Refined chrome bearing stell GCr15-SAE 52100,Stainless steel 9Cr18-AISI 440C. |
The radial clearance is divided into 5 groups in accordance with national standard,which is adopted from ISO5753 equivalently.
Bore diameter dmm |
Group2 |
Group0 |
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 |
|
NB miniature bearings are filled with oil or grease when they are delivered,those bearings are suitable used at working temperature of -30℃ to 150℃.Specific brands of oil or grease are available which is stipulated at the time of oredr. |
The colerance class is divided into 4 grades in accordance with national standard,which is adopted from ISO492 equivalently.
Standard |
Tolerance class |
NH(GB/T307.1) |
P0 |
P6 |
P5 |
P4 |
ISO490 |
0 |
6 |
5 |
4 |
ANSI |
ABEC1 |
ABEC3 |
ABEC5 |
ABEC7 |
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NB miniature bearings feature low vibration and noise.
SBG electric motor quality miniature bearings conforming ot standard EMQ are supplied for OEM.
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NB miniature bearings are packed in plastic tubes or polythene bags,and then in carton boxes.Industrial packing is also available.Special requirements should be mentioned in order.
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