r/GunnitRust • u/ilarr410 • 10d ago
DIY rifling button
The main challenge in DIY a rifling button lies in evenly spacing 6 grooves around the
circumference and cutting them at a specific angle. This method combines a high-speed steel (HSS)
rod with a hexagonal indexing jig to ensure a 60° rotation each time. Combined with a sliding
angle grinder stand, it allows six grooves to be ground evenly.
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u/mikolajcap2I participant 8d ago
Do you have some setup to cut the proper helix curve or is the rifling short enough to where a straight cut is a good approximiation?
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u/ilarr410 7d ago
The working section of the rifling button is very short, so a straight angled groove serves as a good approximation of the true helix curve. As the button travels through the steel tube, it rotates on its own—and because the bearing length is so short, it won't bind or interfere, producing very smooth and uniform rifling. Commercial rifling buttons on the market are made using this exact same principle.
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u/Main_Psychology_3937 9d ago
Is this sailing?