Description
FAG 7321-B-MP Angular contact ball bearing single row Opendrawing and technical datas: |
 |
| Designation | X-life | Mass | Dimensions | |||||||
| m | d | D | B | r | r1 | D1 | d1 | a | ||
| ≈kg | mm | mm | mm | min | min | ≈ | ≈ | ≈ | ||
| 7321-B-MP | XL | 9 | 9 | 225 | 225 | 3 | 1.1 | 179.6 | 153.5 | 94 |
 7321-B-MP Angular contact ball bearing mounting dimensions/caption] |
 7321-B-MP Paired Angular contact ball bearing mounting dimensions/caption] |
| Mounting dimensions | Basic loading ratings | Fatigue limit load | Limiting speed | Reference speed | |||||
| da | Da | Db | ra | ra1 | dyn. Cr | stat. C0r | Cur | nG | nB |
| min | max | max | max | max | N | N | M | min–1 | min–1 |
| 119 | 211 | 218 | 2.5 | 1 | 209 000 | 214 000 | 11 200 | 5 300 | 3 500 |
Features
Single row angular contact ball bearings are self-retaining units with solid inner and outer rings and ball and cage assemblies with polyamide, sheet metal or brass cages. The raceways of the inner and outer rings are offset from each other along the bearing axis. The bearings are available in open and sealed designs. Their angular adjustment facility is very limited.
X-life
Many sizes of angular contact ball bearings are classified as X-life products. These bearings are indicated in the dimension tables. Bearings of X-life quality have an improved raceway geometry and ptimised surfaces. This gives a significant increase in the fatigue limit load of the bearings. When calculating the expanded adjusted rating life, values up to 50% higher can thus be achieved. In certain applications, this means that a smaller bearing arrangement can be designed.
Radial and axial load capacity
Single row angular contact ball bearings can support axial forces in one direction and high radial forces. They must be axially adjusted against a second bearing fitted in a mirror image arrangement. The axial load carrying capacity is dependent on the contact angle; i.e. the larger the angle, the higher the load to which the bearing can be subjected. Due to the contact angle of 40°, these bearings can support high axial loads.
Operating temperature
Open angular contact ball bearings can be used at operating temperatures from –30 °C to +150 °C. Bearings with a diameter D > 240 mm are dimensionally stable up to +200 °C.
Caution!
Angular contact ball bearings with cages made from glass fibre reinforced polyamide are suitable for operating temperatures up to +120 °C, restricted by the cage material. Sealed bearings are suitable for operating temperatures from –30 °C to +110 °C, restricted by the lubricant and the seal material.
