FAG
Four-point contact bearing
Four-Point Contact Ball Bearing
From US$46.93
Excl. VAT| Spec | Price | Quantity |
|---|---|---|
| fag:QJ308-MPA | US$46.93 |
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
FAG QJ308-MPA Four-Point Contact Ball Bearing is a compact angular contact design that can support axial load in both directions and a portion of radial load in a single bearing. It suits gearboxes, cranes, and rotary tables where axial space saving and shaft location are required.
A split inner ring or specially shaped raceway allows the balls to contact at four points. It can replace certain paired angular contact arrangements while reducing axial width.
Confirm axial load dominance, radial load ratio, speed, internal clearance, and the companion bearing arrangement.
| Symbol | Value | Description |
|---|---|---|
| d | 40 mm | Bore diameter |
| D | 90 mm | Outside diameter |
| B | 23 mm | Width |
| Cr | 84.000 N | Basic dynamic load rating, radial |
| C0r | 62.000 N | Basic static load rating, radial |
| Cur | 4.350 N | Fatigue load limit, radial |
| nG | 15.400 1/min | Limiting speed |
| nϑr | 6.400 1/min | Reference speed |
| ≈m | 0,755 kg | Weight |
| Symbol | Value | Description |
|---|---|---|
| rmin | 1,5 mm | Minimum chamfer dimension |
| D1 | 73,35 mm | Shoulder diameter outer ring |
| d1 | 56,65 mm | Shoulder diameter inner ring |
| a | 45,5 mm | Distance between the apexes of the pressure cones |
| α | 35 ° | Contact angle |
| Item | Code | Description |
|---|---|---|
| Cage | MPA | Solid brass cage, outer ring guided |
| Tolerance class | PN | Tolerance class PN, acc. to DIN 620 |
| Dimensional / heat stabilization | S0 | Rings dimensional stabilized up to 150° |
| Axial internal clearance | CN | Group N (CN) |
| Symbol | Value | Description |
|---|---|---|
| da min | 49 mm | Minimum diameter shaft shoulder |
| Da max | 81 mm | Maximum diameter of housing shoulder |
| ra max | 1,5 mm | Maximum fillet radius |
| Symbol | Value | Description |
|---|---|---|
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 150 °C | Operating temperature max. |
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:
QJ308MPAQJ308 MPAQJ308FAGQJ308MPAFAG QJ308 MPAFAGQJ308 MPAFAG QJ308MPAFAGQJ308From US$46.93
Excl. VAT| Spec | Price | Quantity |
|---|---|---|
| fag:QJ308-MPA | US$46.93 |
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