Needle Roller Bearing Bearing Industry Number 12 Bearing Design MR Bore Diameter 1/2 in Cage Material Steel Closure Double Sealed Compatible Ring Manufacturer Part Number MI8 Full Complement No Lubricant Material Grease Oil Maximum Speed 16 000 RPM Grease 25 000 RPM Oil Maximum Temperature 250 Degrees F Minimum Temperature -5 Degrees F Needle Bearing Type Machined Needle Roller Bearing Number of Rows One Outside Diameter 3/4 in Overall Width 1 in Ring Material Alloy Steel