Bearing Material
High carbon chrome bearing steel (Gcr15) is the standard material for bearing rings & rolling elements, following is its chemical composition. Also carbon steel & stainless steel will be used upon request.
CHEMICAL COMPOSITION OF BEARING STEEL
steel No. | Symbol | Chemical Composition (Wt%) | |||||
Gcr15 | AISI 52100 | C | Cr | Si | Mn | P | S |
0.95-1.05 | 1.30-1.65 | 0.15-0.35 | 0.2-0.4 | <0.027 | <0.02 |
THE CONTRAST OF GCR15 OF EACH COUNTRY
China | ISO | USA | Japan | Germany | France | Sweden |
GB | 683/xv11 | AISI | JIS | DIN | NF | / |
Gcr15 | / | 52100 | SUJ2 | 100Cr6 | 100C6 | SKF3 |
CAGES
In general, cages are pressed steel ribbon cages & pressed steel snap cages. For extra-high speed application, synthetic-resin, stainless steel, nylons will be used upon request.
SEALS & SHIELDS
SPCC are mainly used for shields, also carbon steel & stainless steel can be used. Buna nitrile rubber is standard sealing material we use, while fluorocarbon, silicone, and teflon seals are commonly specified for high temperatures.
LUBRICATION
Different types of greases can be supplies for shielded & sealed bearing and oil for open bearings.
Tolerance Class ABEC1
Inner Ring | |||||||||||
Tolerance in um. | |||||||||||
d | ![]() |
Vdp | Vdmp | Kia | ![]() |
VBs | |||||
Diameter Series | |||||||||||
mm | 9 | 0,1 | 2,3,4 | ||||||||
over | incl. | high | low | max. | max. | max. | high | low | max. | ||
0.6 | 2.5 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -40 | 12 |
2.5 | 10 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -120 | 15 |
10 | 18 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -120 | 20 |
18 | 30 | 0 | -10 | 13 | 10 | 8 | 8 | 13 | 0 | -120 | 20 |
30 | 50 | 0 | -12 | 15 | 12 | 9 | 9 | 15 | 0 | -120 | 20 |
50 | 80 | 0 | -15 | 19 | 19 | 11 | 11 | 20 | 0 | -150 | 25 |
80 | 120 | 0 | -20 | 25 | 25 | 15 | 15 | 25 | 0 | -200 | 25 |
Outer Ring | ||||||||||||
Tolerance in um. | ||||||||||||
D | ![]() |
VDp | VDmp | Kea | ![]() |
VCs | ||||||
Open Bearings | Capped Brgs. | |||||||||||
Diameter Series | ||||||||||||
mm | 9 | 0,1 | 2,3,4 | 2,3,4 | ||||||||
over | incl. | high | low | max. | max. | max. | high | low | max. | |||
2.5 | 6 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 15 | Identical to Bs and VBs of inner ring of same bearing | ||
6 | 18 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 15 | |||
18 | 30 | 0 | -9 | 12 | 9 | 7 | 12 | 7 | 15 | |||
30 | 50 | 0 | -11 | 11 | 11 | 8 | 16 | 8 | 20 | |||
50 | 80 | 0 | -13 | 16 | 13 | 10 | 20 | 10 | 25 | |||
80 | 120 | 0 | -15 | 19 | 19 | 11 | 26 | 11 | 35 | |||
120 | 150 | 0 | -18 | 23 | 23 | 14 | 30 | 14 | 40 |
Inner Ring | |||||||||||
Tolerance in um. | |||||||||||
d | ![]() |
Vdp | Vdmp | Kia | ![]() |
VBs | |||||
Diameter Series | |||||||||||
mm | 9 | 0,1 | 2,3,4 | ||||||||
over | incl. | high | low | max. | max. | max. | high | low | max. | ||
0.6 | 2.5 | 0 | -7 | 9 | 7 | 5 | 5 | 5 | 0 | -40 | 12 |
2.5 | 10 | 0 | -7 | 9 | 7 | 5 | 5 | 6 | 0 | -120 | 15 |
10 | 18 | 0 | -7 | 9 | 7 | 5 | 5 | 7 | 0 | -120 | 20 |
18 | 30 | 0 | -8 | 10 | 8 | 6 | 6 | 8 | 0 | -120 | 20 |
30 | 50 | 0 | -10 | 13 | 10 | 8 | 8 | 10 | 0 | -120 | 20 |
50 | 80 | 0 | -12 | 15 | 15 | 9 | 9 | 10 | 0 | -150 | 25 |
80 | 120 | 0 | -15 | 19 | 19 | 11 | 11 | 13 | 0 | -200 | 25 |
Outer Ring | ||||||||||||
Tolerance in um. | ||||||||||||
D | ![]() |
VDp | VDmp | Kea | ![]() |
VCs | ||||||
Open Bearings | Capped Brgs. |
|||||||||||
Diameter Series | ||||||||||||
mm | 9 | 0,1 | 2,3,4 | 2,3,4 | ||||||||
over | incl. | high | low | max. | max. | max. | high | low | max. | |||
2.5 | 6 | 0 | -7 | 9 | 7 | 5 | 9 | 5 | 8 | Identical to Bs and VBs of inner ring of same bearing | ||
6 | 18 | 0 | -7 | 9 | 7 | 5 | 9 | 5 | 8 | |||
18 | 30 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 9 | |||
30 | 50 | 0 | -9 | 11 | 9 | 7 | 13 | 7 | 10 | |||
50 | 80 | 0 | -11 | 14 | 11 | 8 | 16 | 8 | 13 | |||
80 | 120 | 0 | -13 | 16 | 16 | 10 | 20 | 10 | 18 | |||
120 | 150 | 0 | -15 | 19 | 19 | 11 | 25 | 11 | 20 |
Inner Ring | ||||||||||||
Tolerance in um. | ||||||||||||
d | ![]() |
Vdp Diameter Series |
Vdmp | Kia | Sd | Sia | ![]() |
VBs | ||||
mm | 9 | 0,1,2,3,4 | ||||||||||
over | incl. | high | low | max | max. | max. | high | low | max. | |||
0.6 | 2.5 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -40 | 5 |
2.5 | 10 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -120 | 5 |
10 | 18 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -120 | 5 |
18 | 30 | 0 | -6 | 6 | 5 | 3 | 4 | 8 | 8 | 0 | -120 | 5 |
30 | 50 | 0 | -8 | 8 | 6 | 4 | 5 | 8 | 8 | 0 | -120 | 5 |
50 | 80 | 0 | -9 | 9 | 7 | 5 | 5 | 8 | 8 | 0 | -150 | 6 |
80 | 120 | 0 | -10 | 10 | 8 | 5 | 6 | 9 | 9 | 0 | -200 | 7 |
Outer Ring | ||||||||||||
Tolerance in um. | ||||||||||||
D | ![]() |
VDp Diameter Series |
VDmp | Kea | SD | Sea | ![]() |
VCs | ||||
mm | 9 | 0,1,2,3,4 | ||||||||||
over | incl. | high | low | max | max. | max. | high | low | max. | |||
2.5 | 6 | 0 | -5 | 5 | 4 | 3 | 5 | 8 | 8 | Identical to Bs and VBs of Inner ring of same bearing | 5 | |
6 | 18 | 0 | -5 | 5 | 4 | 3 | 5 | 8 | 8 | 5 | ||
18 | 30 | 0 | -6 | 5 | 5 | 3 | 6 | 8 | 8 | 5 | ||
30 | 50 | 0 | -7 | 7 | 5 | 4 | 7 | 8 | 8 | 5 | ||
50 | 80 | 0 | -9 | 9 | 7 | 5 | 8 | 8 | 10 | 6 | ||
80 | 120 | 0 | -10 | 10 | 8 | 5 | 10 | 9 | 11 | 8 | ||
120 | 150 | 0 | -11 | 11 | 8 | 6 | 11 | 10 | 13 | 8 |
Radial Clearance The radial clearance of our bearings can be classified into C2, C0, C3, C4 & C5 according to customer’s request. Table of Radial Clearance (um) |
Bore Diameter | C2 | C0 | C3 | C4 | C5 | ||||||
over | to | max | min | max | min | max | min | max | min | max | min |
2.5 | 6 | 0 | 7 | 2 | 13 | 8 | 23 | – | – | – | – |
6 | 10 | 0 | 7 | 2 | 13 | 8 | 23 | 14 | 29 | 20 | 37 |
10 | 18 | 0 | 9 | 3 | 18 | 11 | 25 | 18 | 33 | 25 | 45 |
18 | 24 | 0 | 10 | 5 | 20 | 13 | 28 | 20 | 36 | 28 | 48 |
24 | 30 | 1 | 11 | 5 | 20 | 13 | 28 | 23 | 41 | 30 | 53 |
30 | 40 | 1 | 11 | 6 | 20 | 15 | 33 | 28 | 46 | 40 | 64 |
Note:C2 clearance only for bearings over ABEC-3 accuracy. |
Vibration
The vibration and noise of bearings are classified in four classes as Z1, Z2, Z3 and Z4. It is measured by the instrument of SO910-1.For special requirement, it is measured by BVT-1 and classified as V1, V2 and V3. The data are shown in below tables. different vibration & noise requirement should be mentioned in order. |
TOLERANCE DATA FOR VIBRATION OF SINGLE BEARING
Tolerance in um/s
|
||||||||||||
d |
V
|
V1
|
V2
|
V3
|
||||||||
mm | Low | Medium | High | Low | Medium | High | Low | Medium | High | Low | Medium | High |
Brand | Brand | Brand | Brand | Brand | Brand | Brand | Brand | Brand | Brand | Brand | Brand | |
5 | 110 | 72 | 60 | 90 | 60 | 50 | 58 | 36 | 30 | 35 | 21 | 18 |
6 | 110 | 72 | 60 | 90 | 60 | 50 | 58 | 36 | 30 | 35 | 21 | 18 |
7 | 130 | 96 | 80 | 110 | 80 | 65 | 72 | 48 | 40 | 44 | 28 | 24 |
8 | 130 | 96 | 80 | 110 | 80 | 65 | 72 | 48 | 40 | 44 | 28 | 24 |
9 | 130 | 96 | 80 | 110 | 80 | 65 | 72 | 48 | 40 | 44 | 28 | 24 |
10 | 160 | 120 | 100 | 140 | 100 | 85 | 90 | 60 | 50 | 55 | 35 | 30 |
12 | 160 | 120 | 100 | 140 | 100 | 85 | 90 | 60 | 50 | 55 | 35 | 30 |
15 | 210 | 150 | 120 | 180 | 130 | 100 | 110 | 78 | 60 | 65 | 46 | 35 |
17 | 210 | 150 | 120 | 180 | 130 | 100 | 110 | 78 | 60 | 65 | 46 | 35 |
20 | 260 | 190 | 150 | 220 | 160 | 125 | 130 | 100 | 75 | 80 | 60 | 45 |
22 | 260 | 190 | 150 | 220 | 160 | 125 | 130 | 100 | 75 | 80 | 60 | 45 |
25 | 260 | 190 | 150 | 220 | 160 | 125 | 130 | 100 | 75 | 80 | 60 | 45 |
28 | 260 | 190 | 150 | 220 | 160 | 125 | 130 | 100 | 75 | 80 | 60 | 45 |
30 | 300 | 240 | 190 | 250 | 200 | 160 | 150 | 120 | 100 | 90 | 75 | 60 |
32 | 300 | 240 | 190 | 250 | 200 | 160 | 150 | 120 | 100 | 90 | 75 | 60 |
35 | 300 | 240 | 190 | 250 | 200 | 160 | 150 | 120 | 100 | 90 | 75 | 60 |
40 | 360 | 300 | 260 | 300 | 250 | 220 | 180 | 150 | 130 | 110 | 90 | 80 |
45 | 360 | 300 | 260 | 300 | 250 | 220 | 180 | 150 | 130 | 110 | 90 | 80 |
50 | 420 | 320 | 320 | 350 | 270 | 270 | 210 | 160 | 160 | 125 | 100 | 100 |
55 | 420 | 360 | 360 | 350 | 300 | 300 | 210 | 180 | 180 | 125 | 110 | 110 |
MAXIMUM VIBRATION ACCELERATION OF SINGLE BEARING
Tolerance in dB
|
||||||||||||
d | Diameter Series (0) | Diameter Series (2) | Diameter Series (3) | |||||||||
mm | Z | Z1 | Z2 | Z3 | Z | Z1 | Z2 | Z3 | Z | Z1 | Z2 | Z3 |
3 | 35 | 34 | 32 | 28 | 36 | 35 | 32 | 30 | 37 | 36 | 33 | 31 |
4 | 35 | 34 | 32 | 28 | 36 | 35 | 32 | 30 | 37 | 36 | 33 | 31 |
5 | 37 | 36 | 34 | 30 | 38 | 37 | 34 | 32 | 39 | 37 | 35 | 33 |
6 | 37 | 36 | 34 | 30 | 38 | 37 | 34 | 32 | 39 | 37 | 35 | 33 |
7 | 39 | 38 | 35 | 31 | 40 | 38 | 36 | 34 | – | – | – | – |
8 | 39 | 38 | 35 | 31 | 40 | 38 | 36 | 34 | – | – | – | – |
9 | 41 | 40 | 36 | 32 | 42 | 40 | 37 | 35 | – | – | – | – |
10 | 43 | 42 | 38 | 33 | 44 | 42 | 39 | 35 | 46 | 44 | 40 | 37 |
12 | 44 | 43 | 39 | 34 | 45 | 43 | 39 | 35 | 47 | 45 | 40 | 37 |
15 | 45 | 44 | 40 | 35 | 46 | 44 | 41 | 36 | 48 | 46 | 42 | 38 |
17 | 46 | 44 | 40 | 35 | 47 | 45 | 41 | 36 | 49 | 47 | 42 | 38 |
20 | 47 | 45 | 41 | 36 | 48 | 46 | 42 | 38 | 50 | 48 | 43 | 39 |
22 | 47 | 45 | 41 | 36 | 48 | 46 | 42 | 38 | 50 | 48 | 43 | 39 |
25 | 48 | 46 | 42 | 38 | 49 | 47 | 43 | 40 | 51 | 49 | 44 | 41 |
28 | 49 | 47 | 43 | 39 | 50 | 48 | 44 | 41 | 52 | 50 | 45 | 42 |
30 | 49 | 47 | 43 | 39 | 50 | 48 | 44 | 41 | 52 | 50 | 45 | 42 |
32 | 50 | 48 | 44 | 40 | 51 | 49 | 45 | 42 | 53 | 51 | 46 | 43 |
35 | 51 | 49 | 45 | 41 | 52 | 50 | 46 | 43 | 54 | 52 | 47 | 44 |
40 | 53 | 51 | 46 | 42 | 54 | 52 | 47 | 44 | 56 | 54 | 49 | 45 |
45 | 55 | 53 | 48 | 45 | 56 | 54 | 49 | 46 | 58 | 56 | 51 | 47 |
50 | 57 | 54 | 50 | 47 | 58 | 55 | 51 | 48 | 60 | 57 | 53 | 49 |
55 | 59 | 56 | 52 | 49 | 60 | 57 | 53 | 50 | 62 | 59 | 54 | 51 |
lubrication We can fill different No. or brand lubricating oil or grease according to the requirements of clients. |
Grease Brand | Designation | Dropping Temp. oC | Penetration at 25oC | Working Temp. oC | Remarks |
Shell | Alivania RL2 | 185 | 265-295 | -35-120 |
General Usage
|
Alivania RL3 | 185 | 220-250 | -35-135 | ||
Alivania RA | 180 | 250-275 | -25-100 | ||
Alivania EP1 | 180 | 310-340 | -25-110 | ||
Alivania EP2 | 185 | 265-295 | -25-110 | ||
Darina 2 | 250 | 265-295 | -25-150 | Hot Environment | |
Darina EP2 | 250 | 265-295 | -25-150 | ||
Dolium R2 | 250 | 265-295 | -35-150 | Anti-Corrosion | |
Esso | Andok C | 260 | 190-210 | -30-120 |
General Usage
|
Andok 260 | 190 | 204-260 | -40-120 | ||
Beacon 325 | 190 | 255-280 | -54-120 | Low Temperature | |
Chevron | SRI-2 | 240 | 255-280 | -30-120 | Water Proofing |
Mobil | Moilux 2 | 190 | 265-290 | -10-110 |
General Usage
|
Mobil 22 | 192 | 260-274 | -40-120 | ||
Mobil 28 | 260 | 265-295 | -55-175 |
Hot Environment
|
|
Mobil 48 | 260 | 240-270 | -60-170 | ||
Kluber | Isoflex LDS 18 | 190 | 255-280 | -50-110 |
Low Temperature
|
Isoflex NBU 15 | 250 | 255-280 | -30-120 | General Usage | |
Kyodo Yushi | Multemp SRL | 185 | 225-245 | -40-145 | Low Temperature |
Multemp PS2 | 190 | 250-275 | -50-110 | ||
Multemp SC-A | 260 | 255-280 | 0-160 | Hot Environment | |
Multemp ET150 | 260 | 255-280 | -10-160 | ||
China Hangu | Hangu 2 | 198 | 265-295 | -10-130 | Reduce Noise |