Lathe tool rest arm cracked
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Lathe tool rest arm cracked
Was using the lathe a while back and the tool rest arm cracked. Sorry, no photo at the moment. The casting cracked where the tool rest inserts into the arm, from the clear hole on the side that was likely used for drilling/tapping the screw hole in the arm around to the top of the arm where the tool rest inserts into it. Basically the place on the arm with the most stresses when you're using the lathe. I showed this to my wife, who is on the FB owners group, and before I said anything she said someone over there had the same thing happen to them.
Honestly, this is pretty thin material for the amount of stresses that will be seen by it. Has anyone else been hit with this recently? I'd like to do some lathe work, but with this cracked I can't get the tool rest tightened down enough to keep it from spinning. I don't really want to spend another $40+s/h+tax on a new tool rest arm that'll just break in the same manner, as it seems to be a design flaw to have that hole on the end of the arm, but I also don't know if I want to spend $320+s/h+tax for something that is better constructed.
If someone has seen this, have you tried to repair it? I can't weld (tried, but it all looks like snot when I do it on steel), and this would require TIG welding, I believe, since this is an aluminum part. I don't think JB Weld would do a good job here, especially since the hole the tool rest sits in is widened out since the crack. I'm just at a loss as to what to do to see if I like lathe turning.
Honestly, this is pretty thin material for the amount of stresses that will be seen by it. Has anyone else been hit with this recently? I'd like to do some lathe work, but with this cracked I can't get the tool rest tightened down enough to keep it from spinning. I don't really want to spend another $40+s/h+tax on a new tool rest arm that'll just break in the same manner, as it seems to be a design flaw to have that hole on the end of the arm, but I also don't know if I want to spend $320+s/h+tax for something that is better constructed.
If someone has seen this, have you tried to repair it? I can't weld (tried, but it all looks like snot when I do it on steel), and this would require TIG welding, I believe, since this is an aluminum part. I don't think JB Weld would do a good job here, especially since the hole the tool rest sits in is widened out since the crack. I'm just at a loss as to what to do to see if I like lathe turning.
Mark 7 (new 2020 - pre-COVID) | 12" planer (new 2020 - pre-COVID) | 11" bandsaw | 4" jointer
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)
- JPG
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Re: Lathe tool rest arm cracked
I WAS going to suggest E-Bay, but things over there are apparently out of control!
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
- chiroindixon
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Re: Lathe tool rest arm cracked
Hmm. Perhaps this observation/hint from Scott will be some help.
At the 1:38 mark https://www.youtube.com/watch?v=rGnur6VzljA
Doc
At the 1:38 mark https://www.youtube.com/watch?v=rGnur6VzljA
Doc
Re: Lathe tool rest arm cracked
Question for one of the Model 10 guys, can the tool rest arm be used with a Mark 5/V/7 post? Is the tool rest arm cast iron? If yes to both, is the center to center distance from post hole to rest hole vertically and horizontally compatible with a Mark?
I have an old Greenie tool rest, and the hole in question was not present on those. They have the less-desirable threaded post and the post is not intended to be removed from the arm. Makes me wonder if the later Model 500 tool rest has the hole in question.(?)
- David
I have an old Greenie tool rest, and the hole in question was not present on those. They have the less-desirable threaded post and the post is not intended to be removed from the arm. Makes me wonder if the later Model 500 tool rest has the hole in question.(?)
- David
Re: Lathe tool rest arm cracked
Post deleted.
Last edited by rogersk on Thu Nov 30, 2023 11:49 pm, edited 1 time in total.
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Re: Lathe tool rest arm cracked
There is a larger hole in the tool rest arm opposite the set screw that holds the tool rest in place. I figured they did this to handle shorter length drill bit and tap for the manufacturing process, but it makes it weaker.
Mark 7 (new 2020 - pre-COVID) | 12" planer (new 2020 - pre-COVID) | 11" bandsaw | 4" jointer
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)
Re: Lathe tool rest arm cracked
Deleted post
Last edited by rogersk on Thu Nov 30, 2023 11:50 pm, edited 1 time in total.
- JPG
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- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Re: Lathe tool rest arm cracked
Model 10 arm IS cast iron. Length I think may be shorter. Post mount to the carriage is NOT compatible(smaller smooth shaft - uses collar for height control) Tool rest bore same as M5....
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
╟JPG ╢
╚═══╝
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Re: Lathe tool rest arm cracked
I saw this on YouTube. Looked like an interesting solution.
https://www.youtube.com/watch?v=PCV_8Obbt2s
https://www.youtube.com/watch?v=PCV_8Obbt2s
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- Gold Member
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- Joined: Tue Jan 07, 2020 7:49 am
- Location: outside of Houston, TX
Re: Lathe tool rest arm cracked
Where his broke is the same place mine did, just not nearly as bad. Took some pictures this morning. As you can see, the crack extends down both sides and leaves the tool rest just loose enough that it moves around even after you tighten the wing screw. It's cracked just enough that it's loose, but not quite enough to fall off. I do like the option in that last video, but again, I can't weld and I don't happen to have a piece of stock the right size to use for this purpose.
Mark 7 (new 2020 - pre-COVID) | 12" planer (new 2020 - pre-COVID) | 11" bandsaw | 4" jointer
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)
Grizzly G1023RLWX (new 2013) | Grizzly G0583Z (new 2012) | DeWALT DW618PK
Oneida Dust Deputy (on 5g bucket bolted to a 10g oil drum, used only with planer & jointer)