This is a replacement O.S. Engines 40-240 Front Engine Bearing, and is intended for use with the O.S. 50SX-H Helicopter Engine. 
 
Dimensions:
Inner Diameter: 9.5mm (.375")
Outer Diameter: 22.2mm (.875")
Width: 7.1mm (.280")
 
  
 This Part Is Compatible With  
 
 
Dimensions:
Inner Diameter: 9.5mm (.375")
Outer Diameter: 22.2mm (.875")
Width: 7.1mm (.280")
| 40 SF | 40 SF ABC |  40 SF-S ABC  |  40 VF ABC | 
| 40 FSR | 45 FSR | 45 FSR-H | 46 SF | 
| 46 SF ABC | 46 SF ABC REV | 46 SF-P | 46 SF-P ABC | 
| 46 SF-S ABC | 46 SF-H | 46 VF ABC | 46 VF ABC-P | 
| 50 FSR | 50 FSR-H  |  61 SF | 61 SF-P | 
| 61 SF ABC | 61 SF ABC-P | 61 SFN-H ABC w/6B carb | 61 SFN-H w/6B carb | 
| 61 RF-H | 61 RF-H pump | 61 RF ABC | 61 RF ABC-P | 
| 61 RF-HS w/cone | 61 RFN | 61 RF ABC HANNO | 61 RFN-H ABC  |  
| 61 FSR | 61 VR-M ABC | 65 VR-M ABC | 65 VR-DF ABC | 
| FS-70 Surpass | 81 VR-M ABC | 91 VR-DF | 91 VR-DF small | 
| FS-91 Surpass | FT-120II Twin | FT-160 Twin | FF-240 4cyl  |  
|   |  FF-320 4 cyl | FF-240 4 cyl |   |  
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