Needle Roller Bearing, Bearing Industry Number 121610, Bearing Design RC, Bore Diameter 3/4 in, Cage Material , Closure Open, Full Complement No, Lubricant Material Grease, Oil, Maximum Speed 12,000 RPM, Maximum Temperature 200 Degrees F, Minimum Temperature -22 Degrees F, Needle Bearing Type Drawn Cup Roller Clutch, Number of Rows One, Outside Diameter 1 in, Overall Width 0.625 in, Ring Material Alloy Steel, Roller Material Alloy Steel, Seal Type Not Applicable