NSK LINEAR GUIDES NH SERIES, NS SERIES. New series delivers world s highest load rating with more than twice the operating life.

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1 NK INEAR GUIDE NH ERIE, N ERIE New series delivers world s highest load rating with more than twice the operating life. Patent Pending

2 With state-of-the-art technology, the standard in NK inear Guides TM has been reborn. Features of NH and N eries 1. Excellent durability uper-long life, twice as long compared to conventional series NH and N series have a load rating 1.3 times greater and a lifespan two times longer than H and eries* 1. These features enable you to design a machine with a longer life and/or downsize the machine. *1: Based on the representative values of each series. Maintenance-free Installing NK K1 TM lubrication unit (optional) ensures a long-term, maintenance-free operation, saving cost. Environmental protection can also be achieved. NH eries arger load rating capacity What is NK K1 TM lubrication unit? NK K1 TM is a lubrication device which combines oil and resin in a single unit. The porous resin contains a large amount of lubrication oil. As the linear guide operates, the NK K1 TM provides fresh oil to the contacting surfaces. 2. Easy-to-use "tandard inear Guides" Random-matching (interchangeable) type is available The rails and ball slides can be selected in many combinations. All NH/N models can be interchanged with H and eries, respectively. Free combination of different ball slide types, accuracy grades, and preload can be made. Robust design to absorb mounting errors The DF combination results in a high self-aligning capability. This increases the capacity to absorb errors in installation, and will demand less work to achieve precision in mounting the linear guide. Fig. 1 Options Accessory options are available, including NK K1 TM lubrication units, double seals, protectors, surface treatments, etc. Mounting dimensions are the same as the H and eries NH and N are completely interchangeable with H and and can be used without making any design modifications. N eries Compact, low-profile shape By mounting a NK K1 TM lubrication unit (optional), a long-term, maintenance-free operation can be achieved. 2

3 Produced through state-of-the-art technology Based on the H/ eries, which have achieved exceptional results in numerous application areas since their debut in 1989, the new NH/N eries are created as the focal point of NK's cumulated state-of-the-art design and manufacturing technologies. Ball groove geometry contributing to long life New ball groove geometry is introduced, which has been developed by utilizing NK's state-of-the-art tribological and analytical technologies. Due to the optimized distribution of contact surface pressure, the rating life has dramatically increased. As compared with the H/ eries, the load rating capacity of the new series has increased 1.3 times, while the life span has increased two times* 1. *1: Representative values of each series. H/ eries with reliability and performance + NK's state-of-the-art design/manufacturing technologies Basic dynamic load rating [ km] C (N) New series of standard linear guides: the NH eries and N eries 0 NH eries H eries 1.3 times Ball circulating groove with excellent high-speed capability = 1.3 times 1.3 times #20 #25 # ize By re-examining the design for the ball circulation path, we have attained smoother ball circulation and a reduced noise level. The new NH/N series are well suited for high-speed applications. Noise level: db (A) NH eries H eries A decrease of approximately 3 db A decrease of approximately 3 db 90m/min 180m/min Feed speed *Measurement results results are are obtained from from the the size size #25 #25 linear guide alone. alone. Microphone Microphone position: position: 0 mm 0 above mm above the top the top of the of the specimen specimen The noise The noise level varies level varies depending depending on the on the microphone position. position. 3

4 pecifications 1. Ball lide hape Two types of ball slides are available: square type with tapped holes and mounting flange type. A compact, square type, low-profile model is also available. On the mounting holes of the flange type, the tapped part is used to fix the ball slide from the top surface, while the minor diameter can be used as a bolt hole for mounting from the bottom. This enables mounting from either direction, top or bottom. The ball slide length is available in three lengths: standard high-load, long super-high load or short medium-load. The available ball slide length differs depending on the type. Please refer to the dimension table. Fig. 2 shape shape hape/installation method Type (Upper row: Rating; ower row: length) High-load type uper-high-load type Medium-load type tandard ong hort AN BN AN BN A B C A B C EM GM JM EM GM JM 2. Maximum Rail ength Table 1 shows the limitations of rail length (maximum length). Depending on the required accuracy grade, the available maximum rail length might be shorter than that shown in Table 1. Table 1 ength limitations of rails Unit: mm eries Material ize NH N pecial high carbon steel tainless steel pecial high carbon steel tainless steel Note: Rails can be butted if user requirement exceeds the rail length shown in the table. Please consult NK. 4

5 3. Accuracy The setting of the accuracy grade differs depending on whether the required type is of the preloaded assembly or the interchangeable type. For the preloaded assembly, different accuracy grades are available: Ultra precision P3, uper precision P4, High precision P5, Precision P6, and Normal PN grades. The interchangeable type has High Precision PH and Normal PC grade. Table 2 Tolerance of preloaded assembly Unit: µm Characteristics Mounting height H Variation of H (All ball slides on a set of rails) Accuracy grade Ultra precision P3 ±10 3 uper precision P4 ±10 5 High precision P5 ±20 7 Precision grade P6 ±40 15 Normal grade PN ±80 25 Mounting width W 2 or W 3 Variation of W 2 or W 3 (All ball slides on reference rail) Running parallelism of surface C to surface A Running parallelism of surface D to surface B ±15 3 ±15 7 ±25 10 Refer to Fig. 3 and Table 4. ± 20 ±100 Table 3 Tolerance of interchangeable type Unit: µm Accuracy grade High precision grade Normal grade Characteristics PH PC NH15,20,25,,35 NH15,20,25,,35 NH45,55,65 N15,20,25,,35 N15,20,25,,35 NH45,55,65 Mounting height H ±20 ± ±20 ± Variation of mounting height H Mounting width W 2 or W 3 ± ±35 ± ±35 Variation of mounting width W 2 or W Running parallelism of surface C to surface A Running parallelism of surface D to surface B Refer to Fig. 3 and Table 4. Note: Variation in the interchangeable products means the variation among the values taken at the same position on the same rail. Table 4 Running parallelism of ball slide Unit: µm Rail length Preload assembly Interchangeable type (mm) Ultra precision P3 uper precision P4 High precision P5 Precision grade P6 Normal grade PN High precision PH Normal grade PC Over ~ or less ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Fig. 3 pecifications of accuracy C D D C H H A Groove mark for datum surface (Marked on either lateral or bottom surface for a rail) B W2 K mark Reference rail of preloaded assembly type only Groove mark for datum surface K mark Reference rail of preloaded assembly type only W3 B A Groove mark for datum surface (Marked on either lateral or bottom surface for a rail) Mounting width W2 Mounting width W3 5

6 4. Preload and Rigidity Preload setting differs between the preloaded assembly and interchangeable types. For the preloaded assembly, Medium preload 3, light preload 1 and Fine clearance 0 are available. For the interchangeable type, Medium preload H, light preload and Fine clearance T are available. Possible combinations between the accuracy and preload grades are shown in Table 9. Table 5 Preload and rigidity of preloaded assembly (1) NH eries Rigidity (N/μm) Preload (N) Vertical direction ateral direction light preload 1 Medium preload 3 light preload 1 Medium preload 3 light preload 1 Medium preload 3 NH15 AN, EM NH20 AN, EM NH25 A, AN, EM NH A, AN NH EM NH35 A, AN, EM NH45 A, AN, EM NH55 A, AN, EM NH65 AN, EM NH15 BN, GM NH20 BN, GM NH25 B, BN, GM NH B, BN, GM NH35 B, BN, GM NH45 B, BN, GM NH55 B, BN, GM NH65 BN, GM Note: Clearance for Fine clearance 0 is 0 to 3 μm, Therefore, preload is zero. However, 0 of PN grade is 0 to 15 μm. Table 7 Preload and rigidity of preloaded assembly (2) N eries Rigidity (N/μm) Preload (N) Vertical direction ateral direction light preload 1 Medium preload 3 light preload 1 Medium preload 3 light preload 1 Medium preload 3 N15 A, EM N20 A, EM N25 A, EM N A, EM N35 A, EM N15 C, JM N20 C, JM N25 C, JM N C, JM N35 C, JM Note: Clearance for Fine clearance 0 is 0 to 3 μm, Therefore, preload is zero. However, 0 of PN grade is 0 to 15 μm. Table 6 Clearance and preload of interchangeable type (1) NH eries Unit: µm Fine clearance T light preload Medium preload H NH15 4 ~ 15 4 ~ 0 3 ~ 7 NH20 5 ~ 0 3 ~ 8 NH25 5 ~ 0 4 ~ 9 NH 7 ~ 0 5 ~ 12 NH35 5 ~ 15 7 ~ 0 5 ~ 12 NH45 7 ~ 0 7 ~ 14 NH55 9 ~ 0 9 ~ 18 NH65 9 ~ 0 10 ~ 19 Note: Minus sign denotes a value is an amount of preload (elastic deformation of balls). Table 8 Clearance and preload of interchangeable type (2) N eries Unit: µm Fine clearance T light preload Medium preload H N15 4 ~ 15 4 ~ 0 3 ~ 7 N20 4 ~ 15 4 ~ 0 3 ~ 7 N25 5 ~ 15 5 ~ 0 4 ~ 9 N 5 ~ 15 5 ~ 0 4 ~ 9 N35 5 ~ 15 6 ~ 0 4 ~ 10 Note: Minus sign denotes a value is an amount of preload (elastic deformation of balls). Table 9 Combinations of accuracy and preload Ultra precision uper precision High precision Accuracy grade Precision grade Normal grade High precision Without NK K1 TM lubrication unit P3 P4 P5 P6 PN PH PC With NK K1 TM lubrication unit K3 K4 K5 K6 KN KH KC With NK K1 TM for food and medical equipment F3 F4 F5 F6 FN FH FC Fine clearance 0 Preload light preload 1 Medium preload 3 Interchangeable type with fine clearance T Interchangeable type with slight preload Interchangeable type with medium preload H Normal grade 6

7 5. Basic oad Rating and Rating ife The basic load rating used for expressing the load capacity of the linear guide is determined by IO standards (IO , ). The load rating applied to NK inear Guides complies with the IO standards. The basic dynamic load rating is the non-fluctuating load which acts on the center of the ball slide from above, and under which the rating fatigue life of 100 km or km is expressed. When load F is only applied to the ball slide in the up/down direction, its rating fatigue life, can be calculated using the following equation, where C 100 means a basic dynamic load rating for 100 km rating fatigue life and C means a basic dynamic load rating for km rating fatigue life respectively. The basic static load rating is the static load which generates a contact stress of MPa at the center of the contact area between the rolling element subjected to the maximum stress and the raceway surface. In this most heavily stressed contact area, the sum of the permanent deformation of the rolling element and that of the raceway is nearly times the rolling element s diameter. The basic load rating values are written in the dimension table. In NH and N series, the contact angle is set at degrees, and thus increasing load carrying capacity in vertical direction. Each basic load rating in the down, up and lateral load direction is shown at Table 11. Please note that the equation used here for calculating the product life is different from the one used for the linear guides for which rollers are used as rolling elements. The load factor is expressed as fw. elect the best-suited load factor, referring to the values given in Table 10, according to the potential vibration or impact loads in the machine onto which the linear guide is to be mounted. = C 100 fw F or = 3 C fw F [km] The loads applied to the linear guide (i.e., ball slide loads) range from loads in the up/down or right/left direction to moment loads. ometimes, more than one type of load is applied simultaneously or the volume and direction of the load may vary. Varying loads cannot be used for the life calculation of the linear guide as they are. Therefore, it is necessary to use a hypothetical constant load applied to the ball slide, which would generate a fatigue life equivalent to the actual fatigue life. This is called the dynamic equivalent load. To calculate the dynamic equivalent load, use the loads provided in Table 12. Table 12 oads in the arrangement of linear guides Pattern Arrangement of linear guide oads necessary to calculate dynamic equivalent load oad Moment load Up/down (vertical) Right/left (lateral) Rolling Pitching Yawing Dynamic equivalent load 1 2 F r F r F s F s M r M r M p M y F r = F r F se = F s tan a F re = e r M r F pe = e p M p F ye = e y M y 3 F r F s M p M y 4 F r F s a : Contact angle ( = ) Dynamic equivalent coefficients e r : Rolling direction e p : Pitching direction e y : Yawing direction The formula is determined by the relationship of loads in terms of volume. A full dynamic equivalent load can be easily obtained by using each coefficient. After obtaining the dynamic equivalent load of the necessary load direction from Table 13, use the formulas below to calculate full dynamic equivalent loads. When F r is the largest load: F e = F r + 0.5F se + 0.5F re + 0.5F pe + 0.5F ye When F se is the largest load: F e = 0.5F r + F se + 0.5F re + 0.5F pe + 0.5F ye When F re is the largest load: F e = 0.5F r + 0.5F se + F re + 0.5F pe + 0.5F ye When F pe is the largest load: F e = 0.5F r + 0.5F se + 0.5F re + F pe + 0.5F ye When F ye is the largest load: F e = 0.5F r + 0.5F se + 0.5F re + 0.5F pe + F ye For the values of each dynamic equivalent load in the formulas above, disregard load directions and take the absolute value. Table 10 oad factor fw Impact/vibration oad factor No external impact/vibration 1.0 ~ 1.5 There is impact/vibration from outside. 1.5 ~ 2.0 There is significant impact/vibration. 2.0 ~ 3.0 Table 11 Basic load rating by load direction oad rating Direction Downward Upward ateral Basic dynamic load rating C C 0.84C Basic static load rating C C C 0 Fig. 4 oad directions Fr Mr Fs Mp Table 13 Dynamic equivalent coefficients Dynamic equivalent coefficients (1/m) Model e r e p e y NH15AN, EM NH15BN, GM NH20AN, EM NH20BN, GM NH25A, AN, EM NH25B, BN, GM NHA, AN NHEM NHB, BN, GM NH35A, AN, EM NH35B, BN, GM NH45A, AN, EM NH45B, BN, GM 36 NH55A, AN, EM NH55B, BN, GM NH65AN, EM NH65BN, GM N15A, EM N15C, JM N20A, EM N20C, JM N25A, EM N25C, JM NA, EM NC, JM N35A, EM N35C, JM My 7

8 6. Dust-proof parts and ubrication accessories (1) tandard specification tandard specification can be readily used as they have a dust protection means for normal conditions. As standard equipment, the ball slides have end seals and bottom seals. Dust-proof parts are available, as shown in Table 14. elect the best-suited one according to the environment. Table 14 Optional dust-proof parts Name Purpose NK K1 TM lubrication unit Made of oil impregnated resin. Enhances lubricating functions. Double seal It combines two end seals for enhancing sealing function. Protector Protect the end seal from hot and hard contaminants. Rail cap Prevents foreign matters generated in cutting operation from clogging the rail-mounting holes. Inner seal Installed inside a slide, and prevents foreign matters from entering the rolling contact surface. Bellows Covers the linear guide. Note: Inner seals can be selected for NH20-65 and N (2) Mounting position of the lubrication accessories The standard position of grease fittings is the end face of ball slide. We mount them on a side of end cap for an option. (Fig. 6). Please consult NK for installation of grease or tube fittings to the ball slide body or side of end cap. (3) NK K1 TM ubrication unit Table 15 shows the dimensions of the linear guides equipped with the NK K1 TM lubrication unit. Table 15 Fig. 7 N V1 V2 Protective cover 7. Rust Prevention (1) tainless steel tainless steel material can be selected for the parts made of carbon steel. The models which can be made with stainless steel are NH15- and N However, the high precision (PH) grade and the medium preload (H) type of the interchangeable type can not be made from stainless steel. (2) urface treatment Regarding surface treatment, NK recommends low temperature chrome plating or fluoride low temperature chrome plating. Please consult NK for other surface treatment. V2 V1 End seal NK K1 TM Table 16 Material/surface treatment code Code Description C pecial high carbon steel (NK standard) tainless steel D pecial high carbon steel with surface treatment H tainless steel with surface treatment Other, special tandard ball slide length Fig. 5 End seal (side seal) Fig. 6 Mounting position of lubrication accessories End cap tandard position length installed with two NK K1 TM body Per NK K1 TM thickness V 1 Protective cover thickness V 2 Bottom seal (under seal) Optional position Unit: mm Protruding area of the grease fitting N NH15 AN, EM BN, GM (5) NH20 AN, EM BN, GM (14) NH25 A, AN, EM B, BN, GM (14) A, AN NH EM (14) B, BN, GM NH35 A, AN, EM B, BN, GM (14) NH45 A, AN, EM B, BN, GM (15) NH55 A, AN, EM B, BN, GM (15) NH65 AN, EM BN, GM (16) N15 A, EM C, JM (5) N20 A, EM C, JM (14) N25 A, EM C, JM (14) N A, EM C, JM (14) N35 A, EM C, JM (14) Notes: (1) NK K1 TM for food and medical equipments are available for NH15-35 and N (2) length equipped with NK K1 TM = (tandard ball slide length) + (Thickness of NK K1 TM, V 1 x Number of NK K1 TM ) + (Thickness of the protective cover, V 2 x 2) 8

9 8. Installation (1) Permissible values of mounting error Mounting errors may result in harmful effects, such as shortened operating life, deteriorated motion accuracy and/or friction variation. Using those mounting errors shown in Figures 8 and 9 as representative errors, Tables 17 and 18 show the mounting tolerances. Fig. 8 Fig. 9 e1 e2 0 Table 17 Unit: µm Value Preload NH15 NH20 NH25 NH NH35 NH45 NH55 NH65 0, T Permissible values of 1, parallelism in two rails e 1 3, H Permissible values of 0, T 375µm/0mm parallelism(height) in two rails e 2 1,, 3, H 3µm/0mm Table 18 Unit: µm Value Preload N15 N20 N25 N N35 0, T Permissible values of 1, parallelism in two rails e 1 3, H Permissible values of 0, T 375µm/0mm parallelism(height) in two rails e 2 1,, 3, H 3µm/0mm (2) houlder height and corner radius of the mounting surface When horizontally fixing a rail or ball slide by pushing it to the shoulder (the riser portion of the mounting surface) of the bed or table, refer to the shoulder height and corner radius specified in Fig. 10 and 11 and Table 19 as well. Table 19 Unit: mm houlder height of the mounting surface and corner radius r Corner radius (maximum) houlder height r r a r b H' H" b NH NH NH H' NH r b H'' NH r a NH r a NH NH N N Fig. 10 houlder for the rail Fig. 11 houlder for the ball slide N datum surface datum surface N N Maximum allowable speed An indication of the standard maximum allowable speed aiming at 10,000km operation with linear guide under normal conditions is shown in Table 20. However, the maximum allowable speed can be affected by accuracy of installation, operating temperature, external load, etc. If the operation is made exceeding the permissible distance and speed, please contact NK. Table 20 Maximum allowable speed eries ize NH N Handling Precautions Unit: m/min (1) Beating a slide or hitting it against an object may cause damage. (2) Operating temperature should be less than 80 C. If exceeding this temperature, the plastic parts might be damaged. (3) If using NK K1 TM, maximum temperature in use: C (momentary maximum temperature in use: 80 C). Do not leave NK K1 TM lubrication unit in organic solvent, white kerosene such as hexane, thinner which removes oil, and rust prevention oil which contains white kerosene. (4) Regarding the handling of interchangeable products. a) lides of interchangeable type are assembled on a provisional rail (an inserting tool) when it is delivered. b) When a slide is installed to the rail, make certain to use a provisional rail. c) Do not remove slides from the provisional rail, except installation to the rail. 9

10 Dimensions NH-AN (High-load type/standard, square type) NH-BN (uper-high-load type/long, square type) (1) Reference number for assembly NH ERIE NAME 1200 RAI ENGTH (MM) AN BA IDE HAPE CODE (refer to Fig 2 on page 4) C MATERIA/URFACE TREATMENT CODE (refer to Table 16 on page 8) C: pecial high carbon steel (NK standard) 2 NUMBER OF BA IDE PER RAI -** DEIGN ERIA NUMBER (Added to the reference number) P5 ACCURACY CODE (refer to page 5 and 6) 3 (refer to page 6) 0: 0 1: 1 3: 3 T: T : H: H (2) Reference number for interchangeable type NAH INTERCHANGEABE BA IDE ERIE CODE NAH: NH eries Interchangeable Ball lide AN BA IDE HAPE CODE (refer to Fig 2 on page 4) MATERIA CODE No code: pecial high carbon steel (NK standard) No code: Fine clearance : light preload H: Medium preload -K OPTION CODE -K: Equipped with NK K1 TM -K2: Two K1 TM ubrication Units -D: Double eals -P: Protector Plate Rail N1H INTERCHANGEABE RAI ERIE CODE N1H: NH eries Interchangeable Rail 1200 RAI ENGTH (MM) MATERIA CODE No code: pecial high carbon steel (NK standard) : light preload NH15AN NH15BN NH20AN NH20BN NH25AN NH25BN NHAN NHBN NH35AN NH35BN NH45AN NH45BN NH55AN NH55BN NH65AN NH65BN Assembly Height H E W 2 Width W ength Mounting hole Notes: 1) External appearance of stainless steel ball slides differs from those of carbon steel ball slides. Grease fitting Width Height B J M Pitch l 1 K T Hole size T 1 N W 1 H M Ø M M M M M M M M M Rc1/ M Rc1/ M Rc1/

11 Assembly (Preloaded assembly, interchangeable type) Front view of AN and BN types ide view of AN type ide view of BN type of interchangeable type AN and BN types AN type BN type Rail of interchangeable type M Rail Basic load rating Weight Pitch Mounting G Max. length Dynamic tatic tatic moment (N m) bolt hole 0max [km] [100km] C 0 M PO Rail F d D h (reference) ( ) for stainless C (N) C 100 (N) (N) M RO YO (One slide) (Two slides) (One slide) (Two slides) (kg) (kg/m) (1 800) (3 0) (3 0) (3 0) ) The basic load rating comply with the IO standard. (IO and IO ) C : the basic dynamic load rating for km rating fatigue life, C 100 : the basic dynamic load rating for 100 km rating fatigue life Unit: mm 11

12 NH-A (High-load type/standard, square low-profile type) NH-B (uper-high-load type/long, square low-profile type) (1) Reference number for assembly NH ERIE NAME 1200 RAI ENGTH (MM) A BA IDE HAPE CODE (refer to Fig 2 on page 4) C MATERIA/URFACE TREATMENT CODE (refer to Table 16 on page 8) C: pecial high carbon steel (NK standard) 2 NUMBER OF BA IDE PER RAI -** DEIGN ERIA NUMBER (Added to the reference number) P5 ACCURACY CODE (refer to page 5 and 6) 3 (refer to page 6) 0: 0 1: 1 3: 3 T: T : H: H (2) Reference number for interchangeable type NAH INTERCHANGEABE BA IDE ERIE CODE NAH: NH eries Interchangeable Ball lide A BA IDE HAPE CODE (refer to Fig 2 on page 4) MATERIA CODE No code: pecial high carbon steel (NK standard) No code: Fine clearance : light preload H: Medium preload -K OPTION CODE -K: Equipped with NK K1 TM -K2: Two K1 TM ubrication Units -D: Double eals -P: Protector Plate Rail N1H INTERCHANGEABE RAI ERIE CODE N1H: NH eries Interchangeable Rail 1200 RAI ENGTH (MM) MATERIA CODE No code: pecial high carbon steel (NK standard) : light preload NH25A NH25B NHA NHB NH35A NH35B NH45A NH45B NH55A NH55B Assembly Height H E W 2 Width W ength Mounting hole Notes: 1) External appearance of stainless steel ball slides differs from those of carbon steel ball slides. Grease fitting Width Height B J M Pitch l 1 K T Hole size T 1 N W 1 H M M M M M M M Rc1/ M Rc1/

13 Assembly (Preloaded assembly, interchangeable type) Front view of A and B types ide view of A type ide view of B type of interchangeable type A and B types A type B type Rail of interchangeable type M Rail Basic load rating Weight Pitch Mounting G Max. length Dynamic tatic tatic moment (N m) bolt hole 0max [km] [100km] C 0 M PO Rail F d D h (reference) ( ) for stainless C (N) C 100 (N) (N) M RO YO (One slide) (Two slides) (One slide) (Two slides) (kg) (kg/m) (3 0) (3 0) ) The basic load rating comply with the IO standard. (IO and IO ) C : the basic dynamic load rating for km rating fatigue life, C 100 : the basic dynamic load rating for 100 km rating fatigue life Unit: mm

14 NH-EM (High-load type/standard, flange type) NH-GM (uper-high-load type/long, flange type) (1) Reference number for assembly NH ERIE NAME 1200 RAI ENGTH (MM) EM BA IDE HAPE CODE (refer to Fig 2 on page 4) C MATERIA/URFACE TREATMENT CODE (refer to Table 16 on page 8) C: pecial high carbon steel (NK standard) 2 NUMBER OF BA IDE PER RAI -** DEIGN ERIA NUMBER (Added to the reference number) P5 ACCURACY CODE (refer to page 5 and 6) 3 (refer to page 6) 0: 0 1: 1 3: 3 T: T : H: H (2) Reference number for interchangeable type NAH INTERCHANGEABE BA IDE ERIE CODE NAH: NH eries Interchangeable Ball lide EM BA IDE HAPE CODE (refer to Fig 2 on page 4) MATERIA CODE No code: pecial high carbon steel (NK standard) No code: Fine clearance : light preload H: Medium preload -K OPTION CODE -K: Equipped with NK K1 TM -K2: Two K1 TM ubrication Units -D: Double eals -P: Protector Plate Rail N1H INTERCHANGEABE RAI ERIE CODE N1H: NH eries Interchangeable Rail 1200 RAI ENGTH (MM) MATERIA CODE No code: pecial high carbon steel (NK standard) : light preload NH15EM NH15GM NH20EM NH20GM NH25EM NH25GM NHEM NHGM NH35EM NH35GM NH45EM NH45GM NH55EM NH55GM NH65EM NH65GM Assembly Height Width H E W 2 W ength Mounting hole Notes: 1) Parenthesized dimensions are for items made of stainless steel. 2) External appearance of stainless steel ball slides differs from those of carbon steel ball slides. Grease fitting Width B J M Pitch l Q 2 1 K T Hole size T 1 N W 1 H 1 38 M Ø M M M (M ) 86 (12) M M (M ) 98 (15) M M M M Rc1/ M Rc1/ M Rc1/ Height 14

15 Assembly (Preloaded assembly, interchangeable type) Front view of EM and GM types ide view of EM type ide view of GM type MRO W B 4-M (φq 2 pilot drill) T MYO H K E W2 W1 of interchangeable type EM and GM types EM type GM type MRO W B 4-M (φq 2 pilot drill) H K T MYO E W2 W1 Rail of interchangeable type Rail Basic load rating Weight Pitch Mounting G Max. length Dynamic tatic tatic moment (N m) Rail bolt hole M PO M YO F d D h (reference) ( (kg/m) 0max ) for stainless [km] C (N) [100km] C 100 (N) C 0 (N) M RO (One slide) (Two slides) (One slide) (Two slides) (kg) (1 800) (3 0) (3 0) (3 0) ) The basic load rating comply with the IO standard. (IO and IO ) C : the basic dynamic load rating for km rating fatigue life, C 100 : the basic dynamic load rating for 100 km rating fatigue life Unit: mm 15

16 N-C (Medium-load type/short, square low-profile type) N-A (High-load type/standard, square low-profile type) (1) Reference number for assembly N ERIE NAME 1200 RAI ENGTH (MM) A BA IDE HAPE CODE (refer to Fig 2 on page 4) C MATERIA/URFACE TREATMENT CODE (refer to Table 16 on page 8) C: pecial high carbon steel (NK standard) 2 NUMBER OF BA IDE PER RAI ** DEIGN ERIA NUMBER (Added to the reference number) P5 ACCURACY CODE (refer to page 5 and 6) 3 (refer to page 6) 0: 0 1: 1 3: 3 T: T : H: H (2) Reference number for interchangeable type NA INTERCHANGEABE BA IDE ERIE CODE NA: N eries Interchangeable Ball lide A BA IDE HAPE CODE (refer to Fig 2 on page 4) MATERIA CODE No code: pecial high carbon steel (NK standard) No code: Fine clearance : light preload H: Medium preload -K OPTION CODE -K: Equipped with NK K1 TM -K2: Two K1 TM ubrication Units -D: Double eals -P: Protector Plate Rail N1 INTERCHANGEABE RAI ERIE CODE N1: N eries Interchangeable Rail 1200 RAI ENGTH (MM) RAI HAPE CODE : tandard T: The rail mounting bolt hole M4 for N15 MATERIA CODE No code: pecial high carbon steel (NK standard) : light preload N15C N15A N20C N20A N25C N25A NC NA N35C N35A Assembly Height Width H E W 2 W ength Mounting hole Notes: 1) External appearance of stainless steel ball slides differs from those of carbon steel ball slides. 2) The basic load rating comply with the IO standard. (IO and IO ) C : the basic dynamic load rating for km rating fatigue life, C 100 : the basic dynamic load rating for 100 km rating fatigue life Grease fitting Width Height B J M Pitch l 1 K T Hole size T 1 N W 1 H M Ø M M M M M M M M

17 Assembly (Preloaded assembly, interchangeable type) Front view of A and C types ide view of A type ide view of C type of interchangeable type A and C types A type C type Rail of interchangeable type M Rail Basic load rating Weight Pitch Mounting G Max. length Dynamic tatic tatic moment (N m) bolt hole 0max [km] [100km] C 0 M PO Rail F d D h (reference) ( ) for stainless C (N) C 100 (N) (N) M RO YO (One slide) (Two slides) (One slide) (Two slides) (kg) (kg/m) * (1 700) (3 0) (3 0) (3 0) (3 0) *) tandard rail mounting bolt hole for N15 is specified as hole for M3 (3.5 x 6 x 4.5). Please contact NK to request a different hole for M4 (4.5 x 7.5 x 5.3). Unit: mm 17

18 N-JM (Medium-load type/short, flange type) N-EM (High-load type/standard, flange type) (1) Reference number for assembly N ERIE NAME 1200 RAI ENGTH (MM) EM BA IDE HAPE CODE (refer to Fig 2 on page 4) C MATERIA/URFACE TREATMENT CODE (refer to Table 16 on page 8) C: pecial high carbon steel (NK standard) 2 NUMBER OF BA IDE PER RAI ** DEIGN ERIA NUMBER (Added to the reference number) P5 ACCURACY CODE (refer to page 5 and 6) 3 (refer to page 6) 0: 0 1: 1 3: 3 T: T : H: H (2) Reference number for interchangeable type NA INTERCHANGEABE BA IDE ERIE CODE NA: N eries Interchangeable Ball lide EM BA IDE HAPE CODE (refer to Fig 2 on page 4) MATERIA CODE No code: pecial high carbon steel (NK standard) No code: Fine clearance : light preload H: Medium preload -K OPTION CODE -K: Equipped with NK K1 TM -K2: Two K1 TM ubrication Units -D: Double eals -P: Protector Plate Rail N1 INTERCHANGEABE RAI ERIE CODE N1: N eries Interchangeable Rail 1200 RAI ENGTH (MM) RAI HAPE CODE : tandard T: The rail mounting bolt hole M4 for N15 MATERIA CODE No code: pecial high carbon steel (NK standard) : light preload N15JM N15EM N20JM N20EM N25JM N25EM NJM NEM N35JM N35EM Assembly Height Width H E W 2 W ength Mounting hole Notes: 1) External appearance of stainless steel ball slides differs from those of carbon steel ball slides. 2) Parenthesized dimensions are for items made of stainless steel. Grease fitting Width Height B J M Pitch l Q 2 1 K T Hole size T 1 N W 1 H M Ø M (M ) M M (M ) (12) M M (M ) 71 (15) M M (M ) 80 (15) M

19 MPO MRO W (N) B 1 J 4-M (φq2 pilot drill) T φd T1 MYO H K h Assembly (Preloaded assembly, interchangeable type) Front view of EM and JM types E ide view of EM W2 type W1 H1 φd G ide F view of JM type n F (G) MRO MPO 0 W B (N) 1 J 4-M (φq2 pilot drill) (N) 1 2-M (φq2 pilot drill) T φd T1 T1 MYO H K h E H1 φd W2 W1 F G n F (G) 0 of interchangeable type MRO T1 (N) 1 2-M (φq2 pilot drill) EM and JM types EM type JM type MPO W (N) (N) B 1 J 4-M (φq2 pilot drill) 1 2-M (φq2 pilot drill) T T1 T1 H K MYO E W2 W1 Rail of interchangeable type M Rail Basic load rating Weight Pitch Mounting G Max. length Dynamic tatic tatic moment (N m) bolt hole 0max [km] [100km] C 0 M PO Rail F d D h (reference) ( ) for stainless C (N) C 100 (N) (N) M RO YO (One slide) (Two slides) (One slide) (Two slides) (kg) (kg/m) * (1 700) (3 0) (3 0) (3 0) (3 0) ) The basic load rating comply with the IO standard. (IO and IO ) C : the basic dynamic load rating for km rating fatigue life, C 100 : the basic dynamic load rating for 100 km rating fatigue life *) tandard rail mounting bolt hole for N15 is specified as hole for M3 (3.5 x 6 x 4.5). Please contact NK to request a different hole for M4 (4.5 x 7.5 x 5.3). Unit: mm 19

20 Worldwide ales Offices NK td. Headquarters, Tokyo, Japan Asia Business trategic DivisionHeadquarters Industrial Machinery Bearings DivisionHeadquarters Automotive Division-Headquarters Needle Roller Bearings trategic Division-Headquarters Precision Machinery & Parts Division-Headquarters tel: tel: tel: tel: tel: Malaysia: NK Bearings (Malaysia) dn. Bhd. Kuala umpur NK Micro Precision (M) dn. Bhd. Malaysia Plant New ealand: NK New ealand td. Auckland Africa outh Africa: NK outh Africa (Pty) td. Johannesburg tel: Asia and Oceania Australia: NK Australia Pty. td. Melbourne Korea: NK Korea Co., td. eoul Changwon Plant tel: China: NK Hong Kong td. Hong Kong tel: Kunshan NK Co., td. Kunshan Plant tel: Changshu NK Needle Bearing Co., td. Jiangsu Plant tel: Guizhou H NK Bearings Co., td. Anshun Plant tel: NK teering ystems Dongguan Co., td. Dongguan Plant tel: hangjiagang NK Precision Machinery Co., td. Jiangsu Plant tel: Timken-NK Bearings (uzhou) Co., td. Jiangsu Plant tel: NK China Technology Center Jiangsu tel: NK (hanghai) Trading Co., td. hanghai tel: Beijing tel: Guangzhou tel: Anshun tel: Chengdu tel: henzhen tel: Changchun tel: NK (China) Investment Co., td. hanghai tel: India: Rane NK teering ystems td. Chennai NK td. India Branch Office Chennai Indonesia: PT. NK Bearings Manufacturing Indonesia Jakarta PT. NK Indonesia Jakarta tel: tel: tel: Philippines: NK Representative Office Makati City tel: tel: tel: tel: tel: tel: ingapore: NK International (ingapore) Pte td. ingapore tel: NK ingapore (Pte) td. ingapore tel: Taiwan: Taiwan NK Precision Co., td. Taipei tel: Thailand: NK Bearings (Thailand) Co., td. Bangkok tel: IAM NK teering ystems Co., td. Chachoengsao tel: ~3 NK Asia Pacific Technology Center (Thailand) Co., td. Chonburi tel: ~ Vietnam: NK Representative Office Hanoi France: NK France.A. Paris Germany: NK Deutschland GmbH Düsseldorf NK teering ystems Europe td. tuttgart Neuweg Fertigung GmbH Munderkingen Italy: NK Italia.p.A. Milano Industria Cuscinetti.p.A. Torino Plant tel: Poland: NK Polska p. z.o.o. Warsaw Branch tel: NK Iskra.A. Kielce tel: NK European Technology Center, Poland Office Kielce tel: pain: NK pain.a. Barcelona tel: Turkey: NK Rulmanlari Orta Dogu Tic. td ti tel: United Kingdom: NK Bearings Europe td. Peterlee Plant NK European Technology Centre Newark NK UK td. Newark NK teering ystems Europe td. Coventry tel: tel: tel: tel: North and outh America NK Americas, Inc. (American Headquarters) Ann Arbor tel: Argentina: NK Argentina R Buenos Aires tel: Brazil: NK Brasil tda. ão Paulo tel: tel: Canada: NK Canada Inc. Toronto tel: tel: Mexico: NK Rodamientos Mexicana,.A. de C.V. Mexico City tel: tel: Europe NK Europe td. (European Headquarters) Maidenhead, U.K. Netherlands: NK European Distribution Centre B.V. Tilburg tel: tel: tel: tel: tel: United tates of America: NK Corporation Ann Arbor NK American Technology Center Ann Arbor NK Precision America, Inc. Franklin NK teering ystems America, Inc. Bennington, Vermont NK atin America, Inc. Miami tel: tel: tel: tel: tel: tel: NK td. has a basic policy not to export any products or techology designated as controlled items by export-related laws. When exporting the products in this brochure, the laws of the exporting country must be observed. pecifications are subject to change without notice and without any obligation on the part of the manufacturer. Every care has been taken to ensure the accuracy of the data contained in this brochure, but no liability can be accepted for any loss or damage suffered through errors or omissions. We will gratefully acknowledge any additions or corrections. NH-N eries - Rev 1/AB/2M15. Printed in the UA NK The contents of this publication are the copyright of the publishers.

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