Broaches are used for producing keyways; cutouts with squared features on the internal section of parts. Broaches can cut square, hexagonal or custom designs. A broach has teeth that increase in size along it's shaft.
At Anoesis we use Vertical Broach machines equipped with custom broaches to quickly produce keyed cutouts through the internals of bicycle parts.
Bicycle Spider Sizes
Handheld Comparison Between Different Sized Bicycle Spiders. Before broaching on the left and after the broaching process on the right.
Vertical Broach Passing Through Bicycle Spiders
Cutting internal keyways through bicycle spiders.
Bicycle Spiders Before Broaching
Vertical Broaching Machine
Operator Cutting Internal Features Using a Vertical Broaching Machine.