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Author Topic: question for machinists  (Read 1326 times)

Offline crazypj

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Re: question for machinists
« Reply #10 on: Jan 25, 2018, 12:05:57 »
I made a tool post holder for a die grinder with a cylindrical stone to grind my chuck jaws. I angled it very slightly to cut on the leading edge and it worked perfectly.

+1
Thats the best way to do it.
 Carbide tooling would work but only if you have a big heavy machine to use it or it will bounce and flex chipping or shattering tool
You could try making a bushhing first to support boring bar and prevent it bending away cutting area
Grinding gives a better surface finish than running carbide at wrong settings though
I've also made holders to put angle grinder on tool post, real handy for 'attacking' the hardened Yamaha XS 650 flywheels or anything else you need to grind on OD
« Last Edit: Jan 25, 2018, 12:10:29 by crazypj »
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CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline c.h.stoltz.1

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Re: question for machinists
« Reply #11 on: Jan 26, 2018, 15:17:58 »
Hi guys I have a Suzuki GSX1100 RR I have redone the wiring but it looks like I missed something. I have electrical power ( constant 12v ) up to the coil packs but no spark. I have changed the cdi and everything exept the signal generator and the coil packs. Do any body know what can be the problem ?

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Offline J-Rod10

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Re: question for machinists
« Reply #12 on: Jan 26, 2018, 16:30:30 »
Hi guys I have a Suzuki GSX1100 RR I have redone the wiring but it looks like I missed something. I have electrical power ( constant 12v ) up to the coil packs but no spark. I have changed the cdi and everything exept the signal generator and the coil packs. Do any body know what can be the problem ?

Sent from my SM-G935F using Tapatalk

May want to start a thread in the electrical section.

Offline Oldmanonasuzi

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    • ffmd
Re: question for machinists
« Reply #13 on: Jan 28, 2018, 17:24:31 »
You can buy shaft material that has a nice hard outer surface but is soft enough on the inside to machine.
As an example https://www1.mcmaster.com/#1482K42
Regards,
Charlie N
66 X6
79 GS550 Raced when new, being converted into a 740 street bike.
83 GS550ES with a 1052 engine.
75 Ducati Sport, Stock and will remain so.
A few other bikes and dozens of cars too.

Offline doc_rot

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Re: question for machinists
« Reply #14 on: Jan 31, 2018, 15:01:52 »
I got it done. Rather inelegant, but it worked great. https://youtube.com/watch?v=iFUMuCnJDCU&feature=youtu.be

Offline Oldmanonasuzi

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    • ffmd
Re: question for machinists
« Reply #15 on: Jan 31, 2018, 15:33:37 »
Nice,
I have an air grinder that chucks up well in my lathe. Can't say I am happy with the surface finish but I can hit the dimensions I need as you did. It might be the Dremel you have may have better bearings than my setup as well.
Regards,
Charlie N
66 X6
79 GS550 Raced when new, being converted into a 740 street bike.
83 GS550ES with a 1052 engine.
75 Ducati Sport, Stock and will remain so.
A few other bikes and dozens of cars too.

Offline Hurco550

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Re: question for machinists
« Reply #16 on: Jan 31, 2018, 15:42:28 »
I have a dumore tool post grinder for my south bend 9, and its often so cumbersome to use that a setup like your little dremel there would be much easier to work around.
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
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1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
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Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline doc_rot

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Re: question for machinists
« Reply #17 on: Jan 31, 2018, 16:02:42 »
The problem I ran into is as the cut progresses the grinding stone wore down producing a slight taper in the bore. It was a little tricky but I got a pretty good fit.  If I was going to do this more frequently I would make something like this https://m.ebay.com/itm/The-ORIGINAL-Dremel-tool-holder-frame-metal-lathe-1-2-in-sq-shank-/361520655374?nav=SEARCH



Online irk miller

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Re: question for machinists
« Reply #18 on: Jan 31, 2018, 17:19:43 »
The problem I ran into is as the cut progresses the grinding stone wore down producing a slight taper in the bore. It was a little tricky but I got a pretty good fit.  If I was going to do this more frequently I would make something like this https://m.ebay.com/itm/The-ORIGINAL-Dremel-tool-holder-frame-metal-lathe-1-2-in-sq-shank-/361520655374?nav=SEARCH
Everyone should have a flex shaft anyway. They fit conveniently in a holder, or get the right size boring bar holder...






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Offline doc_rot

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Re: question for machinists
« Reply #19 on: Jan 31, 2018, 22:38:17 »
Everyone should have a flex shaft anyway. They fit conveniently in a holder, or get the right size boring bar holder...




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I have the right size boring bar, but even a fresh carbide insert wouldn't cut these bushings. They are the inner race for a needle bearing so they are probably 58-64 HRC
« Last Edit: Jan 31, 2018, 22:42:26 by doc_rot »