IBC
Angular Contact Ball Bearing
RFQ
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
IBC CBHM71904.E 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 | 4700 N | Basic dynamic load rating, radial |
| C0r | 1800 N | Basic static load rating, radial |
| Cu | 67 N | Fatigue limit load |
| nG | 61100 1/min | Limiting speed (grease) |
| nO | 92800 1/min | Limiting speed (oil-air) |
| ≈m | 0.035 kg | Weight |
| α | 25 ° | Contact angle |
| Symbol | Value | Description |
|---|---|---|
| d | 20 mm | Bore diameter |
| D | 37 mm | Outside diameter |
| B | 9 mm | Width |
| a | 11 mm | Effective load centre |
| d1 | 26.4 mm | Shoulder diameter, inner ring |
| D1 | 30.6 mm | Shoulder diameter, outer ring |
| r1,2 min | 0.3 mm | Minimum chamfer dimension |
| r3,4 min | 0.2 mm | Minimum chamfer dimension, side face |
| Symbol | Value | Description |
|---|---|---|
| da min | 24 mm | Min. shoulder diameter for mounting, inner ring |
| Da max | 34.5 mm | Max. shoulder diameter for mounting, housing |
| Db max | 35.7 mm | Max. shoulder diameter, sealed side |
| ra max | 0.3 mm | Max. fillet radius |
| rb max | 0.2 mm | Max. fillet radius, side face |
| Symbol | Value | Description |
|---|---|---|
| Fv L | 16 N | Preload force — class L (light) |
| Sa L | 35 N/μm | Axial stiffness — class L (light) |
| Sr L | 70 N/μm | Radial stiffness — class L (light) |
| FAK L | 45 N | Unloading force — class L (light) |
| Fv M | 45 N | Preload force — class M (medium) |
| Sa M | 50 N/μm | Axial stiffness — class M (medium) |
| Sr M | 100 N/μm | Radial stiffness — class M (medium) |
| FAK M | 130 N | Unloading force — class M (medium) |
| Fv H | 95 N | Preload force — class H (high) |
| Sa H | 65 N/μm | Axial stiffness — class H (high) |
| Sr H | 130 N/μm | Radial stiffness — class H (high) |
| FAK H | 270 N | Unloading force — class H (high) |
| Code | Description |
|---|---|
| Si3N4 ceramic (hybrid) | Rolling element material |
| 100Cr6 | Ring material |
| P4A | Tolerance class |
| MBA 20 | 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:
CBHM71904ECBHM71904 ECBHM71904IBCCBHM71904EIBC CBHM 71904 EIBCCBHM 71904 EIBCCBHM71904 EIBC CBHM71904EIBC CBHM 71904EIBCCBHM71904CBHMRFQ
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