action, the port on one side is a breathing hole

21 Applicable s With Dust Cover/Series MHZJ2 Body Options: End Boss Type Symbol E W K M Configuration Side ported Axial port MHZJ2-1 M3 Type of piping port Applicable model Single acting MHZJ2-16 MHZJ2-2 MHZJ2-25 Double acting Normally open Normally closed M5 With One-touch fitting for coaxial tube With One-touch fitting M5 Side Ported [E] End boss assembly ød2 Auto switch mounting groove ( locations) (Except ø1) ød1 5 B E A Auto switch mounting groove (both sides) Refer to the dimension table. (ø1 only) When auto switches are used on ø1, side mounting with through holes is not possible. Axial Port (One-Touch Fitting for Coaxial Tube) [W] Applicable coaxial tube End boss assembly Auto switch mounting groove ( locations) (Except ø1) ød2 E 5 B Refer to the dimension table. When auto switches are used on ø1, side mounting with through holes is not possible. A ød1 Max.5 Auto switch mounting groove (both sides) (ø1 only) Applicable coaxial tubing Specifications Outside diameter Max. operating pressure Min. bend radius Operating temperature Material TWB-2 mm.6mpa 1mm 2 to 6 C Nylon 12 Changing from Coaxial to Single Tubing Branch tee, Different dia. tee, Branch "Y", Male run tee Changing to single tubing is possible by using a branch "Y" or branch tee fitting. In this case particularly, single tube fittings and tubing for ø2 and 3 will be necessary. 18

22 With Dust Cover/Series MHZJ2 Body Options: End Boss Type Axial Port (with One-Touch Fitting) [K] Axial Port (with M5 Port) [M] E Applicable coaxial tube End boss assembly A B Max. 5 Auto switch mounting groove ( locations) (except ø1) Auto switch mounting groove (both sides) (ø1 only) Refer to the dimension table. When auto switches are used on ø1, side mounting with the through holes is not possible. ød2 5 ød1 Applicable tubing Description Specifications Outside diameter mm Max. operating pressure MPa Min. bend radius mm Operating temperature C Material Nylon tubing T to 6 Nylon 12 Soft nylon tubing TS to 6 Nylon 12 Polyurethane Polyurethane tubing coiled tubing TU to 6 TCU25B-1 Polyurethane Polyurethane.5 2 to 6 Refer to SMC's catalog CAT. 51-B "Air Fittings and Tubing" regarding One-touch fittings and tubing. End boss assembly ød2 Auto switch mounting groove ( locations) (except ø1) ød1 E 5 B A M5 x.8 piping port Auto switch mounting groove ( locations) (ø1 only) Refer to the dimension table. When auto switches are used on ø1, side mounting with the through holes is not possible. Dimension table MHZJ2-1 A 15 B 7 D1 12f Unit: mm D2 E 11 MHZJ f MHZJ f MHZJ Other dimensions and specifications are the same as the standard type f Weight table Unit: g MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 E W End boss type (symbol) K M

23 Series MHZ2/MHZJ2 Auto Switch Common Specifications Auto Switch Common Specifications Type Operating time Impact resistance Insulation resistance Withstand voltage Ambient temperature Enclosure Solid state switch 1ms or less 1m/s² 5MΩ or more at 5VDC (between lead wire and case) 1VAC for 1min. (between lead wire and case) 1 to 6 C IEC529 standard IP67, JISC92 watertight construction Lead Wire Length Indication of lead wire length (Example) D-F9P L Lead wire length Nil L Z.5m 3m 5m Lead Wire Color Changes Lead wire colors of SMC auto switches have been changed in order to meet standard IEC for production beginning September, 1996 and thereafter, as shown in the tables below. Take special care regarding wire polarity during the time that the old colors still coexist with the new colors. 2 wire 3 wire Output (+) Output ( ) Old Red New Power supply (+) Power supply GND Old Red New Output White Note 1) Lead wire length Z: Auto switch with 5m length Solid state: All models produced upon receipt of order (standard procedure). Note 2) The standard lead wire length is 3m for water resistant 2 color indicator solid state switches. (.5m is not available.) Note 3) For solid state with flexible wire specifications, enter 61 after the lead wire length. (Example) D-F9PL- 61 Flexible specifications Solid state with diagnostic output Power supply (+) Power supply GND Old Red New Output White Diagnostic output Yellow Orange Solid state with latch type diagnostic output Power supply (+) Power supply GND Old Red New Output White Latch type diagnostic output Yellow Orange 2

24 Grommet Auto switch internal circuits Lead wire colors inside [ ] are those prior to conformity with IEC standards. D-Y59A, D-Y69A Main switch circuit Solid State Switches/Direct Mounting Type A A D-Y59 B, D-Y69 B, D-Y7P(V) DC (+) OUT [White] Auto Switch Specifications D-Y5, D-Y6, D-Y7P, D-Y7PV (with indicator light) Auto switch part no. Electrical entry direction D-Y59A In-line D-Y69A Perpendicular D-Y7P In-line D-Y7PV Perpendicular Wiring Output Applicable load Power supply voltage Current consumption Load voltage Load current Internal voltage drop Leakage current Indicator light Auto Switch Weight Table Lead wire length.5m Lead wire length 3m D-Y59B In-line D-Y69B Perpendicular 3 wire 2 wire NPN type PNP type IC circuit, Relay, PLC 2VDC relay, PLC 5, 12, 2VDC (.5 to 28VDC) 1mA or less 28VDC or less 2VDC (1 to 28VDC) ma or less 8mA or less 5 to ma 1.5V or less (.8V or less at a load current of 1mA).8V or less V or less 1µA or less at 2VDC.8mA or less at 2VDC Red LED lights up when ON Lead wiresheavy duty oil resistant flexible vinyl cord, ø3.,.15mm², 3 wire (,, [Red, White, ]), 2 wire (, [Red, ]),.5m Note 1) Refer to page 2 for solid state switch common specifications. Note 2) Refer to page 2 for lead wire length. D-Y59A/Y69A 1 53 D-Y59B/Y69B 9 5 Unit: g D-Y7P/Y7PV 1 53 D-Y7P (V) Main switch circuit DC ( ) DC (+) OUT [White] DC ( ) Auto Switch Dimensions D-Y59A, D-Y7P, D-Y59B D-Y59B, D-Y69B Main switch circuit OUT (+) D-Y69A, D-Y7PV, D-Y69B OUT ( ) 21

25 Solid State Switches/Direct Mounting Type D-F9N(V), D-F9P(V), D-F9B(V) D-F9N(V) Grommet Auto switch internal circuits Lead wire colors inside [ ] are those prior to conformity with IEC standards. Auto Switch Specifications D-F9, D-F9V (with indicator light) Auto switch part no. D-F9N D-F9NV D-F9P Electrical entry direction In-line Perpendicular In-line D-F9PV Perpendicular D-F9B In-line D-F9BV Perpendicular Wiring 3 wire 2 wire Output NPN type PNP type Applicable load Power supply voltage Current consumption IC circuit, Relay, PLC 5, 12, 2VDC (.5 to 28VDC) 1mA or less 2VDC relay, PLC Load voltage Load current 28VDC or less ma or less 1.5V or less 8mA or less 2VDC (1 to 28VDC) 5 to ma Internal voltage drop (.8V or less at a load current of 1mA).8V or less V or less Leakage current 1µA or less at 2VDC.8mA or less Indicator light Red LED lights up when ON Lead wiresheavy duty oil resistant vinyl cord, ø2.7, 3 wire (,, [Red, White, ]),.15mm², 2 wire (, [Red, ]),.18mm²,.5m Note 1) Refer to page 2 for solid state switch common specifications. Note 2) Refer to page 2 for lead wire length. Auto Switch Weight Table DC (+) D-F9N D-F9P D-F9B D-F9NV D-F9PV Unit: g D-F9BV Main switch circuit OUT [White] Lead wire length.5m Lead wire length 3m D-F9P(V) DC ( ) Auto Switch Dimensions D-F9N, D-F9P, D-F9B Main switch circuit DC (+) OUT [White] DC ( ) D-F9B(V) OUT (+) D-F9NV, D-F9PV, D-F9BV Main switch circuit OUT ( ) 22

26 Grommet The optimum operating position can be determined by the color of the light. (Red Green Red) D-Y7NW(V) Main switch circuit D-Y7PW(V) Main switch circuit 2 Color Indicator Type Solid State Switches /Direct Mounting Type D-Y7NW(V), DY7PW(V), D-Y7BW(V) Auto switch internal circuits Lead wire colors inside [ ] are those prior to conformity with IEC standards. DC (+) OUT [White] DC ( ) DC (+) OUT [White] DC ( ) Auto Switch Specifications D-Y7W, D-Y7WV (with indicator light) Auto switch part no. Electrical entry direction D-Y7NW In-line D-Y7NWV Perpendicular D-Y7PW In-line Wiring Output Applicable load Power supply voltage Current consumption Load voltage Load current Internal voltage drop Leakage current Indicator light Auto Switch Weight Table Lead wire length.5m Lead wire length 3m Auto Switch Dimensions D-Y7W D-Y7PWV D-Y7BW D-Y7BWV Perpendicular In-line Perpendicular 3 wire 2 wire NPN type PNP type IC circuit, Relay, PLC 5, 12, 2VDC (.5 to 28VDC) 1mA or less 2VDC relay, PLC 28VDC or less 2VDC (1 to 28VDC) ma or less 8mA or less 5 to ma 1.5V or less (.8V or less at a load current of 1mA).8V or less V or less 1µA or less at 2VDC.8mA or less at 2VDC Operating position... Red LED lights up Optimum operating position... Green LED lights up Lead wiresheavy duty oil resistant flexible vinyl cord, ø3.,.15mm², 3 wire (,, [Red, White, ]), 2 wire (, [Red, ]),.5m Note 1) Refer to page 2 for solid state switch common specifications. Note 2) Refer to page 2 for lead wire length. D-Y7NW 11 5 D-Y7PW 11 5 Unit: g D-Y7BW 11 5 D-Y7BW(V) Main switch circuit OUT (+) D-Y7WV OUT ( ) Indicator light/display method 23

27 D-F9NW(V) Main switch circuit 2 Color Indicator Type Solid State Switches /Direct Mounting Type D-F9NW(V), D-F9PW(V), D-F9BW(V) Grommet Auto switch internal circuits Lead wire colors inside [ ] are those prior to conformity with IEC standards. DC (+) OUT [White] Auto Switch Specifications D-F9W, D-F9 WV (with indicator light) Auto switch part no. Auto Switch Weight Table Lead wire length.5m Lead wire length 3m D-F9NW 7 3 D-F9NWV Electrical entry direction In-line Perpendicular In-line Perpendicular Wiring 3 wire Output NPN type PNP type Applicable load IC circuit, Relay, PLC Power supply voltage 5, 12, 2VDC (.5 to 28VDC) Current consumption 1mA or less Load voltage 28VDC or less Load current.ma or less 8mA or less Internal voltage drop 1.5V or less (.8V or less at a load current of 1mA).8V or less Leakage current 1µA or less at 2VDC Indicator light D-F9NW D-F9NWV 7 3 D-F9PW D-F9PW 7 3 D-F9PWV D-F9PWV 7 3 D-F9BW In-line Operating position... Red LED lights up Optimum operating position... Green LED lights up D-F9BW 7 32 D-F9BWV Perpendicular 2 wire 2VDC relay, PLC 2VDC (1 to 28VDC) 5 to ma V or less.8ma or less Lead wiresheavy duty oil resistant vinyl cord, ø2.7, 3 wire (,, [Red, White, ]),.15mm², 2 wire (, [Red, ]),.18mm²,.5m Note 1) Refer to page 2 for solid state switch common specifications. Note 2) Refer to page 2 for lead wire length. Unit: g D-F9BWV 7 32 D-F9PW(V) Main switch circuit DC ( ) DC (+) OUT [White] Auto Switch Dimensions D-F9NW, D-F9PW, D-F9BW DC ( ) D-F9BW(V) Main switch circuit OUT (+) D-F9NWV, D-F9PWV, D-F9BWV OUT ( ) Indicator light/display method 2

28 Water Resistant 2 Color Indicator Type Solid State Switches/Direct Mounting Type D-F9BAL Grommet Improved water (coolant) resistant type Caution Precautions on Useage Contact SMC if solutions other than water will be used. Auto switch internal circuits Lead wire colors inside [ ] are those prior to conformity with IEC standards. Main switch circuit OUT (+) Auto Switch Specifications D-F9BAL (with indicator light) Auto switch part no. D-F9BAL Wiring 2 wire Output Applicable load 2VDC relay, PLC Power supply voltage Current consumption Load voltage 2VDC (1 to 28VDC) Load current 5 to 3mA Internal voltage drop 5V or less Leakage current 1mA or less at 2VDC Operating position... Red LED lights up Indicator light Optimum operating position... Green LED lights up Lead wiresheavy duty oil resistant vinyl cord, ø2.7, 2 wire (, [Red, ]),.18mm²,.5m Note 1) Refer to page 2 for solid state switch common specifications. Note 2) Refer to page 2 for lead wire length. Auto Switch Weight table Lead wire length 3m D-F9BAL 37 Auto Switch Dimensions Unit: g OUT ( ) Indicator light/display method 25

29 Series MHZ2/MHZJ2 Auto Switch Hysteresis Auto switches have hysteresis similar to micro switches. The adjustment of switch positions should be performed using the table below as a standard. Hysteresis Switch operating position (ON) Switch return position (OFF) Hysteresis Switch return position (ON) Switch return position (OFF) Auto switch MHZ2-1 MHZ2-16 MHZ2-2 MHZ2-25 MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 D-Y59 A B A D-Y69 B D-F9 (V) D-Y7P (V) Note) Auto switches are not applicable to blank sections in the table. Mounting of Auto Switches ON position set when red light is turned on.5.5 ON position set when green light is turned on When attaching an auto switch, insert it into one of the air gripper's switch mounting grooves from the direction shown in the figure below. After setting in the desired mounting position, tighten the switch mounting screw, which is included, using a flat head watch makers screw driver. Maximum hysteresis (mm) D-Y7W (V) D-F9W (V) D-F9BAL 1 1 ON position set when red light is turned on ON position set when green light is turned on ON position set when red light is turned on.... ON position set when green light is turned on Flat head watch makers screw driver ø5 to ø6 Switch mounting screw M2.5 x Auto switch Note) When tightening the auto switch mounting screw, use a watchmakers screw driver with a handle diameter of about 5 to 6mm. The tightening torque should be about.5 to.1n m. As a rule, it should be turned about 9 beyond the point at which tightening can be felt. 26

30 Series MHZ2/MHZJ2 Amount of Auto Switch Protrusion from the Body End Surface The amount of auto switch protrusion from the body's end surface is as shown in the table below. Use this as a standard when mounting, etc. Standard body Lead wire type In-line Perpendicular Explanatory drawing Auto switch L L L MHZ2-1 MHZ2-16 MHZ2-2 MHZ2-25 MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 Finger position Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed Lead wire type Explanatory drawing D-Y59 D-Y7P No setting D-Y7W D-F9 D-F9W D-F9BAL D-Y69 D-Y7PV D-Y7WV D-F9V D-F9WV No setting 6.5 No setting No setting 1 Note) "" in the table indicates a skip with no dimension. End boss type L In-line No setting No setting No setting 5 No setting No setting 3 2 L No setting Perpendicular L No setting 1 Auto switch Finger position MHZ2-1 MHZ2-16 MHZ2-2 MHZ2-25 MHZJ2-1 MHZJ2-16 MHZJ2-2 MHZJ2-25 Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed Open Closed D-Y59 D-Y7P No setting D-Y69 D-Y7W D-F9 D-F9W D-F9BAL D-Y7WV D-F9V D-F9WV D-Y7PV No setting Note) "" in the table indicates a skip with no dimension. 27 No setting No setting No setting No setting No setting No setting No setting No setting No setting

31 Basic Wiring Series MHZ2/MHZJ2 Auto Switches Connections and Examples Solid state 3 wire, NPN (Power supply for switch and load are the same.) Main switch circuit [White] Load (Power supply for switch and load are separate.) Main switch circuit [White] Load Solid state 3 wire, PNP Main switch circuit [White] Load 2 wire <Solid state> Main switch circuit Main switch circuit Load Load 2 wire <Reed switch> Indicator light, protection circuit, etc. Indicator light, protection circuit, etc. Load Load Examples of Connection with PLC Sink input specifications Source input specifications 3 wire, NPN 3 wire, PNP Switch [White] Input Switch [White] Input Connect according to the applicable PLC input specifications, as the connection method will vary depending on the PLC input specifications. COM PLC internal circuit 2 wire 2 wire Input COM Input PLC internal circuit Switch Switch COM PLC internal circuit Connection Examples for AND (Series) and OR (Parallel) 3 wire AND connection for NPN output (using relays) Switch 1 Relay [White] Switch 2 Relay [White] Load Relay contact PLC internal circuit 2 wire with 2 switch AND connection 2 wire with 2 switch OR connection COM AND connection for NPN output (performed with switches only) Switch 1 [White] Load Switch 2 [White] The indicator lights will light up when both switches are turned ON. OR connection for NPN output Switch 1 [White] Switch 2 Load [White] Switch 1 Switch 2 Load = 2V V x 2 pcs. = 16V Example: Power supply is 2VDC Voltage decline in switch is V When two switches are connected in series, a load may malfunction because the load voltage will decline when in the ON state. The indicator lights will light up if both of the switches are in the ON state. Residual voltage Load voltage at ON = Power supply voltage x 2 pcs. Switch 1 Switch 2 Load voltage at OFF = Load leakage current x 2 pcs. x = 1mA x 2 pcs. x 3kΩ = 6V Example: Load impedance is 3kΩ Leakage current from switch is 1mA <Solid state> When two switches are connected in parallel, malfunction may occur because the load voltage will increase when in the OFF state. load impedance <Reed switch> Because there is no current leakage, the load voltage will not increase when turned OFF, but due to the number of switches in the ON state, the indicator lights will sometimes get dark or not light up, because of dispersion and reduction of the current flowing to the switches. 28

32 Series MHZ2/MHZJ2 Auto Switch Positioning and Examples Various auto switch applications are possible through different combinations of auto switch quantity and detecting positions. 1) Detection for external gripping of work piece Detection example Position to be detected 1. To detect that fingers have returned Position of fingers fully opened 2. To detect that work piece has been gripped Position when gripping work piece 3. To detect that work piece has not been gripped Position of fingers fully closed Detection combinations Operation of auto switch Capable with one auto switch Two auto switches are necessary Switch turned ON when fingers return. (Light ON) Step 1) Fully open fingers. Switch turned ON when gripping work piece. (Light ON) Step 1) Position fingers for gripping work piece. When gripping work piece (normal): Switch OFF (Light OFF) When not gripping work piece (abnormal): Switch ON (Light ON) Step 1) Fully close fingers. How to determine the auto switch installation position "Set up as directed with power connected under no pressure or low pressure." Step 2) Insert the auto switch into the auto switch mounting groove in the direction of the arrow as shown in the figure. Step 3) Move the auto switch in the direction of the arrow indicated below until indicator light turns ON. Step 3) Move the auto switch in the direction of the arrow and secure the auto switch at a position.3 to.5mm in the direction of the arrow beyond the position where the indicator light turned ON. Position where light turned ON Step ) Keep moving in the direction of the arrow and confirm that the indicator light has turned OFF..3 to.5mm Step 5) Move the auto switch in the opposite direction, and secure it at a position.3 to.5mm in the direction of the arrow beyond the position where the indicator light turned ON. Position to be secured.3 to.5mm Notes) It is recommended that gripping of the work piece be performed close to the center of the finger stroke. The detection combinations shown above may be limited when gripping of the work piece is performed at the end of the opening/closing stroke of the fingers, due to hysteresis of the auto switch. 29

33 Series MHZ2/MHZJ2 Auto Switch Positioning and Examples Various auto switch applications are possible through different combinations of auto switch quantity and detecting positions. 2) Detection for internal gripping of work piece Detection example Position to be detected 1. To detect that fingers have returned Position of fingers fully closed 2. To detect that work piece has been gripped Position when gripping work piece 3. To detect that work piece has not been gripped Position of fingers fully opened Detection combinations Operation of auto switch Capable with one auto switch Two auto switches are necessary How to determine the auto switch installation position Switch turned ON when fingers return. (Light ON) Step 1) Fully close fingers. Switch turned ON when gripping work piece. (Light ON) Step 1) Position fingers for gripping work piece. When gripping work piece (normal): Switch OFF (Light OFF) When not gripping work piece (abnormal): Switch ON (Light ON) Step 1) Fully open fingers. "Set up as directed with power connected under no pressure or low pressure." Step 2) Insert the auto switch into the auto switch mounting groove in the direction of the arrow as shown in the figure. Step 3) Move the auto switch in the direction of the arrow, and secure it at a position.3 to.5mm in the direction of the arrow beyond the position where the indicator light turned ON. Step 3) Move the auto switch in the direction of the arrow indicated below until the indicator light turns ON. Position where light turned ON Step ) Keep moving in the direction of the arrow and confirm that the indicator light has turned OFF. Position to be secured.3 to.5mm Step 5) Move the auto switch in the opposite direction, and secure it at a position.3 to.5mm in the direction of the arrow beyond the position where the indicator light turned ON..3 to.5mm Notes) It is recommended that gripping of the work piece be performed close to the center of the finger stroke. The detection combinations shown above may be limited when gripping of the work piece is performed at the end of the opening/closing stroke of the fingers, due to hysteresis of the auto switch. 3

34 Series MHZ2/MHZJ2 Order Made Specifications Contact SMC for detailed dimensions, specifications and lead times. X7 1 Spring Assisted Type X12 2 With Needle (with Variable Throttle) X6 The dropping of work pieces when pressure falls is prevented by installing a spring for single action in the double acting type. MHZ2 Cylinder bore A variable throttle is installed, allowing adjustment of the finger opening/closing speed. D E X 7 Cylinder bore MHZ2 D E X6 D Action Double acting Finger position/option Standard type Narrow type Nil Basic type N Basic type MHZJ2 Side tap mounting type N1 Through hole in open/close N2 direction Flat finger type Cylinder bore Side tap mounting type Through hole in open/close direction D E X 7 Assist type Closing direction 7 assist Opening direction 12 assist Body option Action Assist type D Double acting Closing direction 7 assist Opening direction 12 assist E W End boss type Side ported End boss type One-touch fitting for coaxial tube Not available when equipped with dust cover/mhzj2. Specifications Type Cylinder bore Action Fluid Dimensions Action D Double acting Finger position/option Standard type Narrow type Nil Basic type N Basic type Side tap mounting type N1 Through hole in open/close N2 direction Flat finger type Side tap mounting type Through hole in open/close direction E W Body option End boss type Side ported End boss type One-touch fitting for coaxial tube With needle 1, 16, 2, 25 Double acting Air Specifications Type Cylinder bore Action Fluid Note) Dimensions are the same as the standard type. Body option End boss type E Side ported End boss type W One-touch fitting for coaxial tube Spring assisted type 1, 16, 2, 25 Double acting Air MHZ2-1D-X6 MHZ2-16D-X6 MHZ2-2D-X6 MHZ2-25D-X6 C width across flats A B A C B D D Refer to pages through 7 for the standard type dimensions, which are the same except for those shown above. Reference value to establish criteria for needle adjustment. Adjust so that the finger opening/closing speed will be no greater than necessary. If the finger opening/closing speed is greater than necessary, impact forces acting on the fingers and other parts will increase. This can cause a loss of repeatability when gripping work pieces and have an adverse effect on the life of the unit. Guide for internal needle adjustment Number of turns from needle fully closed Note 1) MHZ2-1D-X6 1 / to 1 /2 MHZ2-16D-X6 1/2 to 1 MHZ2-2D-X6 1 to 1 1 /2 MHZ2-25D-X6 1 1 /2 to 2 Note 1) The needle is tightened gently until it stops. 31

35 Order Made Specifications Series MHZ2/MHZJ2 3 MHQ2/MHQG2 Compatible Flat Finger Type X51 The flat finger type can be selected depending on the intended application. MHZ2 Cylinder bore D E X51 D S C Action Double acting Single acting (normally open) Single acting (normally closed) Finger position Nil N MHQG2 compatible type MHQ2 compatible type Not available when equipped with dust cover/mhzj2. Body option End boss type E Side ported End boss type W One-touch fitting for coaxial tube K M End boss type One-touch fitting End boss type with M5 port Specifications Type Cylinder bore Action Fluid Dimensions Flat finger type 1, 16, 2, 25 Double acting, Single acting (normally open, normally closed) Air -MM thread depth L Attachment mounting threads B D G B A D C O W S A Unit: mm A B C D G Open Closed MM L W MHZ2-1-X MHQG2 compatible M2 x MHQ2 compatible M2 x MHZ2-16-X MHQG2 compatible M3 x MHQ2 compatible M3 x MHZ2-2-X MHQG2 compatible M x MHQ2 compatible M x MHZ2-25-X MHQG2 compatible M5 x MHQ2 compatible M5 x Refer to pages through 7 for the standard type dimensions, which are the same except for those shown above. 32

36 Selection Selection procedure Series MHZ2/MHZJ2 Selection Method Step 1 Confirm gripping force Step 2 Confirm gripping point Step 3 Confirm external force on fingers Step 1 Confirmation of gripping force Confirmation of conditions Calculation of required gripping force Selection of model from gripping force graph Example Work piece weight:.1kg Gripping method: External gripping Gripping point distance: L=3mm Operating pressure:.mpa selection explanatory drawing selection criteria with respect to work piece weight Although differences will exist depending upon factors such as shape and the coefficient of friction between the attachments and the work pieces, a model should be selected which will provide a gripping force at least 1 to 2 times Note) greater than the work piece weight. Note) For further details, refer to the model selection explanatory drawing. Furthermore, in cases where high acceleration or impact, etc. will occur, it is necessary to allow an even greater margin. Example: When it is desired to set the gripping force at 2 times or more above the work piece weight. Required gripping force =.1kg x 2 x 9.8m/s² (approx.) 19.6N or more MHZ2-16 External gripping Gripping force N Pressure.7MPa.6MPa.5MPa.MPa MPa.2MPa 5 6 When the MHZ2-16D is selected. A gripping force of 2N is obtained from the intersection point of gripping point distance L = 3mm and pressure of.mpa. The gripping force is 2.5 times greater than the work piece weight, and therefore satisfies a gripping force setting value of 2 times or more. F µf mg µf F When gripping a work piece as in the figure to the left, and with the following definitions, F: Gripping force (N) µ: Coefficient of friction between the attachments and the work piece m: Work piece mass (kg) g: Gravitational acceleration ( = 9.8m/s²) mg: Work piece weight (N) the conditions under which the work piece will not drop are "Gripping force at least 1 to 2 times the work piece weight" The "1 to 2 times or more of the work piece weight" recommended by SMC is calculated with the safety margin of a=, which allows for impacts that occur during normal transportation, etc. When µ =.2 When µ =.1 mg F = x 2 x.2 = 1 x mg mg F = x 2 x.1 = 2 x mg 1 x work piece weight 2 x work piece weight Note) Even in cases where the coefficient of friction is greater than µ=.2, for reasons of safety, a gripping force should be selected which is at least 1 to 2 times greater than the work piece weight, as recommended by SMC. It is necessary to allow a greater margin for high accelerations and strong impacts, etc. 2 x µf > mg Number of fingers and therefore, mg F > 2 x µ With "a" representing the extra margin, F is determined by the following formula: mg F = x a 2 x µ 33