Needle Roller Bearing Bearing Industry Number 16121 Bearing Design M-1 Bore Diameter 1 in Cage Material Not Applicable Closure Open Compatible Ring Grainger Part Number 779KE6 Compatible Ring Manufacturer Part Number IR-1212 Full Complement Yes Lubricant Material Grease Oil Maximum Speed 4 300 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 1/4 in