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Technical Details
The
standard K Z. bearing components like outer and inner rings balls
and rollers material is high carbon chromium Gcr 15 Bearing
steel which provide uniform high hardness, toughness and abrasion
resistance. Chemical compositions are shown in the following
table:
MATERIALS
1. Steel for Outer and Inner Rings or Rollers:
| Material |
Symbol |
Chemical Composition% |
Rockwell Hardness C Scale |
| High
Carbon |
Gcr
15 |
C |
SI |
Mn |
P |
S |
Cr |
Mo |
62+3HRC |
| Chromium |
0.95 |
0.15 |
0.50 |
005 |
0.025 |
1.30 |
---- |
| Bearing Steel |
1.10 |
0.35 |
Max. |
Max. |
Max. |
1.60 |
---- |
2.
Steel for Retainers:
The Standards Cage material is Low Carbon Cold Rolled Steel.
CRCA Steel
| C |
si |
Mn |
P |
S |
| 0.12 |
O
|
0.5 |
0.04 |
0.05 |
| Max. |
|
Max.
|
Max. |
Max.
|
BOUNDARY DIMENSIONS
| International Standard Organisation (ISO)
has set up the international standards for the
bearing industry. The standardisation of boundary
dimensions and tolerance allows the bearing manufacturer
to utilize the most modern production machines
and quality control techniques in producing high
quality bearing at an economical price level.
The KGB generally, follows the metric measures
for it’s manufacturing program.
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|
SURFACE FINISH
KGB has the equipment’s for super finishing of track
of the bearing rings as well as outer diameter of the rollers.
Each bearing component i.e., inner and outer Rings and rollers
are super finished for the maximum achievement of bearing
life.
TESTING FACILITIES
At KGB Quality is an integral part of our culture and every
effort is made to ensure that customer get value for money.
The company is having skilled employees at all levels to
bring their expertise in to the manufacturing of quality
bearings.
KGB also comprised with the latest equipment’s like
surface finish measuring, Roundness Measuring and various
electronic gauging equipment’s for checking geometrical
parameters such as concentricity, parallelism roundness.
Tolerance on our bearings confirms to ISI, ISO, DIN and ABEC –I
standards.
At KGB it is standard routine to calibrate its all-testing
equipment’s on regular basis. We take utmost care
to keep our quality standards at its peak and maintain the
same level forever .
A detailed process drawing for each operation of manufacturing
helps us to maintain close tolerance during production.
CLEARANCE
KZ bearings are generally manufactured in normal class clearance
but upon customers specific request we supply bearings with
C2, C3, C4 or C5 clearances.
DEEP GROOVE BALL BEARINGS – SINGLE ROW, WITH SEAL
(S)
|
Bearing Designation
|
Boundary Dimensions |
Basic Load
Rating |
Limiting Speed
|
Mass |
| d |
D |
B |
Dynamic |
Static |
Oil |
Grease |
Kg
|
| mm |
mm |
mm |
C |
Co |
Lubrication |
Lubrication |
| kgf |
kgf |
RPM |
RPM |
| 607
ZZ |
7 |
19 |
6 |
505 |
205 |
28000 |
21000 |
0.008 |
| 608
ZZ |
8 |
22 |
7 |
750 |
315 |
26000 |
19000 |
0.012 |
| 609
ZZ |
9 |
24 |
7 |
900 |
355 |
25000 |
18000 |
0.014 |
| 626
ZZ |
6 |
19 |
6 |
525 |
199 |
28000 |
22000 |
0.008 |
| 627
ZZ |
7 |
22 |
7 |
750 |
315 |
26000 |
20000 |
0.013 |
| 628
ZZ |
8 |
24 |
8 |
900 |
355 |
24000 |
19000 |
0.017 |
| 629
ZZ |
9 |
26 |
8 |
1030 |
440 |
22000 |
17000 |
0.02 |
| |
6000
ZZ |
10 |
26 |
8 |
290 |
156 |
28000 |
21000 |
0.019 |
| 6001
ZZ |
12 |
28 |
8 |
315 |
176 |
26000 |
19000 |
0.022 |
| 6002
ZZ |
15 |
32 |
9 |
440 |
225 |
24000 |
18000 |
0.031 |
| 6003
ZZ |
17 |
35 |
10 |
475 |
285 |
22000 |
17000 |
0.04 |
| 6004
ZZ |
20 |
42 |
12 |
735 |
455 |
19000 |
15000 |
0.068 |
| 6005
ZZ |
25 |
47 |
12 |
880 |
570 |
17000 |
13000 |
0.078 |
| 6006
ZZ |
30 |
55 |
13 |
1040 |
695 |
14000 |
10000 |
0.11 |
| 6007
ZZ |
35 |
62 |
14 |
1250 |
865 |
12000 |
9000 |
0.16 |
| 6008
ZZ |
40 |
68 |
15 |
1320 |
950 |
11000 |
8500 |
0.19 |
| 6009
ZZ |
45 |
75 |
16 |
1660 |
1250 |
10000 |
8000 |
0.23 |
| 6010
ZZ |
50 |
80 |
16 |
1700 |
1340 |
8500 |
7000 |
0.28 |
| |
| 6200
ZZ |
10 |
30 |
9 |
400 |
228 |
26000 |
19000 |
0.032 |
| 6201
ZZ |
12 |
32 |
10 |
540 |
315 |
24000 |
18000 |
0.038 |
| 6202
ZZ |
15 |
35 |
11 |
610 |
360 |
22000 |
17000 |
0.04 |
| 6203
ZZ |
17 |
40 |
12 |
750 |
455 |
20000 |
16000 |
0.06 |
| 6204
ZZ |
20 |
47 |
14 |
1000 |
630 |
18000 |
14000 |
0.1 |
| 6205
ZZ |
25 |
52 |
15 |
1100 |
710 |
16000 |
12000 |
0.12 |
| 6206
ZZ |
30 |
62 |
16 |
1530 |
1020 |
13000 |
9500 |
0.19 |
| 6207
ZZ |
35 |
72 |
17 |
2000 |
1400 |
11000 |
8500 |
0.27 |
| 6208
ZZ |
40 |
80 |
18 |
2400 |
1700 |
10000 |
8500 |
0.37 |
| 6209
ZZ |
45 |
85 |
19 |
2600 |
1900 |
9000 |
7000 |
0.42 |
| 6210
ZZ |
50 |
90 |
20 |
2750 |
2000 |
9000 |
6700 |
0.47 |
| |
| 6300
ZZ |
10 |
35 |
11 |
630 |
380 |
22000 |
18000 |
0.053 |
| 6301
ZZ |
12 |
37 |
12 |
765 |
475 |
20000 |
17000 |
0.06 |
| 6302
ZZ |
15 |
42 |
13 |
900 |
555 |
20000 |
16000 |
0.08 |
| 6303
ZZ |
17 |
47 |
14 |
1060 |
670 |
19000 |
15000 |
0.11 |
| 6304
ZZ |
20 |
52 |
15 |
1250 |
800 |
17000 |
13000 |
0.14 |
| 6305
ZZ |
25 |
62 |
17 |
1760 |
1160 |
14000 |
10000 |
0.22 |
| 6306
ZZ |
30 |
72 |
19 |
2200 |
1500 |
12000 |
9000 |
0.35 |
| 6307
ZZ |
35 |
80 |
21 |
2600 |
1830 |
10000 |
8000 |
0.42 |
| 6308
ZZ |
40 |
90 |
23 |
3200 |
2240 |
9000 |
7000 |
0.63 |
| 6309
ZZ |
45 |
100 |
25 |
4150 |
3050 |
8000 |
6300 |
0.83 |
| 6310
ZZ |
50 |
110 |
27 |
4800 |
3650 |
7500 |
6000 |
1.08 |
STANDARD BEARING TOLERANCES
TOLERANCE CLASS ABEC-I
INNER RING Tolerance in um.
|
D |
Dmp |
Vdp |
V
Dmp |
Kia |
Bs |
BS |
|
diameter series |
|
mm |
7,8,9 |
0,1
|
2,3,4 |
| over |
incl. |
high |
low |
Max. |
Max. |
Max. |
Max. |
Max. |
| 1)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 |
OUTER RING Tolerance in um.
| D |
Dmp |
V
Dp 3) |
Dmp
3) |
Kea
|
CS |
V
cs |
| Open
Bearing |
| mm |
Diameter series |
| 7,8,9 |
0,1
|
2,3,4 |
0,1,2,3,4 |
| over |
Incl. |
high |
low |
Max. |
Max. |
Max. |
high |
low |
Max. |
| 1)
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 |
8 |
15 |
------ |
| 30 |
50 |
0 |
-11 |
14 |
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 |
------ |
1) This diameter is included in the group.
2) No values have been established for diameter series 7,8,9,0
and 1.
3) Applies before mounting and after removal of internal of
external snap ring. |
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