Cutting brass disks from sheet

Gallery, Projects and General > How do I??

<< < (5/6) > >>

DMIOM:

--- Quote from: awemawson on January 08, 2013, 06:05:35 AM ---Here you go Chris:

http://www.ebay.co.uk/itm/SAHINLER-IDK-1-CIRCULAR-CUTTING-MACHINE-/271134709288?pt=LH_DefaultDomain_3&hash=item3f20e35628

Regards,

Andrew

--- End quote ---

and if you want more info on these Chris, Ralph had one - although those look possibly bigger than you might want in your basement clock works!

..... maybe there's scope for one of our casting crew to make a tiddly version suitable for clock wheels? :proj:

Dave

Meldonmech:
Chris
As Andy pointed out the grinding geometry should be similar to a parting tool, ground initially to to the same diameters as each side of the slot you are cutting, then given side clearances to prevent binding. The aim is to produce a disc with a square edge to avoid any further machining, so instead of having a perfectly square end on the tool, grind a small amount off the left hand side to produce an angle. This will ensure you will break through on the outer circumference of the disc, leaving any burrs on the scrap side. The tool must have zero top rake to ensure the tool is not grabbed by the brass. I would advise a little practice on scrap before moving onto an important clock part.
Good Luck David

sparky961:
I'm not 100% sure it would work to cut brass since I've never tried yet, but can you not find a shop that does laser cutting in your area and see if they would do it?

Maybe this is easier said than done for most people, but we have a few of them where I work. :)

-Sparky

raynerd:
Hi sparky, not willing to pay for laser cutting as they aren't critical in size and different sizes, so wasted money.

Just to let you guys know since this is still attracting comments and I just wanted to say I am trying your ideas.

I've fitted a circular saw to my pillar drill and sure enough it'll cut with no centre drill if I take it slow at the start. I appreciate in my original email I ask about a disk with no centre hole but I've modded the centre drill to make a much smaller drill and actually it is quicker still to simply use my bosh drill to cut the disks using the circular disk cutter with a moded tiny centre drill.

The idea of trepanning is still most definitely something I want to try soon.

Thanks for all the interesting ideas and replies.

Chris

raynerd:
Rather than start a new thread, I just wanted to ask a similar question:

We have a big 6 foot standing bandsaw here at work and just to test it, it took the corner of a 3mm plate cz120 leaded brass sheet without any issue...in fact, cut through it like cheese. Would a cheapo bench top bandsaw do the same? I certainly know a friend on here uses a bandsaw to cut through brass but I expect his is a bigger machine than the cheap bench top ones I`m looking at. Any thoughts?

Phil - what bandsaw do you use?

Navigation

 Message Index

Go to full version