Less tooling cost and more parts.
Lathe-cut is often a good molding alternative.
A sound method for washers and sleeves seldom requiring tooling.
The most popular method for sleeves and washers
Rubber lathe-cutting is a method to produce a rubber washer or sleeve with good precision, at high speed and efficiency.
The method described
A sleeve is produced by extruding or mandrel-building, which is then cured. The cured sleeve is then optionally O.D. ground to the finished O.D. The sleeve is then transferred to a cutting mandrel which is mounted to a lathe specially designed to cut the rubber to the desired washer thickness or sleeve length.
One cost-reducing options include elimination of the grinding step when an extruded sleeve is used and when extrusion tolerances are sufficient.
A second cost-cutting option allows for inline cutting of the sleeve,
eliminating the separate lathe-cuting step.
Both options may be combined for maimum cost savings; however, utilization of normal methods yield a part of excellent precision at very economical cost and with minimal part-to-part variation.
Most compounds can be lathe-cut; however, there are limitations on the use of very soft and very hard rubber compounds and some compounds do not lend themselves to grinding, including natural rubber and urethane.
Uses include seals, gaskets, spacers, shims, belts (unsupported), vibration dampeners, and air and liquid filter gaskets. Lathe-cut sleeves make excellent roll and roller coverings.