3651 forum posts
Did you try slowing the spindle speed way down? And drilling a small pilot hole first?
If so, you may need to anneal the bronze before trying to cut or machine it.
Edited By Hopper on 17/12/2018 03:03:50
|martin perman||17/12/2018 08:21:52|
1591 forum posts
I'm doing this as a favour for a friend and its costing me money, three worn out and broken bandsaw blades, and time trying to machine, for me, the impossible. I dont have or use HSS tooling.
I've now asked my friend to source some different material.
|Brian H||17/12/2018 08:33:11|
1134 forum posts
Another way to identify it is to try and silver solder it. If it's ali-bronze, it won't.
Don't ask me how I know!
|Nicholas Farr||17/12/2018 09:23:27|
1881 forum posts
Hi Brian, I don't quite agree with you, below is a photo of a Ali-Bronze block Silver soldered to a Brass plate, that I did about 30 years ago. I don't know the grade of the Ali-Bronze, but I do know it is Ali-Bronze, it was hacksawed, filed and drilled from a worn out Ali-Bronze nut.
Edited By Nicholas Farr on 17/12/2018 09:26:53
|John Reese||18/12/2018 02:52:02|
|746 forum posts|
Thanks for suggesting an off center point on the drill. It solves the problem of the hole tending to close around the bit.
|mark costello 1||18/12/2018 20:54:05|
514 forum posts
Could be Beryllium Copper.
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.