The accuracy of ZXZC deep groove ball bearings (air conditioner motor bearing) are divided into four grades of tolerances with national standard GB/T307. 1 which compared with the ISO and AFBMA standard.etc is in the following table.
Standard |
Tolerrance class |
GB/T307.1 |
PO |
P6 |
P5 |
P4 |
IS0492 |
C LASSO |
CLASS6 |
CLASS5 |
CLASS4 |
AFBMA STD.20 |
ABEC1 |
ABEC3 |
ABEC5 |
ABEC7 |
The rings and ball of ZXZC deep groove ball bearings aremade of refined high chrome bearings steel (AISI52100) of staingless stee(AlSI440C).The cages are made of lowcarbon steel Spcc or Nylon A3HC5 Other materials is available for specific use in order.
ZXZC deep groove ball bearings feature low vibration and noise.Bearings conforming to standard EMQ are supplied for customers.
Bearings are filled with oil or grease when they are delivered.These bearings are suitable use at working temperature of -50℃ to 200℃ . Specific brands of oil or grease available which is stipulated in the contract.
Manufacturer |
Brand |
Viscosity |
Base oil |
Drop point °C |
Worked
penetration |
Operating temperature range °C |
Manufacturer |
Brand |
Thickener |
Base oil |
Droppoing
point |
- |
Usage
temperature range |
Kyodo yushi |
Multemp PS2 |
Lithium soap |
Diester oil + mineral oil |
190 |
275 |
-60°C~130°C |
Multemp SRL |
Lithium soap |
Polylester + diester oil |
190 |
250 |
-50°C~150°C |
Multemp SB-M |
Diurea |
Synthetic hydrocarbon oil |
260 |
220 |
-40°C~200°C |
Raremax Super |
Urea |
Mineral oil |
253 |
260 |
-40°C-200°C |
Yiping
Advanced
Lubricant
Company |
7014 |
- |
- |
250 |
57-72 |
-60°C-200°C |
7014-1 |
- |
- |
280 |
62-75 |
-40°C-200°C |
7016 |
- |
- |
260 |
60-75 |
-60oC~200oC |
Kluber |
NB52 |
- |
- |
- |
- |
-50°C~120°C |
BQ72-72 |
Polyurea |
Ester oil |
>250 |
250-280 |
-45°C~180°C |
Shell |
ALVANIA RLQ2 |
Lithium |
Ester oil |
195 |
266 |
-25°C~120°C |
Mobil oil |
MOBILGREASE HP222 |
Lithium |
- |
281 |
280 |
-29°C~177°C |
MOBILGREASE 28 |
Bentonite |
Synthetic hydrocarbon oil |
>260 |
280 |
-60°C~180°C |
Chevron |
Chevron SRL-2 |
Polyurea |
Mineral |
243 |
260 |
-30°C~175°C |
The radial internal clearcnces of ZXZC deep groove ball bearings are according with National standard GB/T4604(which is adopted ISO5753 equivalently) Dividing into five groups as shown in the following table.
Aperture(mm) |
Group2 |
Normal Group |
Group3 |
Group4 |
Group5 |
Over |
To |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
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 |
The radial internal clearance of ZXZC deep groove ball bearings are also adopted Natilonal standard NSK.ETC is in the following table.
Clearance mark |
MCI |
MC2 |
MC3 |
MC4 |
MC5 |
MC6 |
Clearance |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
0 |
5 |
3 |
8 |
5 |
10 |
8 |
13 |
13 |
20 |
20 |
28 |