Video Freehand Grinding your Tools and Cutters


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    Default Freehand Grinding your Tools and Cutters

    Hi Folks

    If I get time I hope to eventually video a series on freehand grinding tools and cutters.

    I know many of you are experienced in this - but there are probably some out there who would benefit from a few tips.

    Here is the introduction: Part 1



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    Quote Originally Posted by keen View Post
    Hi Folks

    If I get time I hope to eventually video a series on freehand grinding tools and cutters.

    I know many of you are experienced in this - but there are probably some out there who would benefit from a few tips.

    Here is the introduction: Part 1

    Nice video very well done, thank you



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    Default Re: Freehand Grinding your Tools and Cutters

    Good info and video Keen!

    I learned to hand grind drills just out of high school, I have hand sharpened taps as well in a pinch.
    It saved lots of time and money when I did stainless work.

    Keep up the good work.......

    mike sr


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    Default Re: Freehand Grinding your Tools and Cutters

    Thanks for the feedback guys - it really helps to hear when you are heading in the right direction!

    Cheers Keen



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    Default Re: Freehand Grinding your Tools and Cutters

    I made a special 3/8" spotting drill, with an oddball angle, needed one in a hurry to make a special chamfer on a part, took maybe 20 min to cut off a 3/8" drill, thin the web, get the angle and relief right, no cost other than a bit of time and the satisfaction of being able to do it myself............

    The guys in the shop would get a new drill rather than resharpen the old one, when the box got full of used ones they would throw them in the trash on cleanup day, I had probably 20 pounds of used drills that I am still using out of today 25 years later.......

    lots of holes in 304 stainless will give you lots practice sharpening drills.........

    mike sr


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    Default Re: Freehand Grinding your Tools and Cutters

    Nice one. Next video: split points



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    Default Re: Freehand Grinding your Tools and Cutters

    The tricky bit is making sure the edges are DEAD symmetrical. If they are not the bit will drill over-size and on one edge only. I have some Chinese drill bits like that.

    Cheers
    Roger



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    Default Re: Freehand Grinding your Tools and Cutters

    It depends on how critical the hole is, and how much time you can wait on a factory sharpened drill or reamer if it isnt in stock.

    An old mentor showed me how to drill a tight hole or even a bit undersize, he would just touch the corners of the drill on the grinder very slightly, this will tend to push the drill lips to the center of the hole. It takes a bit of experimentation but it does work in a pinch.

    Just an old "git-ur-dun" trick where time is of the essence.

    mike sr


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    Default Re: Freehand Grinding your Tools and Cutters

    I bought a Darex Drill Grinder about 15 tears ago and it was one of the best tools I ever bought. I paid about $1500.00 for it and it makes perfect drill points.

    You can buy GOOD PARTS or you can buy CHEAP PARTS, but you can't buy GOOD CHEAP PARTS.


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    Default Re: Freehand Grinding your Tools and Cutters

    Quote Originally Posted by Steve Seebold View Post
    I bought a Darex Drill Grinder about 15 tears ago and it was one of the best tools I ever bought. I paid about $1500.00 for it and it makes perfect drill points.
    Steve,
    I bought the end mill grinder about 1997, it will grind the ends and the flutes, gave about 1600 for it and it wont sharpen drills?? It does have an air spindle on it. It saved me many dollars when I was doing stainless work.

    mike sr


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    Default Re: Freehand Grinding your Tools and Cutters

    Quote Originally Posted by popspipes View Post
    Steve,
    I bought the end mill grinder about 1997, it will grind the ends and the flutes, gave about 1600 for it and it wont sharpen drills?? It does have an air spindle on it. It saved me many dollars when I was doing stainless work.
    Mike,

    What do you have for an EM grinder. I have been wanted to buy a simple bench top grinder.

    gary



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    Default Re: Freehand Grinding your Tools and Cutters

    Quote Originally Posted by nitewatchman View Post
    Mike,

    What do you have for an EM grinder. I have been wanted to buy a simple bench top grinder.

    gary
    Gary,

    It is a Darex, it only sharpens the flutes and ends, they did sell a ball end attachment but I think its discontinued now.

    Keen has one that I would consider now, cheaper and does more, cant recall the name of it just now??

    edit: Darex E 90

    mike sr


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