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Re: Drive Coupler Not Staying Engaged, Craftsman 101.21200 MK2


 

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Glad yer gettin the machine back on track . The spring that ya removed may not be the original spring to yer lathe . I've always been amazed at the hack job's some folks do to their precision lathes & mills . They don't have time to do it right but they have plenty of time to do it twice . Ya have good discipline . It's too bad that Hank spoiled it to where ya couldn't share your process over on the 618 group .?

Making springs is one thing I want to learn how to do . I can kinda make one but I want to be able to make them right . I had a bud that when he left the Army he grabbed some 1911 parts & one of them was a new recoil spring , it had probably 3 more coils, at least that many more than the one in my 1911 had . I didn't get to shoot it for a couple of weeks & hell? when I got to the range I could barely rack the slide . We never found where he put my original spring , it's probably way under a bench 3 garages ago . Murphy said it right when it came to ball bearings & springs , when ya remove one it automatically goes straight to the darkest, furthest & hardest to get to corners of yer work shop . I think I ended up cutting 4-5 coils off that recoil spring 1/2 of a coil at a time & still it was way too hard to operate . I finally bought a handful different ones at a gun show & finally got it back in top form .

thanks

animal

On 2/22/24 1:17 PM, Rick Kruger wrote:

Replacement ball detent kits arrived a while back but just now got around to trying it out.? This kit may be "new" but I think it is not "factory".? All I know for sure, the spring is not the same as what was in my lathe's coupler.? Wire diameter on my spring is 0.020".? Diameter of the two "replacement" springs are 0.015".? On the right is my spring, left is the replacement.? I'm didn't even try them.?



I had ordered some springs from McMaster-Carr as well; longer ones and thicker wire, 0.022".? Clipped one, one more spiral longer than the one that came out of my coupler and after having lost one steel ball, got it back together.? Coordinating depressing the ball/spring and aligning the coupler key slot with the key took me a few tries.? Shiny spring on the left is the one I used.? Middle is the original, two on the left, the replacements.?








The McMC spring seems to be doing the trick.? It is noticeably stronger but did slip out a few times just after being installed.? Didn't with the lathe just running at top speed, but did when load was applied to the spindle.? After a while, that ceased and it is now remaining engaged after allowing the lathe to run unloaded a while and then trying it with load.? Likely will be just fine as I don't know what I'd do putting much load on it at that top speed.?

Unless something else happens, I consider this issue resolved.? Thanks for the assistance.

Rick

On 1/19/2024 6:15 AM, Bill in OKC too via groups.io wrote:
It's a good question.??

about $18 including shipping on eBay. Believe it's the same seller who sold me the replacement felts for my headstock, and the wipers for the bed.?

Bill in OKC?

William R. Meyers, MSgt, USAF(Ret.)

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