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The Offcial Machinist Thread: Revised 01/04/2014

A place to ask general spud cannon related questions.
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Unread postAuthor: Gun Freak » Wed Aug 14, 2013 5:48 pm

when I fired it, it sounded like a cheap toy, even though the external is beefed up.


The truth with all AEG's. The only airsoft guns that are worth it in my opinion are gas blowbacks. The models that use HPA are especially awesome.
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Unread postAuthor: evilvet » Wed Aug 14, 2013 11:13 pm

Hi fellow machinists.

I am adding a 4th axis to my CNC mill and need some advice on sourcing parts. I have the motor, gearbox etc, what I need is a 80-100mm self centring chuck that is mounted on a straight shatf, not MT arbour, so I can fit it to the gearbox.

I also need a tailstock to suit.

Having no luck in Oz, can my US or Euro cousins suggest a vendor ?
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Unread postAuthor: Blitz » Thu Aug 15, 2013 4:46 am

There's these fellas right down the street from me -- they claim to ship internationally.

http://www.shars.com/
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Unread postAuthor: jrrdw » Thu Aug 15, 2013 5:11 am

Shars makes a lot of different chucks. All the Youtube reviews I've seen are good. These things are pricey though.
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Unread postAuthor: Blitz » Thu Aug 15, 2013 5:23 am

Most reviews I've seen treat Shars as lower end, less expensive/mostly made in China gear. But generally it works. Not speaking from first hand experience, just YouTube and various forum reviews.
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Unread postAuthor: wyz2285 » Thu Aug 15, 2013 6:29 am

The truth with all AEG's. The only airsoft guns that are worth it in my opinion are gas blowbacks. The models that use HPA are especially awesome.

I've just trade my M4 AEG for a SCAR GBB, gonna use HPA for it and use a AEG hi-cap.
I need to cut some o-ring grooves, what type of cutter should I use? For lathe of course.
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Unread postAuthor: Labtecpower » Thu Aug 15, 2013 6:33 am

Can you make a picture of the tooling you have access to?
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Unread postAuthor: wyz2285 » Thu Aug 15, 2013 6:36 am

Can you make a picture of the tooling you have access to?

? You mean lathe cutters? I have a set of 8x8mm carbide tipped cutter and a indexable cutter
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Unread postAuthor: Labtecpower » Thu Aug 15, 2013 7:04 am

Do you have one like this?

Image

Otherwise you can carefully grind down one of these HSS blanks, making your own cutting tools.
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Unread postAuthor: wyz2285 » Thu Aug 15, 2013 7:27 am

parting blade? I do but it wasn't very handy, I was thinking maybe there are indexable cutters for outer and inner grooves
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Unread postAuthor: Labtecpower » Thu Aug 15, 2013 7:30 am

There are indexable O-ring groove cutters, but I like to use the tools I have at hand :)

All the O-ring grooves i've made are made with a parting blade.
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Unread postAuthor: wyz2285 » Thu Aug 15, 2013 7:35 am

All my parting blades are made out off HSS, I found them not hard enough for cutting stainless steel
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Unread postAuthor: Labtecpower » Thu Aug 15, 2013 7:38 am

What made you think they're not hard enough?

I've cut a lot of stainless steel with HSS tools, it may need some tinkering to get the cutting right tough.

What grade of stainless did you cut?
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Unread postAuthor: wyz2285 » Thu Aug 15, 2013 7:47 am

I can see the tip of the blade getting worn. However I have no problem drilling it with HSS drills.The blade it's HSS made in Germany so hope it's good quality.
Can't remember the grade, it was marked on the tube but i think I've already used that section.
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 15, 2013 9:35 am

Parting puts a lot of stress on the tool. Do it slowly and lubricate constantly with appropriate cutting fluid.
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