I was given a craftsman 101 27430 12 in. lathe with quick change gears in excellent shape and runs great,been learning to use the lathe.Appreciate all the youtube videos.As I was cutting some threads the gears started jumping on the Quadrant so I pulled it apart and noticed a crack on the Quadrant.Been trying to find a new or used quadrant on ebay an have been unsuccessful would appreciate any help as to where I might look.
have the equipment needed . Got any trade schools in your area that teach welding ? Could be a class project and if they mess it up ... well you already have one you can't use so you're really no worse off .
-jsw
ot
You might also say where you are located. There might be some soul on RCM that is close enough to you that they could help. Another option is to ma ke one. If I recall correctly you could either hog one out of a piece of pl ate or make a weldment.
Dan
You might also say where you are located. There might be some soul on RCM that is close enough to you that they could help. Another option is to make one. If I recall correctly you could either hog one out of a piece of plate or make a weldment.
Dan
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The broken part will be very helpful to make and align a fixture to hold the blank.
replying to dcaster, Tony Robles wrote: sacramento,have a friend going to stop by to see if he can weld it up for me
replying to Jim Wilkins, Tony Robles wrote: tried this site an it said not available and there is no replacement for it
$295 - yikes! Definitely need to consider repair. Welding, of course, but brazing would likely be enough. Compared to $295 for a new one, taking it to a professional would be cheap.
replying to Bob Engelhardt, Tony Robles wrote: my friend picked it up who is a welder by trade ,thinks he might be able to repair it,should know something by monday.Thanks for the input
replying to Jim Wilkins, Tony Robles wrote: been 40 years since I've done any actual welding but do have a good friend who's trade is welding and took the part with him,will know by monday
I don't remember if the quadrant on that lathe is zinc or cast iron. If cast iron any competent welder can either TIG braze or braze using a torch. The part is small enough that it would be easy to heat the entire part hot enough so that the brazing operation wouldn't lead to cracking. If the part is zinc there is available online a soldering alloy that works very well on zinc alloys. Pure zinc can be soldered with rod available from the hardware store. Done properly the soldered repair will be just as strong as the original part. All you need besides the rod is a propane torch. Eric
replying to etpm, Tony Robles wrote: thank you,I'll find out monday when my buddy gets back to .I'll relay the info.
Hard to believe any Atlas part is not on ebay. I had more luck searching on "Atlas lathe banjo"
From the picture here
If the straight slot comes out too wide to restrain the square on the carriage bolt #7 a hex head could be undercut with a longer step.
-jsw
Well I am in Delaware, so not very close. But if you do not come up with a reasonable repair, let me know. I am not too far from a foundry ( cat tai l foundry ) and could get a replacement cast. I have not done this before so there would be a learning curve for me. And would not be too speedy. I think they only cast about once a month.
Dan
Well I am in Delaware, so not very close. But if you do not come up with a reasonable repair, let me know. I am not too far from a foundry ( cat tail foundry ) and could get a replacement cast. I have not done this before so there would be a learning curve for me. And would not be too speedy. I think they only cast about once a month.
Dan
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It would be easy to make a functional steel copy with a bandsaw to cut the blank and a milling machine for the holes and slots. The copy doesn't have to be a precise duplicate; the user manually adjusts gear engagement on the quadrant by moving the studs, and the mesh to the spindle gear by rotating and clamping the whole assembly.
-jsw
replying to dcaster, Tony Robles wrote: ok,thank you
replying to Jim Wilkins, Tony Robles wrote: picked this lathe up from my stepfather,he also has a milling machine that I will eventually get but it is all the way up in seattle and his health is poor ,but I' not in any hurry for that to happen,I should still have time to learn that machine when that time comes.never to old to learn.in the mean time we'll see how this goes.thanks
replying to Bob Engelhardt, Tony Robles wrote: I did finally find this one for 295 and you are correct,yikes!
Sorry I didn't follow this whole thread, but I guess you have the idea that welding cast iron is problematic and you'll get a wide range of opinions about how it should be done. Weldors who can do it *reliably* are not that common, although people I've interviewed at Lincoln and Miller tell me that a simple job like yours can be done by most people using arc welding and nickel rods. Several other methods can work, but they require more expertise.
I agree with Jim. It's a simple piece that you could make out of mild steel. I'd have it roughed out by someone who's good with a plasma cutter (most commercial weldors) and then I'd drill and grind the slots. Space the drilled holes so you can go back and drill *between* them, overlapping the holes on each side, and you'll get most of the metal out of there before you grind and/or file. Filing to finish work like that is easier than you might think.
The result would be stronger and much more dependable.
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