Est. 1998 — 27 years of woodworking knowledge
Question for Derek Cohen
Joe in a Cleveland suburb
>Derek.
In your answer to my DT question, you suggest making a skew chisel. How did you grind all that metal away with out over heating the chisel. Do you just grind a tiny bit then dip it in water?
I have a high speed grinder with one of those somewhat course wheels on it. It's real easy to get the metal real hot. Is that a concern?
Thanks.
Joe
P.S. I saw your jig in PopWW. Good job. I will make one of those too.
Re: Question for Derek Cohen
Derek Cohen (in Perth, Australia)
>Hi Joe
I ground the steel without burning it or altering the temper. It is a fairly straight forward job when the steel is thick - as it is further back from the blade edge (one of the reasons I avoid grinding right up to the tip on a high speed grinder).
I used a combination of a bench grinder (mainly) and a small angle grinder. Just make sure that you "tickle" the steel. Don't try and do it quickly. Quench the steel frequently in water. Use as coarse a wheel as possible.
The fishtail chisel I illustrated is a 3/8", which has proved to be a good size. A 1/2" would be just a tad too wide.
I think that this is a good project for those old, derelict chisels that lie in your drawer. Make a couple of left- and right skews as well.
Regards from Perth
Derek
Thank you.
Joe in a Cleveland suburb
not Derek but..
Jack Guzman from Maine
>When I have to grind a new shape to a chisel I mark what has to be removed then hold the chisel blade tip first at 90 deg to the stone and grind away the marked area.Then more carefully I grind the bevel til there's a little left of the flat end.I remove the rest with water stones.
You do need to cool often.However if you use a cooler stone(white or blue norton 3x)the steel doesn't heat up so often.---Jack
Ok. Thanks!
Joe in a Cleveland suburb
Re: not Derek but..
Derek Cohen (in Perth, Australia)
>Hi Jack
What you say is correct for grinding a bevel. However Joe is asking about grinding the side of the chisel and shaping it into a fishtail. Waterstones might take a mite longer than desired. :)
Regards from Perth
Derek
Re: not Derek but..
Joe in a Cleveland suburb
>I understand and appreciate both comments and/or advice.
I plan to destroy an old chisel this weekend.
Thanks!
Joe
Type of Wheel
David Charlesworth
>The softest coarsest wheel you can get, helps to keep things cool.
Wheels dressed with 'Star Wheel Dresser" cut cooler than those dressed with diamond.
But dust from such a wheel should be taken seriously, please wear a dust mask, as well as eye protection.
David Charlesworth
OK
Jack Guzman from Maine
>For some reason I had pictured skewing the existing edge but I see that he was talking about grinding recesses into the sides to get the same result Rob Cosman got for his dt chisel.I need to make one myself like that.At the present I use a narrow chisel to reach as deep as I can into the corner from different angles but it's not a perfect system---Jack