A VH Series. VH Series. AComparison with NSK standard products

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1 eatures (1) ig-performance end seals ig-performance end seals wit a multi-lip structure prevent te entry of various foreign matters. (2) lubrication unit (standard) Outstanding lubrication support of NSK furter improves sealing capability and durability. dditional units can be mounted for specific usage conditions and environments. (3) apped oles on a rail bottom surface (optional) In addition to standard mounting bolt oles (counterbores on a rail top surface), a specification for tapped oles on a rail bottom surface for enanced sealing capability is available for te. (Refer to te dimension table.) (4) ig self-aligning capability (rolling direction) Same as te combination in angular contact bearings, self-aligning capability is ig because te cross point of te contact lines of balls and grooves comes inside, reducing moment rigidity. is increases te capacity to absorb errors in installation. (5) ig load carrying capacity to vertical direction e contact angle is set at 50 degrees, tus increasing load carrying capacity as well as rigidity in vertical direction. (6) ig resistance against impact load e bottom ball groove is formed in otic arc and te center of te top and bottom grooves are offset as sown in ig. 2. e vertical load is generally carried by te top rows, at were balls are contacting at two points. ecause of tis design, te bottom rows will carry load wen a large impact load is applied vertically as sown in ig. 3. is assures ig resistance to te impact load. (7) ig accuracy s sowing in ig. 4, fixing te master rollers to te ball grooves is easy tanks to te otic arc groove. is makes easy and accurate measuring of ball grooves. (8) Random matcing type Random-matcing of rails and ball slides are available. (9) Improve rating life dramatically New ball groove geometry is introduced, M Normal load ig. 1 Q Supported by 2 rows rinding weel rinding of datum surface and ball grooves ontact stress Impact load ig. 3 en load is applied Measuring of ball grooves ottom seal ig. 2 nlarged illustration of te offset otic arc groove Supported by 4 rows ig. 4 Rail grinding and measuring Master roller wic as been developed by utilizing NSK's state-of-te-art tribological and analytical tecnologies. ue to te optimized distribution of contact surface pressures, te rating life as dramatically increased. s compared wit te conventional products, te load rating capacity as increased to 1.3 times, wile te life span as increased to twice *1. *1: Representative values of series. omparison wit NSK standard products ess tan 1/10 te level of fine contaminants Results of dust-proof tests reveal tat te entry of fine contaminants is reduced to less tan one-tent of existing standard series due to improvements in sealing capability. est sample Speed ontaminant : V30N : 16.7 mm/sec : rapite powder (average grain size: mm) + rease Operating life under contaminated environments is more tan 5 times longer urability test wit rubber fragments xtreme durability tests under contaminated environments using rubber fragments sow tat durability of te extended more tan five times longer tan te existing standard series, as sown in te grap. est sample : V30N, preload code Z1 (preload of 245 N) Rail orientation : orizontal (wall mount) Speed : 500 mm/sec ubrication : S2 grease (prepacked S2 only) ontaminant : Rubber fragments urability test wit fine wood particles xtreme durability tests in a contaminated environment wit fine wood particles sow tat durability of te is more tan doubled efore te passage of ball slide (eavily contaminated wit wood particle) compared to te standard series, as sown in te grap. est sample : V30N (preload of N) Rail orientation : orizontal (wall mount) Speed : 400 mm/sec ubrication : S2 grease (prepacked S2 only) ontaminant : ine wood particles Standard Standard Standard Penetration of foreign matter, g e data sown in te catalog are te results of our tests, and no warranty is given to sealing performance on actual usage on macinery. Sealing performance is affected by usage environment and lubrication conditions. ust covers and oter measures to keep macinery free of dust are recommended g g Running distance, km Running distance, km fter te passage of ball slide (ll contaminant particles are swept away)

2 8. Reference number Reference numbers sall be set to individual NSK linear guide wen its specifications are finalized, and it is indicated on its specification drawing. Please specify te reference number, except design serial number, to identify te product wen ordering, requiring estimates, or inquiring about specifications from NSK. (1) Reference number for preloaded assembly Series name V N 2 -** K5 3 all slide sape code (See page 135.) : Special ig carbon steel (NSK standard), K: Stainless steel (2) Reference number for random-matcing type all slide Random-matcing ball slide series code V: random-matcing ball slide all slide sape code (See page 135.) V 30 N -**K Z 0: Z0, 1: Z1, 3: Z3 ccuracy code (See able 16.) Number of ball slides per rail Preload code : ine clearance. Z: Sligt preload (See page 137.) ccuracy code: K K: Normal grade is only available. able 15 Material/surface treatment code ode escription Special ig carbon steel (NSK standard) + counterbores on a rail top surface K Stainless steel + counterbores on a rail top surface Special ig carbon steel wit surface treatment + counterbores on a rail top surface Stainless steel wit surface treatment + counterbores on a rail top surface V Special ig carbon steel (NSK standard) + tapped oles on a rail bottom surface Stainless steel + tapped oles on a rail bottom surface Special ig carbon steel wit surface treatment + tapped oles on a rail bottom surface S Stainless steel wit surface treatment + tapped oles on a rail bottom surface Z Oter, special able 16 ccuracy code ccuracy Standard (wit ) Ultra precision grade K3 Super precision grade K4 ig precision grade K5 Precision grade K6 Normal grade KN Normal grade (random-matcing type) K Note: Refer to page 38 for lubrication unit. Rail Random-matcing rail series code V1: random-matcing rail V N -** P Z Rail sape code: : Standard : ine clearance. Z: Sligt preload ccuracy code: P P: Normal grade is only available. *utting rail specification N: Non-butting. : utting specification *Please consult wit NSK for butting rail specification. e reference number coding for te assembly of random-matcing type is te same as tat of preloaded assembly. owever, te preload code of "fine clearance " and "sligt preload Z" is only applicable (refer to page 137)

3 all slide sape all slide Model N N M M Sape/installation metod ype (Upper row, Rating: ower row, all slide lengt) ig-load type Super-ig-load type Standard ong N N M M ccuracy and preload (1) Running parallelism of ball slide Rail lengt (mm) Ultra precision K3 able 1 Preloaded assembly (not random matcing) Randommatcing type ig Precision Normal grade Normal grade precision K5 grade K6 KN K Super precision K4 over or less (2) ccuracy standard e preloaded assembly as five accuracy grades; Ultra precision K3, Super precision K4, ig precision K5, Precision K6, and Normal KN grades, wile te random-matcing type as Normal K grade only. olerance of preloaded assembly able 2 ccuracy grade Ultra precision Super precision ig precision Precision grade Normal grade aracteristics K3 K4 K5 K6 KN Mounting eigt ±10 ±10 ±20 ±40 ±80 Variation of (ll ball slides on a set of rails) Mounting widt 2 or 3 ±15 ±15 ±25 ±50 ±100 Variation of 2 or (ll ball slides on reference rail) Running parallelism of surface to surface Sown in able 1, ig. 5 and ig. 6 Running parallelism of surface to surface olerance of random-matcing type: Normal grade K able 3 V15, 20, 25, 30, 35 V45, 55 aracteristics Mounting eigt ±20 ±30 Variation of mounting eigt Mounting widt 2 or 3 ±30 ±35 Variation of mounting widt 2 or Running parallelism of surface to surface Running parallelism of surface to surface See able 1, ig. 5 and ig. 6 Note: 1 Variation on te same rail 2 Variation on multiple rails 136

4 (3) ombinations of accuracy and preload able 4 ccuracy grade Ultra precision Super precision ig Precision Precision grade Normal grade Normal grade it lubrication unit K3 K4 K5 K6 KN K ine clearance Z0 Sligt preload a a a a a Z1 Medium preload a a a a a Z3 Random-matcing type wit fine clearance a a a a Z Random-matcing type wit sligt preload a ZZ a Preload (4) ssembled accuracy 137 roove mark (Marked on eiter lateral or bottom surface for a rail) roove mark atum surface mark 2 Mounting widt 2 2 Mounting widt 2 K mark Reference rail of preloaded assembly type only K mark Reference rail of preloaded assembly type only roove mark K mark Reference rail of preloaded assembly type only ig. 5 Special ig carbon steel ig. 6 Stainless steel 3 roove mark K mark 3 Reference rail of preloaded assembly type only Mounting widt 3 Mounting widt 3 roove mark (Marked on eiter lateral or bottom surface for a rail) atum surface mark (5) Preload and rigidity e offer five levels of preload: Sligt preload Z1, Medium preload Z3 and ine clearance Z0, along wit random-matcing type of ine clearance Z and Sligt preload ZZ. Preload and rigidity of preloaded assembly able 5 Rigidity (N/μm) Preload Vertical direction ateral direction Sligt preload Medium preload Sligt preload Medium preload Sligt preload Medium preload Z1 Z3 Z1 Z3 Z1 Z3 V15 N, M V20 N, M V25 N,, M V30 N, V30 M V35 N,, M V45 N,, M V55 N,, M V15 N, M V20 N, M V25 N,, M V30 N,, M V35 N,, M V45 N,, M V55 N,, M Note: learance for ine clearance Z0 is 0 to 3 μm. erefore, preload is zero. owever, Z0 of PN grade is 0 to 15 μm. Preload of random-matcing type able 6 ine clearance Sligt preload Z ZZ V V V V V V V Note: Minus sign denotes tat a value is an amount of preload (elastic deformation of balls). Super-ig-load type ig-load type 4. Maximum rail lengt able 7 sows te limitations of rail lengt (maximum lengt). owever, te limitations vary by accuracy grade. able 7 engt limitations of rails Series Material V Special ig carbon steel Stainless steel Note: Rails can be butted if user requirement exceeds te rail lengt sown in te table. Please consult NSK. 138

5 5. Installation (1) Permissible values of mounting error r r ' ig. 7 (2) Soulder eigt of te mounting surface and corner radius r r r e1 able 8 Value Preload V15 V20 V25 V30 V35 V45 V55 Z0, Z Permissible values of Z1, ZZ parallelism in two rails e 1 Z Permissible values of Z0, Z 375 μm/500 mm parallelism (eigt) in two rails e 2 Z1, ZZ, Z3 330 μm/500 mm ig. 9 Soulder for te rail datum surface '' ig. 10 Soulder for te ball slide datum surface (3) Specification for tapped oles on a rail bottom surface pplicable accuracy grades are precision grade (K6) and normal grades (KN and K) only. e minimum rail lengt for production is 400 mm. e tapping pitc is te same as te pitc for regular mounting bolt oles. Please refer to te dimension table. e2 ig able 9 orner radius (maximum) Soulder eigt r a r b ' " V V V V V V V ubrication components Refer to pages 38 and 13 for te lubrication of linear guides. (1) ypes of lubrication accessories ig. 12 and able 10 sow grease fittings and tube fittings. e provide lubrication accessories wit extended tread body lengt () for te addition of dust-proof accessories suc as lubrication unit, double seal and protector. e provide a suitable lubrication accessory for te special requirement on dust-proof accessories. onsult NSK for a lubrication accessory wit extended lengt of tread body for your convenience of replenising lubricant. Please ask NSK for stainless lubrication accessories. (2) Mounting position of lubrication accessories e standard position of grease fittings is te end face of ball slide. e mount tem on a side of end cap for an option. (ig. 13) Please consult NSK for installation of grease or tube fittings to te ball slide body or side of end cap. en using a piping unit wit tread of M6 1, you require a connector to connect to a grease fitting mounting ole wit M e connector is available from NSK. all slide body nd cap Standard position Optional position rease fitting rive-in type (j3) type type type ube fitting (M or R1/8) Rc1/8 Rc1/8 S type type (M or R1/8) (M or R1/8) ig. 12 rease fitting and tube fitting able 10 ust-proof rease fitting ube fitting specification read body lengt read body lengt Standard* 10 V15 ouble seal ** Protector ** Standard* 12 V20 ouble seal 18 Protector 18 Standard* V25 ouble seal 18 23*** Protector Standard* V30 ouble seal Protector Standard* V35 ouble seal Protector Standard* V45 ouble seal Protector Standard* V55 ouble seal Protector *) units are mounted as a standard specification for V series. **) connector is required for grease fitting. Please contact NSK. ***) Only available for N and N type ball slides. 139 ig. 11 ig. 13 Mounting position of lubrication accessories 140

6 7. ust-proof components (1) Standard specification o keep foreign matters from entering inside te ball slide, as an end seal on bot ends, and bottom seals at te bottom. wo, one at eac end, are installed as te standard equipment. ig. 14 able 11 Seal friction per ball slide (maximum value) Unit: N Series V (2) ouble seal and protector or, double-seal and protector can be installed only before sipping from te factory. Please consult NSK wen you require tem. able 12 sows te ball slide lengt wen a double seal set and a protector are installed. ottom seal able 12 imension of installing dust-proof optional components all slide all slide all slide lengt lengt model Standard ouble seal installation Protector installation V15 ong type N, M N, M V20 ong type N, M N, M V25 N,, M ong type N,, M V30 M N, ong type N,, M V35 ong type N,, M N,, M V45 ong type N,, M N,, M V55 N,, M ong type N,, M Spacer for ig performance seal ouble seal Spacer for ig performance seal Protector Protector ig. 17 all slide all slide nd cap nd cap Spacer for ig performance seal rease fitting Rail ig. 15 ouble seal Spacer for ig performance seal Protector rease fitting Rail ig. 16 Protector (3) ap to plug te rail mounting bolt ole able 13 aps to plug rail bolt ole olt to ap Quantity secure rail reference No. /case V15 M4 -P/M4 20 V20 M5 -P/M5 20 V25 M6 -P/M6 20 (4) Inner seal e availability of inner seal is limited to te models sown below. able 14 Series V V20, V25, V30, V45, V55 V30, V35 M8 -P/M8 20 V45 M12 -P/M12 20 V55 M14 -P/M

7 9. imensions V-N (ig-load type / Standard) V-N (Super-ig-load type/ ong) V N 2 -** K Z Series name all slide sape code (See page 135.) : Special ig carbon steel (NSK standard), K: Stainless steel 0: Z0, 1: Z1, 3: Z3, : Z, Z: ZZ ccuracy code (See able 16.) Number of ball slides per rail Reference number for ball slide of random-matcing type all slide V 30 N -**K Z Random-matcing ball slide series code V: random-matcing ball slide all slide sape code (See page 135.) N and N types N type 1 : ine clearance. Z: Sligt preload ccuracy code: K K: Normal grade is only available. N type 1 ront view of N and N type K 2 Specification for tapped oles on a rail bottom face 1 Side view of N type d Side view of N type n K 2 Reference number for rail of random-matcing type Rail V N -** P Z Random-matcing rail series code V1: random-matcing rail Rail sape code: : Standard : ine clearance. Z: Sligt preload ccuracy code: P P: Normal grade is only available. *utting rail specification N: Non-butting. : utting specification *Please consult wit NSK for butting rail specification. j M2 2 ssembly eigt idt engt all slide Mounting ole rease fitting idt eigt 2 M pitc l 1 K K 1 ole size 1 N 1 1 V15N M V15N j V20N M V20N M V25N M V25N M V30N M V30N M V35N M M V35N V45N M V45N Rc1/ V55N M V55N Rc1/ Notes: 1) igure inside is te dimension wen equipped wit te protector. 2) does not ave a ball retainer. e aware tat balls fall out wen te ball slide is witdrawn from te rail. 3) xternal appearance of stainless steel ball slides differs from tose of carbon steel ball slides. jd 0 Rail asic load rating eigt 4) Pitc Mounting apped ole Max. ynamic Static Static moment (N m) all Rail bolt ole lengt 0max. slide 50km 100km 0 M RO M PO M YO ( ) for d M 2 pitc l 2 (reference) stainless One slide wo slides One slide wo slides (kg) (kg/m) M [1 800] M [3 500] M [3 500] M [3 500] M M M ) e basic load rating comply wit te ISO standard. (ISO , ) 50; te basic dynamic load rating for 50 km rated fatigue life 100; te basic dynamic load rating for 100 km rated fatigue life e basic static load rating sows static permissible load. n 146

8 V- (ig-load type / Standard) V- (Super-ig-load type / ong) V ** K Z Series name all slide sape code (See page 135.) : Special ig carbon steel (NSK standard), K: Stainless steel ront view of and type Side view of type 0: Z0, 1: Z1, 3: Z3, : Z, Z: ZZ ccuracy code (See able 16.) Number of ball slides per rail 1 Reference number for ball slide of random-matcing type all slide Random-matcing ball slide series code K M RO V 30 -**K Z V: random-matcing ball slide all slide sape code (See page 135.) and types M YO type M PO 1 : ine clearance. Z: Sligt preload ccuracy code: K K: Normal grade is only available. type 1 K 2 Specification for tapped oles on a rail bottom face 1 d Side view of type n Reference number for rail of random-matcing type Rail V N -** P Z Random-matcing rail series code V1: random-matcing rail Rail sape code: : Standard : ine clearance. Z: Sligt preload ccuracy code: P P: Normal grade is only available. *utting rail specification N: Non-butting. : utting specification *Please consult wit NSK for butting rail specification. j 1 M2 2 ssembly eigt idt engt all slide Mounting ole rease fitting idt eigt 2 M pitc l 1 K K 1 ole size 1 N 1 1 V M V M V M V M V M M V V M V Rc1/ V M V Rc1/ Notes: 1) igure inside is te dimension wen equipped wit te protector. 2) does not ave a ball retainer. e aware tat balls fall out wen te ball slide is witdrawn from te rail. 3) xternal appearance of stainless steel ball slides differs from tose of carbon steel ball slides. jd 0 Rail asic load rating eigt 4) Pitc Mounting apped ole Max. ynamic Static Static moment (N m) all Rail bolt ole lengt 0max. slide 50km 100km 0 M RO M PO M YO ( ) for d M 2 pitc l 2 (reference) stainless One slide wo slides One slide wo slides (kg) (kg/m) M [3 500] M [3 500] M M M ) e basic load rating comply wit te ISO standard. (ISO , ) 50; te basic dynamic load rating for 50 km rated fatigue life 100; te basic dynamic load rating for 100 km rated fatigue life e basic static load rating sows static permissible load. n

9 V-M (ig-load type / Standard) V-M (Super-ig-load type / ong) V M 2 -** K Z Series name all slide sape code (See page 135.) : Special ig carbon steel (NSK standard), K: Stainless steel ront view of M and M type Side view of M type 0: Z0, 1: Z1, 3: Z3, : Z, Z: ZZ ccuracy code (See able 16.) Number of ball slides per rail Reference number for ball slide of random-matcing type all slide V 30 M -**K Z Random-matcing ball slide series code V: random-matcing ball slide all slide sape code (See page 135.) M and M types M type ( Q2 pilot drill) 1 : ine clearance. Z: Sligt preload ccuracy code: K K: Normal grade is only available. M type 1 ( Q2 pilot drill) 1 K 2 K M2 2 2 Specification for tapped oles on a rail bottom face 1 Notes: 1) igure inside is te dimension wen equipped wit te protector. 2) igure inside [ ] is applied to stainless products. 3) does not ave a ball retainer. e aware tat balls fall out wen te ball slide is witdrawn from te rail. 4) xternal appearance of stainless steel ball slides differs from tose of carbon steel ball slides. 149 d Side view of M type n 0 1 ssembly all slide eigt idt engt Mounting ole rease fitting idt eigt Q 1 l 1 ole 2 M 1 pitc l 1 Q 2 1 K K 1 size 1 N 1 1 V15M V15M M j V20M V20M M M V25M M V25M [M ] [12] M V30M M V30M [M ] [15] M V35M V35M M M V45M V45M M Rc1/ V55M V55M M Rc1/ Reference number for rail of random-matcing type Rail V N -** P Z Random-matcing rail series code V1: random-matcing rail Rail sape code: : Standard 1 : ine clearance. Z: Sligt preload ccuracy code: P P: Normal grade is only available. *utting rail specification N: Non-butting. : utting specification *Please consult wit NSK for butting rail specification. j jd Rail asic load rating eigt 5) Pitc Mounting apped ole Max. ynamic Static Static moment (N m) all Rail bolt ole lengt 0max. slide 50km 100km 0 M RO M PO M YO ( ) for d M 2 pitc l 2 (reference) stainless One slide wo slides One slide wo slides (kg) (kg/m) M [1 800] M [3 500] M [3 500] M [3 500] M M M ) e basic load rating comply wit te ISO standard. (ISO , ) 50; te basic dynamic load rating for 50 km rated fatigue life 100; te basic dynamic load rating for 100 km rated fatigue life e basic static load rating sows static permissible load. n 0 150

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