At Rathbone Precision Metals Inc., we specialize in cold drawn gears – in particular, gear and spline, and rack and pinion cold drawing. Cold drawing involves the precision extrusion of preformed metal shapes at room temperatures through a die or a series of dies. This process allows us to produce cleanly finished products within extremely tight tolerances. Our cold drawn gears also benefit from improved dimensional consistency and straightness, as well as enhanced overall strength due to strain hardening.
What Types of Profiles for Gears Can Rathbone Precision Metals Draw?
Since 1905, Rathbone Precision Metals Inc. has built a solid reputation as a leading manufacturer of cold drawn gears and other machining components for a variety of industries. During more than 100 years of operation, we have custom drawn countless gear profiles containing unique tooth configurations for the automotive industry. Using a variety of metal alloy compositions, we can produce parts and components within tolerances up to ± 0.002 inches. Furthermore, cold drawing gives us greater control of corners, allowing for precise fillet radii to ± 0.005 inches.
We can also cold draw gears for use in heavy equipment and machinery, which often require the production of gears with asymmetrical profiles. The smooth finishes obtained by our processes eliminate the need for secondary milling process such as hobbing, resulting in cost savings that are passed on to our customers.
In addition to the cold drawing of gears, splines, and pinions, Rathbone Precision Metals Inc. also specializes in the cold rolled manufacturing of various mechanical components from a range of metals and alloys including carbon steel, stainless steel, nickel alloys, and copper alloys.
The Process of Gear and Pinion Drawing
Cold drawing is done by pulling or extruding new, hot rolled shapes through one or more precision dies. As the material passes through the die, it is compressed into the shape of the die. This forceful change of shape readjusts and strengthens the crystalline structure of the metal due to a process known as strain hardening.
Because cold drawing is done at near-room temperatures, the finished products do not undergo cooling and shrinkage processes (as in hot drawn and hot rolled methods) which tend to alter the overall final dimensions. This characteristic makes cold drawing ideal for producing components (such as gears) that require high levels of dimensional accuracy and precision with exacting tolerances. Cold drawn methods are also cost-effective for both low and high production volumes.
Rathbone Precision Metals Inc.’s cold drawn products offer numerous advantages over gears produced by other methods. If you would like to know more about our gear drawing solutions and processes, feel free to contact us or request a quote.