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Highpower (09-26-2015)
(09-26-2015, 08:34 AM)Kennyv Wrote: .... Any idea type of cutter I should use when I get around to this project ? ...
I'm assuming you're talking about a cutter to make the rack. Grind one from HSS and put it in a fly cutter and cut the rack teeth on the mill.
Ed
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The big question is if you still have the original ram in order to copy the tooth shape. I'm going to assume you don't.
Plan "A" would be to read in Machinery's Handbook about how to measure the mating gear to determine the pitch, pitch angle and/or module of the gear, then select a correct gear cutter and then cut the rack on your mill.
Plan "B" would be -- and I've never done this, so take it with a grain of salt -- roll the mating gear in a carefully prepared bed of modeling clay which you would measure for pitch and use to generate the hand-ground fly-cutter tool as Ed describes. Then you'd cut the rack on your mill.
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EdK (09-26-2015), Mayhem (09-26-2015)
I expect he could buy a couple of new complete arbor presses of that size, for the price of a single gear cutter.
Willie
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Cutting a rack on a vertical mill would be difficult. You'd have to stand the rack on end to cut the teeth.
When I made the racks for the CNC plasma table I cut them on the shaper. For a rack the teeth are straight sided at the pressure angle of the gear.
Free advice is worth exactly what you payed for it.
Greg