EDM fixture

[absolute_mo]

Need to make a custom edm fixture - looking for suggested material to use. Ideally I'd like to use 416 SS, but I can only find it in round bar - would like to use flat bar. Not very fond of 300 series SS, since I'm going to be doing a lot of deep tapping.

 

Any reccomendations?

[Fig sign]

Bronze

[dourk]

420 comes in plenty of sizes, and is fairly easy to machine.

[absolute_mo]

The 400 series of SS would be great, but the only problem I have is that I need it as soon as possible and it only comes in round bar. The 420 is available in plate - it'll take two weeks before I get the material.

 

Bronze - never thought of that.

 

Iskander, what type of Bronze would you reccomend? Tin, Silicon, maganese.

[mold100]

I am with the 420 group, I have made quite a bit of fixturing I also have used RAMAX (prehard)I think its kinda the same thing.

[Lars Christensen]

How big a plate do you need since it will take 2 weeks?

 

400 series because it is magnetic, but 300 series seems to last longer.

How is the prizes on bronze??

 

Lars

[Bunny McRabbit]

This is erowa holders ,my holders are more enchanced and universal .

As you see ,masters (setting tools) and gripping devices from steel ,holders from bronze .

I think it is tin bronze .

My universal holder (custom design) :

I can grip any round or square part without premilling up to 25 mm ,or any part with 10*10square bar profile length 50 mm min in the bottom or any plate style electrode up to 150*150 .]

I made holders for bigger electrodes too

I made custom holders (kneeLtype ) ,center-finders,angle splitters and so on all from bronze and alluminium .

The bronze milling and drilling /threading is supereasy and fast ,uncompareble to any steel !

I run set-up for 50-100 electrodes from time to time ,milled electrode has no need for set-up in edm ,we keep them gripped in holder till there is no need for changes or repair and use them next time .

Bronze have no chance to get corrozion on edm or wireedm ,strong enough for heavy milling of electrodes on mill cnc ,easy and fast in milling ,

and not so pricey as it looks

[absolute_mo]

The fixture I'm looking to make is for a wire edm machine. The reason it'll take two weeks for the material to arrive is because it's coming from the US. - And I'm located in Ontario, Canada (and I'm not ordering a large quantity).

 

I have called three suppliers and to no avail. The best they can do for me is two weeks for material. If anyone knows of any other suppliers that are located in Ontario, it would be greatly appreciated.

[Fred @ Slate Industries]

Mcmaster carr

If I ordered a block of S.S. it would be

here at 10:00 tommorrow morning.

[Lucky]

Consider DME #7. The chemical composition is a near equivalent to 410SS. It is pre-hardened to about 35 Rc and machines exceptionally well. Available in standard and custom size flat ground plates. Delivery varies.