Needle Roller Bearing Bearing Industry Number 12121 Bearing Design M-1 Bore Diameter 3/4 in Cage Material Not Applicable Closure Open Compatible Ring Grainger Part Number 779KF7 Compatible Ring Manufacturer Part Number IR-812 Full Complement Yes Lubricant Material Grease Oil Maximum Speed 5 600 RPM Maximum Temperature 250 Degrees F Minimum Temperature -4 Degrees F Needle Bearing Type Drawn Cup Needle Roller Bearing Number of Rows One Outside Diameter 1 in Overall Width 0.75 in