Needle Roller Bearing Bearing Industry Number 81214 Bearing Design RCB Bore Diameter 1/2 in Cage Material Steel Closure Open Full Complement No Lubricant Material Oil Maximum Speed 17 000 RPM Oil Maximum Temperature 250 Degrees F Minimum Temperature -5 Degrees F Needle Bearing Type Drawn Cup Roller Clutch Number of Rows Three Outside Diameter 3/4 in Overall Width 0.875 in Ring Material Alloy Steel Roller Material Alloy Steel Seal Type Not Applicable System of Measurement Inch