Page 2 - esp-100427a

Line-up of Random-matching Ball slide model

Series Size Ball slide model Accuracy Preload Model Cross-section shape Ball slide length
LH AN
SH 15 AN AL BN BL CL EM GM JM Precision grade PH Normal grade PC Medium preload ZH Slight preload ZZ AL
LS 20
SS 25 BN
30 BL
35
45 CL
15
20 EM
25
30 GM
35
45 JM
15
20
25
30
35
15
20
25
30
35

Accuracy Preload and rigidity

Running parallelism of PH grade is equivalent to P5 grade of NSK matched rail / ball slide assembly. The preload can be specified as ZH or ZZ.
Accuracy grade (running parallelism) can be specified as PH or PC.
Assembly accuracy of PH grade is shown below. Fig. 2 Compression rigidity of LH35AN

Fig. 1 Running parallelism Table 1 Accuracy standard 1˜ˆÌ \ –“ -ˆ} ÌÊ«Àiœ>`Ê<<

œÀ“>Ê}À>`iÊ*
-ˆâi iÜÊi`ˆÕ“Ê«Àiœ>`Ê<

iÜÊ*ÀiVˆÃˆœ˜Ê}À>`iÊ*

­iµÕˆÛ>i˜ÌÊÌœÊ -Ê*xÊ}À>`i®
Running parallelism (μm) VVÕÀ>VÞ
Deformation (μm)V >À>VÌiÀˆÃ̈VÃ

œÕ˜Ìˆ˜} œÜ>˜Vi
iˆ} ÌÊ 6>Àˆ>̈œ˜

œÕ˜Ìˆ˜}Ê܈`Ì œÜ>˜Vi

7ÓʜÀÊ7Î 6>Àˆ>̈œ˜

,՘˜ˆ˜}Ê«>À>iˆÃ“ ,iviÀÊ̜ʈ}°Ê£

œÌi\ £®Ê6>Àˆ>̈œ˜Êœ˜ÊÌ iÊÃ>“iÊÀ>ˆ Ó®Ê6>Àˆ>̈œ˜Êœ˜Ê“Տ̈«iÊÀ>ˆÃ

Load (N)

Rail length (mm) Table 2 Preload

Unit μ

Part number Series Size Slight preload ZZ Medium preload ZH
LH
15 -4 0 -8 -3.5
SH
œÀÊÀ>ˆÊœ˜Þ LS 20 -5 0 -9 -3.5
SS
Example : 25 -5 0 -11 -5.5

30 -7 0 -13 -6

Series L1H: LH, SH Series Preload Z : Slight preload 35 -7 0 -14 -7
L1S: LS, SS Series (Common rail for slight or medium preload)
Accuracy grade PH: Precision grade 45 -7 0 -17 -9
Size
Rail length (mm) PC: Normal grade 15 -4 0 -8 -3.5
Shape L : Standard NSK control number
Butting rail specification N: Non-butting, L: Butting 20 -5 0 -9 -3.5
œÀÊL>Êψ`iʜ˜Þ Material C : Carbon steel
25 -5 0 -11 -5.5
Example : NSK control number
Preload Z: Slight preload, H: Medium preload 30 -7 0 -13 -6
Series Shape/height AN, AL, BN, BL, CL, EM, GM, JM
LAH : LH Series 35 -7 0 -14 -7
SAH : SH Series Size
LAS : L S Series 45 -7 0 -17 -9
SAS : SS Series
15 -4 0 -6.5 -2
œÀÊ>ÃÃi“LÞ
20 -4 0 -7.5 -3
Example :
25 -5 0 -9 -3.5

30 -5 0 -10 -4.5

35 -6 0 -12 -5

Series LH, SH, LS, SS Preload Z : Slight preload 15 -4 0
Size H : Medium preload
Rail length (mm) 20 -4 0
Shape/height AN, AL, BN, BL, CL, EM, GM, JM Accuracy grade PH: Precision grade
Material C : Carbon steel PC: Normal grade 25 -5 0

NSK control number 30 -5 0
Number of ball slides per rail
35 -6 0

CAT. No.ESP-100427a 2011 X-8 Printed in Japan©NSK Ltd. 2010