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Tailstock mechanism problem

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Forum topic by kmetzger posted 07-21-2015 12:27 AM 798 views 0 times favorited 5 replies Add to Favorites Watch
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kmetzger

157 posts in 1654 days


07-21-2015 12:27 AM

My lathe is a knock-off of the Grizzly GO462. There are plenty of “cons” to it, such as a minimum speed of 600 rpm, but it’s what I’ve got and I won’t be able to afford a better one in the near future. I’ve made it work for me, and except for one serious problem I’m happy with it. The serious problem has to do with the cheap tailstock mechanism. The first thing that gave out was the left shoulder for the groove for the set screw is stripped out. A local machinist welded ring onto it, and I was in business again.
But now the set screw is wearing out, making it more and more difficult to get a good tight hold on blanks. it’s a 5/16” set screw with a flat part on the bottom that fits into the groove. I shouldn’t have a problem finding the right size set screw, but probably not one with a flat bottom.
I wouldn’t know how to file the bottom without damaging the threads. Can anyone think of a solution?

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25


5 replies so far

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MrUnix

5992 posts in 2035 days


#1 posted 07-21-2015 12:34 AM

Bench grinder followed up with a needle file to clean up the threads if needed. Doesn’t seem like much of a problem really.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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REO

923 posts in 1910 days


#2 posted 07-21-2015 12:39 AM

double nut the threads: (put on two nuts and tighten them against each other) and clamp the the nuts in the vice. file away the thread using the side of the nut as a guide to keep you off the threads you want to save.

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TheDane

5328 posts in 3499 days


#3 posted 07-21-2015 01:45 PM

Kim … could you use a ratchet handle ( http://www.grizzly.com/products/Ratcheting-Handles-5-16-18-Male-Long/G7327 ) instead?

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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Ripthorn

1454 posts in 2821 days


#4 posted 07-21-2015 01:52 PM

I grind down bolts and screws a lot. I put a nut on the piece, grind it down, then thread the bolt off. It tends to clean up the threads fairly well. A light hit with some 120 grit or so and it’s ready to go.

-- Brian T. - Exact science is not an exact science

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kmetzger

157 posts in 1654 days


#5 posted 08-09-2015 12:41 PM

Sorry for getting back late, but I just want to thank everyone for their suggestions. I refiled the set screw and it works fine for holding blanks in the lathe. What I’m not going to do any more is use the tailstock for boring. This chintzy mechanism just isn’t made for applying strong pressure. I’ll use the drill press from now on.

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25

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