HMEC - Quality - Technical Data | Manufacturing & Devices
 
Technical Data
 

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 dmp Vdp Vdmp Kia Bs 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 Dmp VDp   VDmp Kea Cs 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

Tolerance Class ABEC3 
 
 Inner Ring
Tolerance in um.
d dmp Vdp Vdmp Kia Bs 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 Dmp VDp VDmp Kea Cs 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

Tolerance Class ABEC5 
 
 Inner Ring
Tolerance in um.
  d dmp Vdp 
Diameter Series		 Vdmp Kia Sd Sia Bs 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 Dmp VDp
Diameter Series		 VDmp Kea SD Sea Cs 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


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