| Engineering Group | Mounted Bearing |
| Bearing Number | 22218 |
| Shaft Size | 3-1/2 in |
| Shaft Size Type | Imperial |
| Full Timken Part Number | QASN18A308SB |
| Locking Style | Single Concentric |
| Weight | 56 lb |
| Housing Style | Two-Bolt Pillow Block |
| UPC Code | 0883450355353 |
| Dimension A | 4.41 in |
| Dimension B | 8.35 in |
| Dimension C | 5.12 in |
| Dimension D Max | 12.87 in |
| Dimension D Min | 11.42 in |
| Dimension F | 14.96 in |
| Dimension G | 3.390 in |
| Dimension H | 1.54 in |
| Dimension J (Bolt Size) | 0.875 in |
| Dimension KA | 1.46 in |
| Dimension L | 4.29 in |
| Dimension M | 2.60 in |
| Dimension RA | 0.24 in |
| Dimension SA | 4.02 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 |
