Ask HN: What tool set, how to make own wide bolt ring
How and by what tool set can we make our own wide bolt ring out of steel (or other metal) plate
to have ~30 mm outer diameter thickness ~1-2mm, center hole ~5-10mm ?
to have ~30 mm outer diameter thickness ~1-2mm, center hole ~5-10mm ?
Given the ratio from outer diam (30mm) to shaft (2mm) and whatever material and forces you're looking to bolt in place, you might want to consider an additional mid size washer to "pyramid" out the load from the head of the bolt to the base of the bottom washer.
If you need them in large quantities then probably stamp them out.
In small quantities, then drill the holes in a plate and then cut out with a saw. If you pivot the rough cut plate around the drilled out hole, then you could set up a jig and use a bandsaw.