| Gallery, Projects and General > How do I?? |
| Need Help Buiding Bead Roller Dies |
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| snub:
I built myself a tubing bead roller as I have some aluminum supercharger tubing that needs a bead rolled on each end so the hose clamp doesn't blow off when high boost is encountered. The female die was easy, but the male was a super pain in the rear. I got it done but it took forever and it's less than perfect. Here is a picture of the rollers. The male doesn't actually look that bad in the photo. ( Trick Photography ). So I see these " roundover end mills" on the Interweb and I'm wondering if these might be the answer to some easy die building. KMS Tools has a set like this on sale for $100.00 CDN which won't empty my bank account but thought I better ask first in case they aren't suitable for the job. And since my math is bad I thought I would ask this question. The set comes with 8 pieces with a radius of 1/8th inch to 3/8". I'm thinking that radius is half the diameter, so if I wanted the "lip" of the male die to be 1/4" wide I would use a bit with a 1/4" radius, do one side, then turn it around and do the other side. I'm only guessing as I've not used these before. |
| dawesy:
I've seen milling cutters mounted in a lathe tool post for this kind of thing so I can't see why it wouldn't work. Have you thought about making a HSS form tool? |
| lordedmond:
Snub For the male roller just make up a form tool . Get some 8 mm thick gauge plate ( it is like silver steel and can be hardened the same way) Set it up in the mill at a slight angle drill and ream for the width OD the form you want, then mill off to less than half the hole at the same setting, touch up the sharp corner , harden fully and then let it down a touch ,hone the top surface , use at slow revs and plenty of lube . They work fine I have a box full and much cheaper than the em you have shown Stuart |
| vtsteam:
And the form tool need only be the half or full size of the bead, not the full width of the roller, to reduce chatter and tool pressure. On this side of the Pond "gauge plate" is called flat ground tool steel. You'd want the type that can be oil or water hardened and tempered, if you were going to do that. It should come fully annealed, or you will have to anneal it first. I've used automotive spring stock, too, annealed and hardened and tempered. |
| lordedmond:
Thanks for the update on the terms for the same stuff the joys of the English language We all do it use the terms we know , sometimes it can cause a red face the USA know then as an eraser we in the UK say rubber 😳 Stuart |
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