Dalian Pure Industrial Bearing Co.,Ltd. | Bearing, Bearing parts, Automobile & Railway Bearing, Slewing ring, slewing drive, Adapter sleeve, Roller Chain, Gear, Engineering machinery parts.
DALIAN PURE INDUSTRIAL BEARING CO.,LTD. | BEARING AND INDUSTRIAL PARTS SUPPLIER | CONSISTENT QUALITY + QUICK SUPPLYING

Bearing type

Boundary dimensions

Fixing holes

Basic load rating

weight

d

D

H

H1

C

d1

dn

dm

Inner ring

Outer ring

axial

radial

dynamic

static

dynamic

static

mm

d0

ds

Ts

qty

dL

qty

Ca

Coa

Cr

Cor

mm

mm

KN

kg

YRT50

50

126

30

20

10

105

63

116

5.6

9

4.2

10

5.6

12

38

158

28.5

49.5

1.6

YRT80

80

146

35

23.35

12

130

92

138

5.6

10

4.2

10

4.6

12

56

255

42.5

100

2.4

YRT100

100

185

38

25

12

160

112

170

5.6

10

5.4

16

5.6

15

76.5

415

47.5

120

4.1

YRT120

120

210

40

26

12

184

135

195

7

11

6.2

22

7

21

102

540

52

143

5.3

YRT150

150

240

40

26

12

214

165

225

7

11

6.2

34

7

33

112

630

56

170

6.2

YRT180

180

280

43

29

15

244

194

260

7

11

6.2

46

7

45

118

710

69.5

200

7.7

YRT200

200

300

45

30

15

274

215

285

7

11

6.2

46

7

45

120

765

81.5

220

9.7

YRT260

260

385

55

36.5

18

345

280

365

9.3

15

8.2

34

9.3

33

160

1060

93

290

18.3

YRT325

325

450

60

40

20

415

342

430

9.3

15

8.2

34

9.3

33

275

1930

120

345

25

YRT395

395

525

65

42.5

20

486

415

505

9.3

15

8.2

46

9.3

45

300

2280

186

655

33

YRT460

460

600

70

46

22

560

482

580

10

15

8.2

46

10

45

355

2800

200

765

45

YRT580

580

750

90

60

30

700

610

720

11.4

18

11

46

11.4

42

490

4250

228

965

89

YRT650

650

870

122

78

34

800

680

830

14

20

13

46

14

42

1040

8000

490

1800

170

YRT850

850

1095

124

80.5

37

1018

890

1055

18.5

26

17

57

18.5

54

1000

8650

455

1730

253

YRT950

950

1200

132

86

40

1130

990

1160

18.5

26

17

57

18.5

54

1290

11400

530

2040

312

YRT1030

1030

1300

145

92.5

40

1215

1075

1255

18.5

26

17

66

18.5

66

1380

12000

620

2650

375

YRT1200

1200

1490

164

108

52

1410

1240

1445

18.5

26

17

66

18.5

66

1435

12850

745

2800

450



Features:
YRT precision rotary table bearing is a kind of bearing fixed by a bidirectional thrust bearing and a centripetal-guided bearing. They can support radial loads, axial loads from both directions and tilting moments free from clearance and are particularly suitable for bearing arrangements with high requirements for running accuracy,like rotary tables, millings heads and reversible clamps.Due to the fixing holes in the bearing rings, the units are very easy to fit.
The bearings are radially and axially preloaded after fitting.

Sealing/Lubricant:
YRT bearings are supplied with seals. YRT bearings are greased by a lithium complex soap grease and can be lubricated via the outer ring and L-section ring.

Operating temperature:
YRT bearings are suitable for operating temperatures from 30℃ to 120℃

Design and safety guidelines:
Basic rating life:
Please contact us in relation to checking of the basic rating life .The speed ,load and operating duration must be given.

Static load safety factor:
The static load safety factor S0 indicates the security against impermissible permanent deformations in the bearing. It is determined as follows:
Static load safety factor :Cor Coa N
Basic static load rating according to dimension tables: For Foa N
Maximum static load on the radial or axial bearing.
Caution! In machine tools and similar areas of application, S0 should be >4

Limiting speeds:
The bearings allow the limiting speeds given in the dimension tables. The operating temperatures occurring are heavily dependent on the environmental conditions. Calculation is possible by means of a thermal balance analysis based on frictional torque data.

Frictional torque:
The bearing frictional torque MRL is influenced primarily by the viscosity and quantity of the lubricant and the bearing preload.
The lubricant viscosity and quantity are dependent on the lubricant grade and operating temperature. The bearing preload is dependent on the mounting fits, the geometrical accuracy of the adjacent parts, the temperature difference between the inner and outer ring, the screw tightening torque and the mounting situation.

Starting torque:
For YRT bearing, it must be taken into consideration that the frictional torque can increase by a factor of between 2 and 2.5 with increasing speed.

Accuracy of adjacent construction:
The adjacent construction should be produced in accordance with Figure and the tolerances must be in accordance with the tables starting on page. Any deviations will influence the bearing frictional torque ,running accuracy and running characteristics.

Legend to Figure:
1.Support over whole bearing height. It must be ensured that the means of support has adequate rigidity.
2.A precise fit is only necessary if radial support due to the load or a precise bearing position is required.
3.Note the bearing diameter D1 according to the dimension tables. Ensure that there is sufficient distance between the rotating bearing rings and the adjacent construction.
Geometrical and positional accuracy of the adjacent construction:

nominal shaft diameter
d
mm

Deviation
d

Roundness
Parallelism
Perpendicularity
t2,t2,t8,

over incl. for tolerance h5
µm
µm
50 80 0 -13 3
80 120 0 -15 4
120 150 0 -18 5
150 180 0 -18 5
180 250 0 -20 7
250 315 0 -23 8
315 400 0 -25 9
400 500 0 -27 10
500 630 0 -28 11
630 800 0 -32 12
800 1000 0 -36 14

 

nominal shaft diameter
D
mm

Deviation
D

Roundness
Parallelism
Perpendicularity
t2,t2,t8,

over incl. for tolerance zone h5
µm
µm
120 150 +18 -7 5
150 180 +18 -7 5
180 250 +22 -7 7
250 315 +25 -7 8
315 400 +29 -7 9
400 500 +33 -7 10
500 630 +34 -7 11
630 800 +38 -8 12
800 1000 +44 -12 14
1000 1250 +52 -14 16

Mounting dimensions H1、H2 

L-section ring without support ring:
For the case “L-section ring without support ring”, the bearing designation is :YRT
L-section ring with support ring:YRT bore diameter VSP
For the case “L-section ring with support ring”, the bearing designation is :YRT VSP
Caution! For bearing arrangements with a supported L-section ring , only bearings with the suffix VSP、EB or T52EA can be ordered. If the normal design is mounted with a supported L-section ring, there will be a considerable increase in the bearing frictional torque .The support ring should be at least twice as the shaft locating washer of the bearing.

Fitting:

Retaining screws secure the bearing components during transport, For easier centring of the bearing ,the screws should be loosened before fitting and either secured again or removed after fitting. Tighten the fixing screws in crosswise sequence by using a torque wrench in three stages to the specified tightening torque MA, rotating the bearing:
Stage 1 40% of MA
Stage 2 70% of MA
Stage 3 100% of MA
Observe the correct grade of the fixing screws.
Caution! Mounting forces must only be applied to the bearing ring to be fitted, never through the rolling elements. Bearing components must not be separated or interchanged during fitting and dismantling. If the bearing is unusually difficult to move ,loosen the fixing screws and tighten them again in steps with a crosswise sequence. This will eliminate any distortion. Bearings should only be fitted in accordance with ,Fitting and Maintenance Manual.


YRT Dimensional tolerances, mounting dimensions, axial and radial runout YRT

Dimensional tolerance Mounting dimensions Axial and radial
runout
Bore Outside
diameter
H1
mm
ΔH1s 
mm
Restr-
icted
ΔH1s 
mm
H1
mm
Restr-
icted
ΔH1s 
mm
Stan-
dart
µm
Restri-
cted
µm
d
mm
Δds 
mm
D
mm
ΔDs 
mm
50 -0.008 126 -0.011 20 ±0.125 ±0.025 10 ±0.02 2 1
80 -0.009 146 -0.011 23.35 ±0.15 ±0.025 11.7 ±0.02 3 1.5
100 -0.01 185 -0.015 25 ±0.175 ±0.025 13 ±0.02 3 1.5
120 -0.01 210 -0.015 26 ±0.175 ±0.03 14 ±0.02 3 1.5
150 -0.013 240 -0.015 26 ±0.175 ±0.03 14 ±0.02 3 1.5
180 -0.013 280 -0.018 29 ±0.175 ±0.03 14 ±0.025 4 2
200 -0.015 300 -0.018 30 ±0.175 ±0.04 15 ±0.025 4 2
260 -0.018 385 -0.02 36.5 ±0.2 ±0.05 18.5 ±0.025 6 3
325 -0.023 450 -0.023 40 ±0.2 ±0.05 20 ±0.025 6 3
395 -0.023 525 -0.028 42.5 ±0.2 ±0.05 22.5 ±0.025 6 3
460 -0.023 600 -0.028 46 ±0.225 ±0.06 24 ±0.03 6 53
580 -0.025 750 -0.035 60 ±0.25 ±0.075 30 ±0.03 10 53
650 -0.038 870 -0.05 78 ±0.25 ±0.1 44 ±0.03 10 53
852 -0.05 1095 -0.063 80.5 ±0.3 ±0.12 43.5 ±0.03 12 63
950 -0.05 1200 -0.063 86 ±0.3 ±0.12 46 ±0.03 12 63
1030 -0.063 1300 -0.08 92.5 ±0.3 ±0.15 52.5 ±0.03 12 63 

For rotating inner and outer ring,measured on fitted bearing, with ideal adjacent construction.
Special design,YRT only.
By agreement only for rotating outer ring.

Dimensional tolerance Mounting dimensions Axial and radial
runoutµm
Bore Outside
diameter
H1
mm
ΔH1s 
mm
H2 
mm
d
mm
Δds 
mm
D
mm
ΔDs 
mm
200 -0.015 300 -0.018 30 +0.04
-0.06
15 4
260 -0.018 385 -0.02 36.5 +0.05
-0.07
18.5 6
325 -0.023 450 -0.023 40 +0.06
-0.07
20 6
395 -0.023 525 -0.028 42.5 +0.06
-0.07
22.5 6
460 -0.023 600 -0.028 46 +0.07
-0.08
24 6