Not sure what I want to do about these gears. I’d really like to get the shafts out. I may try a gear puller and see if that won’t work them loose. But then I’d still have to get them back in once I clean them up.
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1941 South Bend 13″ Lathe Restoration – Part 7 – Gear Train Disassembly
In this video, I disassemble and clean the main gear train. These gears take power from the spindle and feed the input to the quick change gear box that ultimately powers the lead screw. These gears also include the reversing lever that can disconnect power to the lead screw as well as reverse its direction. I wasn’t able to fully disassemble some of the gears since I don’t have a press large enough to press out a few gear shafts. I believe I can still clean all of the parts that need cleaned.
The top dial is for the cross slide on my 1941 South Bend lathe.
The top dial is for the cross slide on my 1941 South Bend lathe. The bottom one is for the compound. If you look close, you can see they are different scales. The cross slide feed screw was changed from the factory 10 threads per inch with an indirect reading dial, to an 8 thread per inch screw with an direct reading dial. For the cross slide, the direct reading dial is a little easier to work with. For every turn of the handle, the tool moves in 0.125 inches, but would REMOVE 0.250 inches off the diameter. You would rarely, if ever, measure the RADIUS of the part you are turning, so this configuration makes the math much easier.
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1941 South Bend 13″ Lathe Restoration – Part 6 – Cross slide tear down
Next in the disassembly and teardown queue for this lathe was the cross slide. Only a few pieces to it. This lathe had been retrofitted with a larger 250 thousands dial, thus the feed screw and nut were “adapted” for an 8 TPI threaded screw. No real surprises here, except for the dial locking screw was not what it should be. I’m replacing it with a knurled thumb screw and a brass shoe after everything is painted.
I disassembled the cross slide on my 80 year old metal working lathe.
I disassembled the cross slide on my 80 year old metal working lathe. Lots of little pieces, and some that were just plain wrong.
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Sneak peek of how the reversing lever is turning out.
Sneak peek of how the reversing lever is turning out. I’m dropping a video on YT this Friday of the teardown of the main gear train on my 80 year old lathe.
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Hard to believe it’s been two years since the workshop was framed and roofed.
Hard to believe it’s been two years since the workshop was framed and roofed. A lot has changed since this photo. And it’s planned usage changed a bit, too. For what was meant to be a combination workshop/winter Jeep storage is now becoming a fulltime workshop. No room for the Jeep with the addition of the lathe, and a future vertical mill.
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Another year I will NOT be going to Moab. Oh well.
1941 South Bend 13″ Lathe Restoration – Part 5 – Compound Disassembly
Started the tear down of the carriage with the compound. The compounds sits atop the cross slide and serves to add another layer of control when cutting on a lathe (i.e. tapers, screwcutting, etc.). I’m just covering the disassembly in this video. I’ll paint it before it goes back together.
Picked up this 80 year old copy of the Machinery’s Handbook.
Picked up this 80 year old copy of the Machinery’s Handbook. This has charts, data, and specifications on just about anything you would need to make on a lathe or other machines. Things like how deep the threads for a 1-7/8″-8 spindle would be. A must have for any budding machinist. And I specifically wanted an edition as old as my lathe, for nostalgia more than anything.
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