Also known as chrome-moly steel, this versatile 4140 alloy steel is used for a wide range of parts, such as axles, shafts, collets, and die holders. It resists fracturing from repeated stress.

With a minimum of 10% chromium content, stainless steel is known for corrosion resistance. It's typically not as strong as steel and can be more difficult to machine.

A combination of low friction and high wear resistance makes these alloys the best choice for use as bearings. Bearing bronze includes alloys 544, 840, 841, 863, 932, 936, 954, and AMPCO 18.

Delrin® acetal resin, also known as acetal homopolymer, is stronger and stiffer than acetal copolymer.

In addition to a low-friction surface that prevents sticking and binding, this tough material is impact and wear resistant to handle the scuffs, scrapes, and strikes that other plastics can’t.

Garolite, also called phenolic, provides a good balance of strength and heat resistance.