| Engineering Group | Mounted Bearing |
| Bearing Number | 22218 |
| Shaft Size | 3-1/2 in |
| Shaft Size Type | Imperial |
| Full Timken Part Number | QAAF18A308SB |
| Locking Style | Double Concentric |
| Weight | 35 lb |
| Housing Style | Four-Bolt Square Flange |
| UPC Code | 0883450019705 |
| Dimension BC | 9.91 in |
| Dimension C | 5.13 in |
| Dimension D | 7.630 in |
| Dimension E | 7.000 in |
| Dimension F | 8.63 in |
| Dimension H | 1.31 in |
| Dimension J (Bolt Size) | 0.75 in |
| Dimension L Exp | 4.3 in |
| Dimension L Fix | 4.22 in |
| Dimension M | 2.59 in |
| Dimension N | 3.310 in |
| Dimension RAA | 0.96 in |
| Dimension SAA | 5.18 in |
| C0 - Static Load | 87200 lb |
| C - Dynamic Load (Basic) | 79700 lb |
| e - Geometry Factor | 0.23 |
| Y1 - Geometry Factor | 2.90 |
| Y2 - Geometry Factor | 4.31 |
| Oil Lubrication - M/N Seal | 1400 rpm |
| Oil Lubrication - T Seal | 2400 rpm |
| Oil Lubrication - B/C/O Seal | 1000 rpm |
| Grease Lubrication - M/N Seal | 1400 rpm |
| Grease Lubrication - T Seal | 2000 rpm |
| Grease Lubrication - B/C/O Seal | 1000 rpm |
| Float | 0.083 in |
| Shaft Tolerance | 0.0030 in |
| Eng Internal Radial Clearance - Min | 0.0024 |
| Eng Internal Radial Clearance - Max | 0.0039 |
| Pre Install Clearance Min | 0.0024 in |
| Pre Install Clearance Max | 0.0039 in |
