What kind of saw do you suggest to regularly cut segments of round 100-130mm diameter POM/Acetal stock for machining?
The cut should be perfectly vertical, so when mountint the piece in the chuck of a 4th axis, it is already more or less aligned.
A good miter-saw?
With a 355mm blade I found some that do 125mm cuts. But electric miter saws of that size are ment for sanding discs in metal.
Manual miter saws and band saws have the issue of the blade wandering off to the left or right when the material gets thicker.
But if that is what people use for this job, I would have to learn to get better with these tools and get more experience.
I’d go for a miter saw (here, they’re called chopsaws) as well. Bandsaw blades do wander quite a bit, but my chopsaw gives really straight cuts if I don’t push on it much as it cuts, and it has two degrees of adjustment so I can get perpendicular cuts.
Power hacksaw, or a stock cutoff band saw. I never depend on saw cut to be vertical however. Length of the cut part determines my next step. If the end part is slightly more than the steps on a lathe chuck with jaws reversed, face it and trim the OD, then flip it over and do the same. If the overhang is too big, use a live center or a steady-rest.
If L/D is >0.5ish you can trim it square on a mill set up with vee blocks or a collet if you have one that big.
For larger volumes, there are services that specialize in machining-ready blanks.
I didn’t realize a manual miter saw had that problem. And you get that same problem with a metal band saw too? Is that the same thing as Delrin?
Delrin is the DuPont brand-name of the homopolymer of PolyOxyMethylen. Usually Acetal/POM refers to the copolymer.
Oh. I just noticed this was posted a while ago. Did you get a solution?
I’ll replace my cheap, manual miter-saw with a
Küpper “Perfekt S” manual miter saw.
I have no lathe.
There is a wall preventing me from mounting anything >500mm with a tailstock and the stock material is 1m or 2m.
What I need are parts of 100-350mm.
I was going to suggest asking the guy at NY CNC. I’m sure he would know.
That sounds like the right move.
@George_Allen He works in steel and would suggest american 110V models of tools that you can’t get over here because the CE+GS certified 230V versions have different names and specs.
Where are you?
EU?
Germany (That I have an “ü” on my keyboard may have given that away already.)
And yes, that sounds right.
Any idea abot 355mm blades for plastic or soft wood?
Not really. I wouldn’t offer a suggestion because I’m not real knowledgeable in that area. Many people tell me that the plastic will melt. It usually takes a pretty high temperature (at least in my experience) before Delrin melts. I just don’t know if it requires a special blade or not.