help! I hardened my o1 blade by drilling to fast.

[joe9knives]

Any suggestions on what to do now. I need to finish a 1/4 inch hole and only got half way.

 

[mete]

Dremel tool with small grinding point.

 

[GibsonFan]

Anneal it and finish whatever you gotta do to it?

 

[SR_matt]

did you basicaly get half way through and then the bit wouldnt go farther?. that happened to me some how even though i was drenching it with oil to keep it cool. i was most of the way through to i took a nail and taped through the other side and then drilled from that side and it worked fine.

-matt

 

[Stacy E. Apelt - Bladesmith]

Either use a carbide tipped masonry bit,or an abrasive bit like mete suggested. Use lots of lubricant,slow speed, and let the bit do the work.
Stacy

 

[Matt Shade]

O1 is tough to anneal without a heat treat oven, as it air hardens surprisingly well.
Mete's suggesting should work, but will be time consuming. You might also try a masonry bit, as they're carbide tipped. You might have to choose a size smaller than the hole you have started to keep it from binding and breaking the tip. The you could use the dremel to ream it out the rest of the way.

I would probably just move the hole and try again if you can. It shouldn't have work hardended over a very big area.

 

[joe9knives]

I forgot to mention it is a locking liner blade. If I can't get this figured out I guess I'll start over.

 

[Danbo]

Carbide bit.

 

[joe9knives]

I will try the carbide bit and then the dremel if that doesn't work. If that still doesn't work I will moan and groan for a day or to, tell my wife I will quit making knives, then go to my shop and start all over again like nothing happened. Thanks for the info guys.

 

[Barkes Knife Shop]

I will try the carbide bit and then the dremel if that doesn't work. If that still doesn't work I will moan and groan for a day or to, tell my wife I will quit making knives, then go to my shop and start all over again like nothing happened. Thanks for the info guys.

Put a new bit on and start drilling, Go slow and use cooling solution and do not push on the bit that will cause heat that will make it harder. Do this and you will be ok. May sure to use a good quality bit. God bless and I hope this was of help to you. Please note: Do not get nervous it will only add to the problem.

Barkes :thumbup:
http://my.hsonline.net/wizard/knifeshop.htm
1.812.526.6390

 

[Pinoy Knife]

I second the Solid Carbide bit statement !!
if your building a folder you want a good hole and a reamed finish inside the hole when your done .. you might want to look at a high rock drill by M.A Ford tool's their around $10 or so dollars a fellow "Maker" showed me one of these a while back and they "Rock " specially on hardened steel . don't forget to ream the hole to correct size after drilling .

 

[joe9knives]

where do I find a good reamer. I don't se them at the local hardware stores?

 

[Rob!]

Interesting - I just had the same thing happen in a 15N20 blade. The blade Rockwells in the low 40s but half way through, it went form nice clean little curlss of steel to no cutting at all. Fresh bit (cobalt) at slowest speed - same thing. Guess I'll have to buy some 3/16 carbide bits. This steel is only .085 thick!

Rob!

 

[Stacy E. Apelt - Bladesmith]

You won't find reamers or solid carbide bits in the hardware store. You will have to get them from tool suppliers like McMaster Carr,MSC,knife suppliers, etc.
Stacy