Over the next couple weeks, we’re going to go over the seven, basic machine processes that go into making our parts; Turning, Hobbing, Milling, Tapping, Boring, Parting, and Broaching.
Although there are numerous post-production steps that go into finishing a Profile Racing part, this is where it starts.
Up seventh: Broaching.
There are two main types of broaching: Linear and rotary.
Linear Broaching (Not shown here), is where the broach is either pushed or pulled through the part.
The spindle bosses on our cranks are an example; done twice, once to form the 48 splines, and twice to clean for final sizing.