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The Newbies Arena Are you new to knife making? Here is all the help you will need.

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  #1  
Old 07-23-2001, 01:00 PM
dmelton
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Finished my home built 2x72 grinder


After a long session in the shop yesterday I finally finished my 2x72
grinder. I've got to say a big thanks to both Rob Frink of Beaumont metal works and Wayne Goddard,
they were both VERY helpful with advice on building this grinder and they
helped me through a couple of spots where I got "stuck" building it. Rob
did EXCELLENT work on the crowned idler wheel and the custom shaft he
turned to fit a Grizzly contact wheel. Wayne's section on home built
grinders in his "$50 Knife Shop" book is a great reference, I don't know
how many times I re-read that chapter when building this thing.

You can see somewhat detailed steps on how I built it at:
www.derekmelton.com

Here's me grinding my first piece of steel on the grinder:
www.derekmelton.com/knife...tgrind.jpg

I guess I spent about $150-200 total on this grinder. Some may say that
would be better spent on a Grizzly or a Coote but I have the satisfaction
of having made my own and it's very easy to modify now since it's all
bolted together construction.

Now, if I can just learn how to use this beast I'll be set!

Thanks,
Derek Melton


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  #2  
Old 07-23-2001, 03:06 PM
ansoknives
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nothing as good as making your own tools. Best thing is if it ever breaks down on you...you can fix it!
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  #3  
Old 07-23-2001, 08:43 PM
Mike Conner
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That is Cool Derek, I built my last one and love it. I also got some of the parts from Rob and he did a first class job.
Mike
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  #4  
Old 07-23-2001, 08:57 PM
ghostdog
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Hey Derek, right on. Your web site is getting big and is fun and informative.

ghostdog
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  #5  
Old 07-24-2001, 08:50 AM
viper5192
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Wow good looking stuff! Looks like you had fun making that baby! How's it workin' for ya??
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  #6  
Old 07-24-2001, 12:46 PM
andy gascoigne
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Great looking grinder Derek, I agree with you Waynes book has to be the best for anyone building there own grinder.
I've nearly finished mine and I to found Waynes book to be of great help.
Once you start building your own tools it's nearly as adictive as knifemaking!! ( built my own 9" disk grinder, small milling machine, belt grinder and air compressor.)

keep us informed on how you get on with you first hollow grind.

Andy..
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  #7  
Old 07-24-2001, 01:36 PM
dmelton
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Homebuilt grinder, first try


Well, I tried flat grinding out a pocket knife blade last night. I used a 36 grit to hog the metal off and profile it, this worked great. I then tried cutting in my blade bevels and it seems that after reading literally hundreds of articles and pages about how to grind I forgot all of it and nearly ruined the blade. I am going to try again using a wooden jig/pushblock to keep my grind more straight tonight. I'll post some pic's of the progress. Hey Andy, I'd be REAL interested in seeing how you built a milling machine!


Thanks for the comments!
Derek
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  #8  
Old 07-26-2001, 01:58 PM
andy gascoigne
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Re: Homebuilt grinder, first try


Hi Derek

I will try and get a few photo's together this weekend.

It's based on the style of a Taig mini mill if you know what one of those looks like.

Andy..
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  #9  
Old 07-27-2001, 02:29 PM
dmelton
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re: andy's mill


Thanks Andy I'd love to have a mini mill, and it'd be fun to try and make one.


Thanks!
Derek
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  #10  
Old 07-29-2001, 10:54 AM
andy gascoigne
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Re: re: andy's mill


Hi Derek
Here's a few photo's of my home made mini mill. It works great on most materials including Titanium. I can use end mills to about 3/8" with no chatter. The motor is a 110V dc servo motor with electronic speed control 0-2000 rpm on the motor and 3000rpm on the spindle which takes #1 morse taper tooling with a draw bar.
The Z axis slides are box construction with 1/4" gib's .
The Z axis leadscrew works on a split nut which takes out any play and locks the slide ridgid!!.





If you nead any more info please get in touch

Andy..
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  #11  
Old 07-29-2001, 11:15 AM
ansoknives
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Re: re: andy's mill


That looks real good Andy!!
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  #12  
Old 07-30-2001, 11:52 AM
dmelton
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Wow!


Wow, nice job on the mill Andy! I doubt I'm up to that kind of a challenge yet, looks like you have some machinist in you. Update on my grinder, works great but it burned up the craftsman 1/2hp motor I had on it. I was rough profiling some pocket knife blanks and the motor literally went up in smoke. I just got a 2hp motor from Harbor Frieght that should run it much better. Using the 1/2hp motor I noticed I could slow it down rather easily when putting much pressure on the belt while grinding.

Notice to all who are making their own grinder: Get at least a 1 to 1.5 hp motor for a 2x72 they will eat a small motor for lunch.

Derek
www.derekmelton.com
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  #13  
Old 07-30-2001, 12:14 PM
andy gascoigne
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Re: Wow!


Thanks Derek and Jens,

Sorry to here of your motor problems, hope my 3/4 hp on the new grinder will hold up!!!. It's a real top quality one that is totally enclosed and fan cooled.
The milling machine was only my second machine project, the first being a small air compressor made from a refrigeration pump when I was 17 (23years ago !!!).
I have no machinist training at all .My everyday work is industrial contracting working mainly with timber.
If you are interested in building workshop tools do a search on a Guy called Dave Gingery, he does a great range of "how to books" on building such tools as a home made lathe, milling machine, furnaces ,etc.

Andy..
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  #14  
Old 07-31-2001, 08:33 AM
dmelton
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Motor woes


Well, last night I finally got some time to try hooking up the new 2hp motor to the grinder. It works, but it throws the breaker on my temporary electrical connection to my shop! I have an extension cord run out there while I'm laying the conduit for the electric line and that 2hp motor doesn't like ANYTHING else to be turned on when it goes. I guess I'll have to wait until I have the 200a breaker box hooked up to actually get anything done. Hurry up and wait, it's the story of my knifemaking journey.

Derek
www.derekmelton.com
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