Drilled and Modified
Precision Balls

Hartford customers often ask us to modify precision balls to suit a
particular application. Precision balls from Hartford can be manufactured
with a partial, or drilled-through hole. Balls can be modified to have one
or two flats. Often, a customer requests a drilled ball with a threaded hole.

Hartford drilled and modified precision balls have many, diverse
applications. Automotive drive trains are a primary user, also ball seat
valves, and seat slides.  Drilled balls are used in jewelry, in pump check
valves, and in physics balls sets used in education.  They are widely used
in scientific instruments for volume/density, collision, impact, and other
experiments.   Probe tips and pendulum bobs are additional applications
for Hartford drilled balls within the laboratory environment.

Hartford has a substantial capacity for drilled and modified precision balls,
thanks to a unique two-continent manufacturing system. This is particularly
advantageous for customers who have high quality requirements,
multiple delivery sites and tight lead times.  

Hartford drilled balls are manufactured in several grades of stainless steel,
carbon steel, brass, aluminum, glass and several plastics. Sizes range from
3/64" to 2 1/2", with ID tolerances typically .0008 either drilled-through,
or depth-controlled.  

Drilled balls can be customized with a broad range of surface finishes,
coatings, platings, and heat treating processes to optimize performance
and service life.   ID tolerances are typically .0008 drilled entirely through,
or depth-controlled.