Tricky. Are bi-metal holesaws liable to shatter?
Tricky. Are bi-metal holesaws liable to shatter?
@ Jim....Nope .... Hard teeth on a spring steel type body.
So Johan your going to grab your opponent?
A possible solution might be a masonary drill it has a brazed carbide tip on the end ...I know that the carbide can shatter ....but its only going to be small particles.
http://www.tlc-direct.co.uk/Products/FX20400.htmlhttp://www.tlc-direct.co.uk/Products/FX20400.html
We whant to have the capacity to drill through almost all steel alloys :-).
Dont we all :-) The problem with Silver steel is that the colouration, showing the level of carbide content, which you use as an indicator as to when you quench in water, occurs somewhere like 300 degrees. When drilling hard materials, it is easy for the drill and workpiece to reach this temperature. If the silver steel piece reaches this temperature, it will soften, which obviosuly isnt much use. This is why High Speed Steel was invented- to stay hard and keep its edge at high tempertures. Unfortunatelly, as previosuly mentioned, HSS steels are more brittle. I reckon the way to go would be TiN- titanium nitride coated- its both g=hard and tough, and should cope with most steel alloys.
Getting something made in a machine is cheap and easy. Explain what you want and they go do it. Probably get it done for about £30 if that. Likewise the hardening bit done through a company that specialises in, and the phone books are full of them, is also easy and probably about £20. The one I used can harden front back and sides to different tempers and even apply spot tempers to corners and edges where required. A black art to be sure.
Drilling as a weapon tho, maybe on feathers but on anything larger you probably want to increase that drill bit size to about 300mm. Now that would be fun.
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