Aurora Bearing Company
Aurora Bearing Company
901 Aucutt Rd.
Montgomery, IL 60538
Phone: 630.859.2030 • Fax: 630.859.0971
Email: customersupport@aurorabearing.com • Website: www.aurorabearing.com
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  • Body - Low carbon steel, protective coated for corrosion resistance.
  • Ball - Alloy steel, heat treated, hard chrome plated.
  • Grease Fitting available for sizes -6 and up. Units are supplied without grease fittings. When a grease fitting is required, specify by adding suffix "Z" or "F". Ex.: CM-6Z = Zerk Type Fitting CM-6F = Flush Type Fitting
  • Load ratings apply only to rod ends without grease fittings. For load ratings with fittings, please consult our engineering department.
  • Studded configuration available upon request. Specify by adding suffix "S". Ex.: CM-8S.
CM & CB Image
CM & CB Dimensional Drawing
Unit of Measure
1 2 

Item #

Thread Type

B - Ball Bore

W - Ball Width

H - Head Width

A - Base to Center

D - Head Diameter

C - Thread Length

Thread Size

Ultimate Radial Static Load Capacity

CM-3 N/A Right Hand N/A .1900 in N/A .312 in N/A .234 in N/A 1.250 in N/A .625 in N/A .750 in N/A 10-32 N/A 1,204 lbs
CB-3 N/A Left Hand N/A .1900 in N/A .312 in N/A .234 in N/A 1.250 in N/A .625 in N/A .750 in N/A 10-32 N/A 1,204 lbs
CM-4 N/A Right Hand N/A .2500 in N/A .375 in N/A .250 in N/A 1.562 in N/A .750 in N/A 1.000 in N/A 1/4-28 N/A 2,212 lbs
CB-4 N/A Left Hand N/A .2500 in N/A .375 in N/A .250 in N/A 1.562 in N/A .750 in N/A 1.000 in N/A 1/4-28 N/A 2,212 lbs
CM-5 N/A Right Hand N/A .3125 in N/A .437 in N/A .312 in N/A 1.875 in N/A .875 in N/A 1.250 in N/A 5/16-24 N/A 3,577 lbs
CB-5 N/A Left Hand N/A .3125 in N/A .437 in N/A .312 in N/A 1.875 in N/A .875 in N/A 1.250 in N/A 5/16-24 N/A 3,577 lbs
CM-6 N/A Right Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A 5,068 lbs
CB-6 N/A Left Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A 5,068 lbs
CM-6Z N/A Right Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A Consult Engineering Department
CB-6Z N/A Left Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A Consult Engineering Department
CM-6F N/A Right Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A Consult Engineering Department
CB-6F N/A Left Hand N/A .3750 in N/A .500 in N/A .359 in N/A 1.938 in N/A 1.000 in N/A 1.250 in N/A 3/8-24 N/A Consult Engineering Department
CM-7 N/A Right Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A 6,345 lbs
CB-7 N/A Left Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A 6,345 lbs
CM-7Z N/A Right Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A Consult Engineering Department
CB-7Z N/A Left Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A Consult Engineering Department
CM-7F N/A Right Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A Consult Engineering Department
CB-7F N/A Left Hand N/A .4375 in N/A .562 in N/A .406 in N/A 2.125 in N/A 1.125 in N/A 1.375 in N/A 7/16-20 N/A Consult Engineering Department
CM-8 N/A Right Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A 8,338 lbs
CB-8 N/A Left Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A 8,338 lbs
CM-8Z N/A Right Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A Consult Engineering Department
CB-8Z N/A Left Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A Consult Engineering Department
CM-8F N/A Right Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A Consult Engineering Department
CB-8F N/A Left Hand N/A .5000 in N/A .625 in N/A .453 in N/A 2.438 in N/A 1.312 in N/A 1.500 in N/A 1/2-20 N/A Consult Engineering Department
CM-10 N/A Right Hand N/A .6250 in N/A .750 in N/A .484 in N/A 2.625 in N/A 1.500 in N/A 1.625 in N/A 5/8-18 N/A 9,713 lbs
Unit of Measure
1 2