Supporting > Tooling & Machines

How to make a form tool?

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Sanjay F:
Mine is most definitley Ali, it looks like the set is still in its original packaging; unnecessarily huge box with parts sealed in the top, bottom and side.

@Jason - just checking, from the drawing, is the bead a full half round, or am I missing something?

Also:
How many degrees is a 'few' degrees for the tilt?  :)
Is the quenching in oil?

Jo:
Have a look at router bits I suspect you will be able to find the profile you need for not a lot.

Making a tool out of hardened silver steel or case hardening steel is easy enough if need be.

Jo

Jo:
Water cools quicker than oil. So I normally use oil for tempering and water for hardening.

Have you got any square HSS? And a 1/4" grinding bit? If so you can use your dremel to make a good tool that will last a life time.

Hand turning a one off small diameter is also an option  ::)

Jo

Jasonb:
See my edit. up a couple of posts

The bottom diameters are only 3/16" different so the bead is only 3/32" high I would say the top is the same.

Due to this difference you are unlikely to find a suitable router bit and much like rounding over milling cutters they tend to have a length of straight cut at the end so even less suitable.

5degrees at the most. I always Quench in water.

Also rough it out first much like you can see on those beads I'm cutting around that cylinder. So face the plain round bands ot overall diameter, reduce each side by 3/32" deep and then you can just form the curve with the form tool, run slowly to avoid chatter and lubricate with paraffin or WD40

As there are two beads to produce a form tool makes more sense once you have more than one item to form so they match unless you have a cNC lathe..

Jasonb:
I just had a look at the drawing for my Big Willy (amson) and you can see that the ctr of the bead is inset from the flat areas each side

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