Opsoff1 no matter what some of these guys are saying, these prices are outrageous. This is just an asshole way of saying we don't want the job. That said there is a lot of work to making a gear so expect to pay. if you can make the blank EG will cut it for you at a fair price.The quote from a company (who shall remain nameless in order to protect their type of comedy) was $2,775 for 1 or up to 6. They offer different levels of delivery - and the price goes up exponentially. If I wanted it in 48hrs - it was $11,100. Not kidding... (as an aside - I paid $800 for this lathe back in 1994)
I do have another complete single tumbler gear box - it is an earlier model that has the idler gear supported by only one side - the gear is pressed on a stud with a keyway/pin and the stud rotates in the idler arm. It is a QCG-100 and mine is a QCG-101. The earlier one use steel bushings on the two shafts vice bronze for my current one.
I am refurbishing both - the earlier one is in exceptional condition - filthy but the wear is very very minimal. I considered modifying the gear - the early one uses a .500 dia hole vs the .682" for the current one, but that would effectively take the functionality away from the older box.
But for one gear a 27-gear could be bought to be used as an index
Easiest would be to machine the stock to the correct thickness and pop in two starter holes. Let the Wire EDM guy finish the bore and then come in and wire out the gear profile using the second starter hole. Done.If it was me, I'd machine some 4130/4140 to the right thickness, put in the correctly sized id hole, then find a wire edm shop to wire out the gear. There's a couple around here who could do it for a reasonable price.
Easiest would be to machine the stock to the correct thickness and pop in two starter holes. Let the Wire EDM guy finish the bore and then come in and wire out the gear profile using the second starter hole. Done.
Because its far easier to find an idle wire machine. Not a lot of idle gear shapers or hobbers in ready to work condition, with the necessary tooling for a 14dp, and fewer yet that have the necessary trained set up man ready to make such gear.
Thanks for this link. I almost didn't watch because of the BS at the beginning but I'm glad I did.
The rub with using a gear to index is you have to have a gear with the right number of teeth. At least it doesn't have to be the same tooth form or diameter.QT Guy: (I almost didn't watch because of the BS at the beginning but I'm glad I did.0
I added "skip the BS at 4:59," Thanks,
On a grinder, out of a work head, or between centers I would just use a snap finger set on a 17 gear or on a 17 index...yes making an arbor, fab the index, and grinding... Agree it likely would not be as fast as a shaper or hobber.
A slow way would be to use a lathe for a shaper by hand cranking the saddle left and right with the part (gear) on a stub arbor, or between centers...off an index.
Might have to make 100 (or more) travels for each tooth.