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NSK Linear Guides™ Miniature PU Series/PE Series

(3) Reference number for rail of random-matching type

Example: P1U 15 0470 R K N 88 PC T

Random-matching rail series code Preload code T: Fine clearance (ZT)
P1U: PU Series random-matching rail Accuracy code PC: Normal
P1E: PE Series random-matching rail
Design serial number
Size
Butting speci cation (8) N: non-butting rails, L: Butting speci cation
Rail length (mm)
Rail shape code Material/surface treatment K: Stainless steel
S: PU09·12, R: PU05·15 PE05·07·09·12, P: PE15 H: Stainless steel + surface treatment

(✽) Please consult NSK for butting rail specification.

3 Accuracy standard

We offer the following accuracy grades: Super precision grade P4, High precision grade P5, Precision grade P6,
and Normal grade PN for preloaded assembly type, and Normal grade PC for random-matching type.

Table 1 Tolerance of preloaded assembly Unit: μm Table 3 Running parallelism of ball slide Unit: μm

Accuracy grade Super High Precision Normal Accuracy grade Preloaded assembly type Random-matching
precision precision grade grade Rail length (mm) P4 P5 P6 PN type
Characteristics PC
Mounting height H P4 P5 P6 PN over or less
Variation of H ±10 ±15 ±20 ±40
(All ball slides on a set of rails) 50 2 2 4.5 6 6
Mounting width W2 or W3 5 7 15 25
V(AalrlibataiollnsloidfeWs 2oonrrWefe3rence rail) 50 – 80 2 356 6
Running parallelism of surface C
to surface A ±15 ±20 ±30 ±50 80 – 125 2 3.5 5.5 6.5 6.5
Running parallelism of surface D 7 10 20 20
to surface B 125 – 200 2 467 7

200 – 250 2.5 5 7 8 8

250 – 315 2.5 5 8 9 9

Shown in Table 3, Fig. 3, Fig. 4 315 – 400 3 6 9 11 11

400 – 500 3 6 10 12 12

500 – 630 3.5 7 12 14 14

630 – 800 4.5 8 14 16 16

Table 2 Tolerance of random-matching type: 800 – 1 000 5 9 16 18 18
Normal grade PC
Unit: μm 1 000 – 1 250 6 10 17 20 20
Accuracy grade Normal grade

Characteristics PC
Mounting height H ±20
Variation of mounting height H
15➀
Mounting width W2 or W3 30➁
Variation of mounting width W2 or W3 ±20
Running parallelism of surface C to surface A 20
Running parallelism of surface D to surface B
➀Variation on the same rail Shown in Table 3,
➁Variation on multiple rails Fig. 3, Fig. 4

C DC D C DC D

HH HH

A W2A W2 A AW3 W3
BB
BB
Fig. 3 A ssembled accuracy
Mounting width W2 Fig. 4 Assembled accuracy
Mounting width W3

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