 |
At
Hartford Technologies the manufacture of precision balls
is a combination of an exacting science, experience, and
the most modern facilities for efficient ball production.
Only the finest grades of ball wire are used, selected
and inspected to our own high standards.
|
|
Heading
First, the wire or rod, depending on the size ball
to be made, is cut into slugs and "headed",
or cold-formed, into spherical blanks on high-speed
automatic machines.
|
|
|
Flashing
The flashing operation removes the "belt"
and small protrusions from the surface by rolling
them between two hard plates under very high pressure.
This brings the balls to their "rough" size
and sphericity.
|
|
|
Heat
Treat
The balls are then heat-treated, or hardened, in a
controlled atmosphere furnace. The balls are then
inspected for
grain size and metallurgical structure.
|
|
|
Grinding
The hardened balls are then precision ground by rolling
them between a fixed iron plate and a very hard fine-grit
grinding wheel to bring them to their finished size.
|
|
|
Lapping
and Polishing
To ensure the balls meet diameter and sphericity
tolerances the balls are then rolled between two
iron plates: one of which is fixed and the other
which rotates and at a very low speed. A polishing
operation creates a high shine to the ball. |
|
