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welder asking a machinist question.
I am a welder and decided to build instead of buy a wood shaper. I been trying to get on a machinist forum and ask a question but they are taking too long to register me. All I need to know is if I can turn down a shaft with a keyway already cut in it. I think I tried this one time and just broke a lot of tools. Please help. And thanks.
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Re: welder asking a machinist question.
Originally Posted by
Welderskelter
I am a welder and decided to build instead of buy a wood shaper. I been trying to get on a machinist forum and ask a question but they are taking too long to register me. All I need to know is if I can turn down a shaft with a keyway already cut in it. I think I tried this one time and just broke a lot of tools. Please help. And thanks.
What type of cutter were you using to turn the shaft with a key way in it? Hope it was HSS, not carbide. Carbide does not like interrupted cuts. They tend to chip.
Chris
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Re: welder asking a machinist question.
I will try with a high speed steel then. Maybe that was what I was doing wrong then. Thanks.
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Re: welder asking a machinist question.
I agree that a high speed tool will generally work a little better with interrupted cuts. Some other things to keep in mind are rigidity of lathe and shaft, how far out of the chuck the shaft is protruding, whether or not it is supported by the tail stock, and depth of cut.
If you keep having difficulties, and it appears that the interrupted cut is causing them, you could try installing a key in the keyway. Maybe use some super glue or placing a small tack at each end of the key. Then take an angle grinder and grind it down flush with the shaft. At that point you have outwitted the interrupted cut.
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Re: welder asking a machinist question.
I need a photo of your problem.
I do have background in the machine shop work too.
Dave
Originally Posted by
Welderskelter
I am a welder and decided to build instead of buy a wood shaper. I been trying to get on a machinist forum and ask a question but they are taking too long to register me. All I need to know is if I can turn down a shaft with a keyway already cut in it. I think I tried this one time and just broke a lot of tools. Please help. And thanks.
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Re: welder asking a machinist question.
What material i is it made from ? How much to you need to take off ? If its like a 1045 steel it should be no problem, if its a hardened 4140, or Thompson shaft, it might be cheaper to by a new shaft in a easy to machine material. I just opened up the bore of these sprockets with a carbide boring bit. Its an old clapped out Logan lathe, very loose, but good enough for emergency work. Thought I would break the carbide bit on the keyway, but never did. Just went really slow with sharp bit
Good luck and don't forget to post up some pics of you build.
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Re: welder asking a machinist question.
Thanks guys. I will have to try again as soon as it warms up again. Its 20 below this morning and it takes a lot of wood to warm up the lathe. Ha My lathe is an old advance. She needs a lot of work and I am no machinist. But once in a while I try. Glad I have you guys and youtube.
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Re: welder asking a machinist question.
Originally Posted by
Welderskelter
Thanks guys. I will have to try again as soon as it warms up again. Its 20 below this morning and it takes a lot of wood to warm up the lathe. Ha My lathe is an old advance. She needs a lot of work and I am no machinist. But once in a while I try. Glad I have you guys and youtube.
What exactly are you trying to do? Build a industrial shaper 1 1/4" arbor with a big motor, or a home shop unit with a 1/2" or 3/4" arbor?
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Re: welder asking a machinist question.
stoneaxe, I am going to try to make a 3/4 in. one with probably a 2 hp motor. If I cant find a 2hp. I may wind up with a gas engine on it.
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Re: welder asking a machinist question.
Originally Posted by
Welderskelter
Its 20 below th.
that temp certainly aint helping matters. i knew a surplus dealer, that said whjle in alaska, they'd warm the forks up on a lift w/ a rosebud before putting the forklift too work.
whatt caught my eye, is ur screeename, i like it
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Re: welder asking a machinist question.
Originally Posted by
Welderskelter
stoneaxe, I am going to try to make a 3/4 in. one with probably a 2 hp motor. If I cant find a 2hp. I may wind up with a gas engine on it.
If you are going to make money with it, or are a hobby woodworker, just buy one- they are a dime a dozen in that class.
Any cutter that is going on a 3/4" arbor on will not need too much power. Like these.
https://seattle.craigslist.org/see/t...416354046.html
https://seattle.craigslist.org/see/t...415468929.html
If it is just a project for fun, start with some good metal - I don't know what sort of steel, the arbors I have made for machine tools were 1144 stressproof, somewhat soft, but forgiving and I am not a 8 hr a day machinist, so not worried about wear. And they are turning way slower than a wood shaper. Remember if the shaper spindle lets go, your testicles will also go by-by very shortly after. A pound or two of steel at 6,000 rpm at waist level......
forget the gas engine- vibration is the end of a good cut- shaper spindles need accuracy , in diameter, run-out, bearings and pulleys.
In all honesty, if you are having trouble machining a shaft because of a keyway, it might be best to get some professional hands on help with design and materials. - shapers are great tools, and also very unforgiving. Not trying to be a jerk, just realistic about the machining level of this project.
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Re: welder asking a machinist question.
High speed and a light cut will get past that keyway.
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Re: welder asking a machinist question.
stoneaxe. Thanks for your concern about my safety. Master welder I will try that. Thanks to all of you for your help