Gallery, Projects and General > The Design Shop
Bevel Gear Mill
WeldingRod:
It looks like face milling spiral bevel gears is done with a shaped cutter (normally multi-tooth) moving in a circle and cutting on the end. Think hole saw. This is tipped and tilted to get the geometry to work. You plunge it in once per tooth space. It looks like a single tooth cutter would be ok, just slower metal removal.
Actually sounds pretty straightforward for what you are interested in. One setup, two cutter head angles for the right and left spirals you need, and tooth indexing.
This gets away from the tapered tooth generating problem nicely!
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vtsteam:
Look what came in the mail today! A brand new, in ancient metal cornered unopened box, still factory taped closed, inside Cosmolined, and anti-rust paper wrapped, National #5 20P bevel gear mill w/7/8" arbor hole.
I believe (not absolutely sure) that this will cut bevel gears in the size range and tooth count I'm interested in. Which is about an inch dia 16 tooth, more or less.
Even if it doesn't, it was way cool to just crack that box open for the first time after who knows how many years since manufactured! The first person to look inside and unwrap that little treasure! Fun.....! :ddb:
awemawson:
Well don't tease us man - open the box and SHOW us :clap:
Lew_Merrick_PE:
--- Quote from: WeldingRod on August 28, 2020, 10:17:04 PM ---I think spiral bevel gears can be hobbed... not totally sure, though!
--- End quote ---
Hi WeldingRod -- Yes, I served my Apprenticeship in a Tool & Die shop "across the alley" from Western Gear. Making hobs was a (moderately) common task. The set-up to use such hobs was fr from trivial. -- Lew
tom osselton:
OPEN THE DAM BOX ALREADY! :D Ebay find?
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