MS20221
Pulley, Groove, Heavy Duty, Control, Aircraft
| Part Number Non-Metallic Sheave | Part Number Metallic Sheave | Cable Size (ref) | ØA | ØB | ØC | ØD | E | Pulley Assembly Max Weight (lbs) | Bearing | Allowable Load On Pulley (lbs) | Max Limit Load on Cable independent of Wrap Angle (lbs) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outside Diameter ± 0.005 | Groove Diameter ± 0.005 | I.R. Outer Diameter (ref) | Bore Diameter (ref) | I.R. Width (ref) | MS21443 Dash No. | Bearing Part Number | 3/16" Cable | 7/32" Cable | 1/4" Cable | |||||
| MS20221A1 | 3/16" 7/32" 1/4" | 2.625 | 2.000 | 0.455 | 0.3125 | 0.625 | 0.165 | -5B | PD5K | 2,800 | 2,620 | 3,060 | 3,500 | |
| MS20221-2 | MS20221A2 | 4.125 | 3.500 | 0.768 | 0.5000 | 0.750 | 0.45 | -8 | P8 | 4,900 | ||||
| MS20221-3 | MS20221A3 | 5.625 | 5.000 | 0.68 | 7,000 | |||||||||
SUPERSEDES: AN221 > MS20221 > MIL-DTL-7034/3A
Materials
Non-metallic sheaves are machined from an engineered phenolic laminate exceeding the requirements of MIL-I-24768/16. Metallic sheaves are 2024-T351 aluminum alloy conforming to SAE AMS-QQ-A-225/6.
Finish
Aluminum sheaves are anodized according to MIL-A-8625, Type II, Class I.
Bearing
Conforming to the requirements of AS7949 and AS21443.
Lubrication
Grease conforming to MIL-PRF-81322 or MIL-PRF-23827.