Gallery, Projects and General > Project Logs
Modifying a Southbend Headstock for Indexing
Divided he ad:
--- Quote ---Well, after several cases of beer
--- End quote ---
Mmmmm....Maybe that was before the first attempt? Maybe not?!! :)
Glad you sorted it out though, Would be a nightmare to have to make all that again!
Looks like it'll do the job nicely :thumbup:
Now..... Rounding the ends shouldn't be too difficult?! :dremel:
:D
Ralph.
sbwhart:
Nicely sorted Bernd.
Busing like that is something we done all the time when refurbishing worn machinery, makes them as good as new.
Cheers
Stew
Bernd:
Know what's nice about a save like that? It's the fact that you have a lot of maching into already and you really don't want to chuck it and start over. So you take a moment and use the gray matter to see if there's a way to save it.
Had the hole been done first, it probably would have wound up in the recycle bin. :)
Bernd
Bernd:
Next is getting the cotter clamp machined up and installed.
This is what it looks like once your all done boring out the hole. A small scallop has been bored into the cotter while the bore was being bored out. Both ends need to be trimmed off , a hole needs to be drilled through the center and the cotter needs to be cut in half right at the center of the scallop.
Using the rear mounted cut off holder.
A quick facing cut to clean up the face.
Cutting off the 1/2-13 threads on the other end.
I used two drills for the center hole. The first was #10 drill so I could tap a 1/4-28 thread. The second drill with the tape is a 17/64" (6.7mm) clearance drill half way thru.
Ready to be cut in half through the scalloped center.
The cut has been started. I'm using a "razor saw". The saw is a product of Exacto Tool company. The blade is approximately .015" (.4mm) thick.
After the part is cut in two the pieces go back in the lathe to have their ends faced off.
Next I turned down a piece of steel rod 5/16" (7.9mm) to .250" (6.35mm). This was very gummy steel. Didn't leave a very nice finish.
Next I set up to cut the 28 threads per inch and start cutting. I've just finish cutting the threads.
After trimming one end of the threaded rod it will be Locketited ® in the bottom part.
This is what it looks like assembled in the clamp plate.
And assembled on the index head.
Now all I need to do is make nice washer and nut like Darren has done for his tool post to finish off the cotter clamp. Then it will be on to round the ends off the aluminum block and start thinking about making a pin holding arrangement to go into the index plate.
Until next time.
Bernd
Darren:
Ahhhh !!!
The cogs are turning :bow:
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