IBC
Angular Contact Ball Bearing
RFQ
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
IBC CBHM71908.C Angular Contact Ball Bearing supports combined radial and one-direction axial load through a defined contact angle. It is a high-speed, high-precision choice for pumps, compressors, machine tools, and spindle-related positions where axial rigidity and rotational accuracy matter.
The inner and outer ring raceways are offset to create a contact angle. Single-row, double-row, or matched arrangements can be used to meet axial load direction, preload, and rigidity requirements.
Select by contact angle, arrangement, preload, precision class, axial load direction, and operating speed.
| Symbol | Value | Description |
|---|---|---|
| Cr | 10000 N | Basic dynamic load rating, radial |
| C0r | 5100 N | Basic static load rating, radial |
| Cu | 189 N | Fatigue limit load |
| nG | 39300 1/min | Limiting speed (grease) |
| nO | 59700 1/min | Limiting speed (oil-air) |
| ≈m | 0.11 kg | Weight |
| α | 18 ° | Contact angle |
| Symbol | Value | Description |
|---|---|---|
| d | 40 mm | Bore diameter |
| D | 62 mm | Outside diameter |
| B | 12 mm | Width |
| a | 14 mm | Effective load centre |
| d1 | 47.8 mm | Shoulder diameter, inner ring |
| D1 | 54.2 mm | Shoulder diameter, outer ring |
| r1,2 min | 0.6 mm | Minimum chamfer dimension |
| r3,4 min | 0.3 mm | Minimum chamfer dimension, side face |
| Symbol | Value | Description |
|---|---|---|
| da min | 45 mm | Min. shoulder diameter for mounting, inner ring |
| Da max | 57 mm | Max. shoulder diameter for mounting, housing |
| Db max | 59.3 mm | Max. shoulder diameter, sealed side |
| ra max | 0.6 mm | Max. fillet radius |
| rb max | 0.3 mm | Max. fillet radius, side face |
| Symbol | Value | Description |
|---|---|---|
| Fv L | 19 N | Preload force — class L (light) |
| Sa L | 23 N/μm | Axial stiffness — class L (light) |
| Sr L | 140 N/μm | Radial stiffness — class L (light) |
| FAK L | 50 N | Unloading force — class L (light) |
| Fv M | 55 N | Preload force — class M (medium) |
| Sa M | 35 N/μm | Axial stiffness — class M (medium) |
| Sr M | 170 N/μm | Radial stiffness — class M (medium) |
| FAK M | 160 N | Unloading force — class M (medium) |
| Fv H | 110 N | Preload force — class H (high) |
| Sa H | 45 N/μm | Axial stiffness — class H (high) |
| Sr H | 210 N/μm | Radial stiffness — class H (high) |
| FAK H | 320 N | Unloading force — class H (high) |
| Code | Description |
|---|---|
| Si3N4 ceramic (hybrid) | Rolling element material |
| 100Cr6 | Ring material |
| P4A | Tolerance class |
| MBA 40 | Recommended precision locknut |
| High-precision angular contact ball bearing, speed-optimized HM series, hybrid (ceramic balls) | Product type |
The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:
CBHM71908CCBHM71908 CCBHM71908IBCCBHM71908CIBC CBHM 71908 CIBCCBHM 71908 CIBCCBHM71908 CIBC CBHM71908CIBC CBHM 71908CIBCCBHM71908CBHMRFQ
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