Machines | Making a Mandrel and Turning Between Centers
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Another step in making a set of flat belt pulleys for a J. A. Vance Planer Matcher restoration for the Georgia Museum of Agriculture. In this video, I will make a custom mandrel to turn the pulleys on the lathe between centers.
Comments
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good video/information
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Keith Fenner Has a Follower adapter on his Lathe I Think keith :) Hi from Australia
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Wott !!
No shoulder on the lathe chuck dead center ?
If the center gets pushed into the chuck under the pressure of the cut - things will get exciting.
Besides, with a shoulder, you can rechuck the center, give it a thump with a chunk of copper or aluminum, and get it to run true. -
perfect Keith
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the wise you milled the keyway, what brand is it...
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Why is lathing so fascinating to me!! I must know!
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Excellent work.... Really enjoy your style and also your skills at communicating the job and the methods used to us the viewers.
I'm looking to find a mandrel which used rubber O rings which expanded when compressed to hold the inside of a pipe when machining on centers. 1"1/2 pipe, 6'' long with a 4" circular plate welded in the middle. Brass bushing will be pressed at each end in the pipe as bearings and then the whole lot needs to be machined not to tolerance as much as to uniformity and to being concentric with a sprocket bolted onto the plate. Otherwise, how best would you hold something like this in a lathe? -
You say that you sent these parts out to be worked on by another shop, so that is just a few parts, not a large order. In my experience with small machine shops has been that they are always looking for large orders and seem annoyed by someone coming with with a small job. Is it really realistic for a small machine shop to really expect everyone who walks in to need 50 of something?
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I have a brown and sharp horizontal, and just look for an excuse to to use it, but I fully understand your logic.
God bless and keep the videos coming! -
Love watching your videos though I thought you would use the horizontal for the key way.
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Ha great trick with the fresh cut on the center.. I will use that for the shaft I need to make next week!
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Keith, I know that Index makes some of the best lathes but I have never seen an Index mill. Where did you find yours and how did you know that it was a keeper? Index lathes were the only approved capital equipment for Rolls-Royce North America although many managers skirted around the additional cost by purchasing Japanese equipment; at the expense of process control. Nice mill vise too. Thanks for the video.
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keith, enjoy your videos very much, am new to machine work, was wondering why you use the f style caliper instead of micrometer?
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so your saying you cant get a 4 jaw right on running true
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Oh well Keith at least Keith will be doing the job :)
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Did you cut the keyway in steps or all at once? I am sure Mr. Fenner will Get 'er done for you.
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The skill I have (or at least I like to think I do). What I am lacking is the proper piece of equipment needed to properly to do the job. Because the face of the pulley is multiple of curves, what I really need is a tracing attachment for my lathe to do it properly (or a CNC lathe). Which is why I an sending that part of the job out to Keith Fenner, who has a tracing attachment on his lathe.
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Keith, why did you not machine these yourself? You seem to have the skills...
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Fantastic Keith!!! I also learn a lot watching your videos. -Allen H.