Creep-Free BearingsTM

A new bearing series that is indispensable for drive units in equipment such as motors for general use. Prevents creep when used with rotating loads, plus offers a reusable housing and easy assembling.

New!

21

Creep-Free Bearings, which come with two O-rings mounted in the outer ring, help to prevent the occurrence of creep by restricting the amount of clearance between the outer ring and housing.No special machining is required; bearings can be used with the same housing as standard bearings.In creep limit load tests, the more housing clearance is reduced, the greater the improvement in creep prevention, due to the tension of the O-ring mounted in the outer ring.

Fig. 1 Structure of Creep-Free Bearings

0

100

200

300

400

500

600

700

0 5 10 15 20 25 30 35 40

Creep-Free Bearing

Conventional bearing (without O-ring)

The O-rings significantly help to prevent the occurrence of creep when fitted with loose housing tolerances. Also, since boundary dimensions are identical to standard bearings, the housing does not need to be reworked when replacing the bearing, contributing to reduced costs.

1. Structure and performance of Creep-Free Bearings

2. Features and applications of Creep-Free Bearings

O-rings

Washingmachines

Motorsfor general

use

Electricpowertools

Sewingmachines

Gearedmotors

Creep-Free Bearings

Pumpmotors

Fan motors

Cre

ep re

sist

ance

, NHousing clearance (diameter), μm

Fig. 2 Creep limit load test (example: 6204)

Features

Application examples

n Prevents creepO-rings help prevent creep.

n Reusable housingVery little abrasion occurs on the bore surface of the housing, making reuse possible.

n No special machining of the housing is required

Bearings can be replaced since boundary dimensions are identical to standard bearings.No reworking of the housing is required.

n Easy to assembleAssembly is easy since bearings can be fitted with a loose tolerance.

0

100

50

150

200

250

300

350

400

0 10 20 30 5040

620262046208

Fig. 3 Fit and insertion force

Housing fit clearance (diameter), μm

Inse

rtio

n fo

rce,

N0

100

50

150

200

250

0 10 20 30 5040

620262046208

Housing fit clearance (diameter), μm

Fig. 4 Fit and sliding force

Slid

ing

forc

e, N

lWhen oil or grease is applied to the outer diameter of the bearing, use a mineral oil or a synthetic hydrocarbon oil (NSK’s EA2, etc.).

lO-ring material is nitrile rubber (operating temperature range: –30 to 120°C) as a standard specification. Please contact NSK for use under special environments such as high temperatures.

Noteon mountingCreep-Free

Bearings Fig. 5 Housing shape and dimension

Chamfer angle15–30°

Chamfer dimension0.01D mm

Note on the product name “Creep-Free Bearings”: The term “free” should not be construed to mean that creep is nonexistent.

* Although recommended fits are H7 or G6, G6 is recommended when used under conditions that prioritize insertion under light pre-load. ** Low-contact seal available for seal type bearings. Contact NSK for details.

Table 1 Creep-Free Bearings List

3. Creep-Free Bearings

Bearing bore diameterd

mm

Bearing outer diameterD

mm

Bearing widthB

mm

Basic load ratings Recommended fits*

Bearing number

Cr (N) C0r (N) Basic number(Open type) Shield type Contact seal type** Non-contact seal type

10263035

89

11

4 5505 1008 100

1 9702 3903 450

H7orG6

600062006300

ZZ DDU VV

12283237

81012

5 1006 8009 700

2 3703 0504 200

600162016301

ZZ DDU VV

15323542

91113

5 6007 650

11 400

2 8303 7505 450

600262026302

ZZ DDU VV

17354047

101214

6 0009 550

13 600

3 2504 8006 650

600362036303

ZZ DDU VV

20424752

121415

9 40012 80015 900

5 0006 6007 900

600462046304

ZZ DDU VV

25475262

121517

10 10014 00020 600

5 8507 850

11 200

600562056305

ZZ DDU VV

30556272

131619

13 20019 50026 700

8 30011 30015 000

600662066306

ZZ DDU VV

35627280

141721

16 00025 70033 500

10 30015 30019 200

600762076307

ZZ DDU VV

40688090

151823

16 80029 10040 500

11 50017 90024 000

600862086308

ZZ DDU VV

457585

100

161925

20 90031 50053 000

15 20020 40032 000

600962096309

ZZ DDU VV

508090

110

162027

21 80035 00062 000

16 60023 20038 500

601062106310

ZZ DDU VV

5590

100120

182129

28 30043 50071 500

21 20029 30044 500

601162116311

ZZ DDU VV

6095

110130

182231

29 50052 50082 000

23 20036 00052 000

601262126312

ZZ DDU VV

65100120140

182333

30 50057 50092 500

25 20040 00060 000

601362136313

ZZ DDU VV

70110125150

202435

38 00062 000

104 000

31 00044 00068 000

601462146314

ZZ DDU VV

75 115130

2025

39 50066 000

33 50049 500

60156215 ZZ DDU VV

80 125140

2226

47 50072 500

40 00053 000

60166216 ZZ DDU VV

85 130150

2228

49 50084 000

43 00062 000

60176217 ZZ DDU VV

90 140 24 58 000 50 000 6018 ZZ DDU VV95 145 24 60 500 54 000 6019 ZZ DDU VV

100 150 24 60 000 54 000 6020 ZZ DDU VV

CAT. No.E1224b 2015 B-9 Printed in Japan©NSK Ltd. First edition published in 2007

For the latest information, please refer to the NSK website.

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