KOBELCO 70SR ACERA TIER 4 COMPACT EXCAVATOR SERVICE SHOP MANUAL
Manufacturers of 250x140x42 all KOBELCO are represented in our partial list 250 Bore Diameter (mm) of clients. Contact Gary for a complete KOBELCO 70SR ACERA TIER 4 COMPACT EXCAVATOR SERVICE SHOP MANUAL list Pioneer Machinery Source of clients and projects.
| Bearing number: |
7228 CD/HCP4A |
| Size (mm): |
250x140x42 |
| Bore Diameter (mm): |
250 |
| Outer Diameter (mm): |
140 |
| Width (mm): |
42 |
| d: |
140 mm |
| D: |
250 mm |
| B: |
42 mm |
Product Details
| Bearing number |
7228 CD/HCP4A |
| Size (mm) |
250x140x42 |
| Bore Diameter (mm) |
250 |
| Outer Diameter (mm) |
140 |
| Width (mm) |
42 |
| d |
140 mm |
| D |
250 mm |
| B |
42 mm |
| d1 |
176.8 mm |
| d2 |
176.8 mm |
| D1 |
213.2 mm |
| r1,2 - min. |
3 mm |
| r3,4 - min. |
1.5 mm |
| a |
47.3 mm |
| da - min. |
154 mm |
| db - min. |
154 mm |
| Da - max. |
236 mm |
| Db - max. |
241 mm |
| ra - max. |
2.5 mm |
| rb - max. |
1.5 mm |
| dn |
184.8 mm |
| Basic dynamic load rating - C |
221 kN |
| Basic static load rating - C0 |
240 kN |
| Fatigue load limit - Pu |
7.4 kN |
| Limiting speed for grease lubrication |
7000 r/min |
| Limiting speed for oil lubrication |
10000 mm/min |
| Ball - Dw |
30.162 mm |
| Ball - z |
18 |
| Gref |
83.931 cm3 |
| Calculation factor - f0 |
15.2 |
| Preload class A - GA |
850 N |
| Preload class B - GB |
1700 N |
| Preload class C - GC |
3400 N |
| Preload class D - GD |
6800 N |
| Calculation factor - f |
1 |
| Calculation factor - f2A |
1 |
| Calculation factor - f2B |
1.01 |
| Calculation factor - f2C |
1.03 |
| Calculation factor - f2D |
1.06 |
| Calculation factor - fHC |
1.01 |
| Preload class A |
181 N/micron |
| Preload class B |
245 N/micron |
| Preload class C |
339 N/micron |
| Preload class D |
485 N/micron |
| r1,2 min. |
3 mm |
| r3,4 min. |
1.5 mm |
| da min. |
154 mm |
| db min. |
154 mm |
| Da max. |
236 mm |
| Db max. |
241 mm |
| ra max. |
2.5 mm |
| rb max. |
1.5 mm |
| Basic dynamic load rating C |
221 kN |
| Basic static load rating C0 |
240 kN |
| Fatigue load limit Pu |
7.35 kN |
| Attainable speed for grease lubrication |
7000 r/min |
| Attainable speed for oil-air lubrication |
10000 r/min |
| Ball diameter Dw |
30.162 mm |
| Number of balls z |
18 |
| Reference grease quantity Gref |
83.931 cm³ |
| Preload class A GA |
850 N |
| Static axial stiffness, preload class A |
181 N/µm |
| Preload class B GB |
1700 N |
| Static axial stiffness, preload class B |
245 N/µm |
| Preload class C GC |
3400 N |
| Static axial stiffness, preload class C |
339 N/µm |
| Preload class D GD |
6800 N |
| Static axial stiffness, preload class D |
485 N/µm |
| Calculation factor f |
1.09 |
| Calculation factor f1 |
1 |
| Calculation factor f2A |
1 |
| Calculation factor f2B |
1.01 |
| Calculation factor f2C |
1.03 |
| Calculation factor f2D |
1.06 |
| Calculation factor fHC |
1.01 |
| Calculation factor f0 |
15.2 |
| Mass bearing |
6.92 kg |
Company Profile
| Worktime |
7:00AM - 6:00PM |
| Phone |
0065 82577418 |
| Fax |
0065 82577552 |