What Materials Are Shaft Collars Made From
27/10/2021 | Depcom Blog Team
Shaft collars are made of different materials to suit different applications and environments. There are two broad categories of materials used: metal and plastic.
Under metal, shaft collars are made from aluminium A2017, carbon steel S45C and stainless steel 304. While all shaft collars are strong and reliable, the reasons for choosing each material varies. We will study every material in more detail below.
Shaft collars made of aluminium grade A2017 are chosen for their weight to strength to cost ratio. Being strong and lightweight, they are used extensively in the aerospace industry.
Carbon Steel S45C
Carbon steel S45C is a Japanese grade carbon steel for machine structural use. Known also as 1045 steel, shaft collars made of S45C have medium tensile strength. Their hardness ranges from 14 to 27 HRC. Steel shaft collars are prone to corrosion. To get around this, carbon steel shaft collars are produced with various platings to suit different working environments. Besides corrosion, each type of plating adds an extra benefit to every shaft collar.
Carbon Steel S45C (Black Oxide Finish)
Black oxide finish is the most economical type of corrosion-resistant plating. It provides a non-reflective surface that allows shaft collars to be used almost anywhere.
Carbon Steel S45C (Cation Electrodeposition Coating)
Cation electrodeposition coating provides a uniform coat of paint on shaft collars that stays even after long periods of usage. The primary purpose for using shaft collars with cation electrodeposition coating is to resist corrosion in outdoor environments.
Carbon Steel S45C (Electroless Nickel Plating)
Electroless nickel plating is used to provide shaft collars with protection from wear and abrasion, while at the same time, increasing hardness.
Carbon Steel S45C (Nickel Chrome Plating)
Nickel chrome plating is used to improve wear resistance while providing a shiny and glossy appearance.
Carbon Steel S45C (Trivalent Chromate Plating)
Shaft collars with trivalent chromate plating are used to reduce friction, are more durable and reduce galling (or seizing) of parts.
Stainless Steel 304
Being inherently resistant to corrosion while offering high hardness make shaft collars made of 304 stainless steel popular for many applications. The only drawback is the cost, as shaft collars made of stainless steel tend to cost more than those made from other materials.
In environments where metal shaft collars cannot be used, plastic shaft collars provide a great alternative. Plastic shaft collars are made from polyoxymethylene, also known as POM. Polyoxymethylene is a general purpose plastic. Shaft collars made with polyoxymethylene are lightweight, non-magnetic and do not seize onto other metal parts.