- Joined
- Feb 2, 2013
- Messages
- 3,627
I had an itch to scratch. a simple task but one that i wanted to do for awhile.
i wanted to make an extended lathe chuck wrench for my Hercus ARH Lathe.
the 3 jaw chuck is beautiful, but if the jaws are extended out,
you can bust a knuckle because of a short chuck wrench.
don't ask how i know this.....
i have lots of scrap 16mm 304 stainless steel axles, that i cut down and repurpose for projects like this
here is the perptrator,
a beautifully seductive 1976 Hercus ARH, named Shiela
http://www.hobby-machinist.com/threads/hercus-9-workshop-lathe-model-arh-serial-15548v.24143/
i already have a fully functioning chuck wrench. but the overall length is a little bit short.
i parted an eyeballed length of 6" of 304 stainless steel from a donor shaft, and went to work...
the original wrench had a slightly smaller diameter for the main shaft, .594" mine was 16mm.
i turned the stub and stepped the end down to down to .390" .
I chucked the rod into a 5/8 5C collet (boy that was a tight fit) and inserted the collet into a square collet block for a trip to the mill.
i milled the square to a very nice- near push, fit.
.313" final square measurement
here is a shot before the deburring
i crossdrilled and then reamed the mainshaft to 5/16" for a 8mm (.3149") 304 Stainless rod, (also reclaimed from machine axles)
i turned just under 1/2 of the crosspin's length to .311"
and used a few blows from a hammer to set the crosspin in place with a nice press fit
and the finished product!!!
it was a simple project, but still gratifying- no more knuckles busted by jaws sticking up.
as always thanks for reading!
i wanted to make an extended lathe chuck wrench for my Hercus ARH Lathe.
the 3 jaw chuck is beautiful, but if the jaws are extended out,
you can bust a knuckle because of a short chuck wrench.
don't ask how i know this.....
i have lots of scrap 16mm 304 stainless steel axles, that i cut down and repurpose for projects like this
here is the perptrator,
a beautifully seductive 1976 Hercus ARH, named Shiela
http://www.hobby-machinist.com/threads/hercus-9-workshop-lathe-model-arh-serial-15548v.24143/
i already have a fully functioning chuck wrench. but the overall length is a little bit short.
i parted an eyeballed length of 6" of 304 stainless steel from a donor shaft, and went to work...
the original wrench had a slightly smaller diameter for the main shaft, .594" mine was 16mm.
i turned the stub and stepped the end down to down to .390" .
I chucked the rod into a 5/8 5C collet (boy that was a tight fit) and inserted the collet into a square collet block for a trip to the mill.
i milled the square to a very nice- near push, fit.
.313" final square measurement
here is a shot before the deburring
i crossdrilled and then reamed the mainshaft to 5/16" for a 8mm (.3149") 304 Stainless rod, (also reclaimed from machine axles)
i turned just under 1/2 of the crosspin's length to .311"
and used a few blows from a hammer to set the crosspin in place with a nice press fit
and the finished product!!!
it was a simple project, but still gratifying- no more knuckles busted by jaws sticking up.
as always thanks for reading!
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