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Precision ground balls from many compounds including Nitrile. High-speed grinding process assures exact tolerances.

Precision Ground Balls

Precision ground rubber balls produced by Rubbermill.RubberMill produces precision ground rubber balls to exacting tolerances and stringent rubber compound specifications.  After the balls are molded, they are finished by a high-speed, accurate grinding process.  The finishing process eliminates the mold parting line and results in a smooth and uniform surface.  Additionally, the machining process used on our precision ground balls provides the consistent, close diametrical and spherical dimensions that are required to produce an effective seal. RubberMill stocks many sizes of Nitrile Ground Balls in prepackaged quantities. Please call for a quote on custom size balls and compounds.

Sizes (Diameter) Tolerances
Inch Decimal Inch Millimeters Diametrical (In.) Spherical (In.)
3/32 .093 2.36 .003 .003
1/8 .125 3.18 .003 .003
9/64 .140 3.56 .003 .003
5/32 .156 3.96 .003 .003
3/16 .187 4.75 .003 .003
7/32 .218 5.54 .003 .003
1/4 .250 6.35 .003 .003
5/16 .312 7.94 .003 .003
3/8 .375 9.53 .003 .003
7/16 .437 11.11 .004 .005
1/2 .500 12.70 .004 .005
9/16 .562 14.79 .004 .005
Sizes (Diameter) Tolerances
Inch Decimal Inch Millimeters Diametrical (In.) Spherical (In.)
5/8 .625 15.88 .004 .005
3/4 .750 19.05 .004 .005
1 1.000 25.40 .004 .005
1 1/8 1.125 28.58 .006 .008
1 1/4 1.250 31.75 .008 .008
1 3/8 1.375 34.93 .008 .008
1 1/2 1.500 38.10 .008 .008
1 5/8 1.625 41.28 .010 .010
2 2.000 50.80 .010 .010
Visit our Design Illustration #46 Ball to specify your ball needs.
 
   
 

 

 

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