Gallery, Projects and General > The Design Shop
Bevel Gear Mill
vtsteam:
No, but I have patterns for casting one.
Found this on the Lathes.co.uk site:
Good to see at its most basic stationary and adjustable form.
I'll probably fabricate something of steel, though. and use clamps to attach to bench, instead of cast mass.
Joules:
Another thought is to design and build this to fit an arbour press. If anyone else is playing along...
There was a set of Cowells castings on ME, I was tempted at the price, but having the Elliot 10M I doubt I would build a hand operated machine, let alone find space for it.
:lol:
vtsteam:
The slides would have to be precise fitting -- they are basically ways in a shaper.
Thinking about this carefully, we only need about 3/4" of movement for the clapper slide. so the ways will be short. That means it's easier to achieve stiffness lengthwise. Could be double round bar stock ways.
vtsteam:
New day, woke up with some thoughts:
Hand shaper based: Will require vertical travel because a tooth space can't be cut in a single pass. Therefore we need both vertical and horizontal slides, complicating things.
Horizontal mill based: Could get away without a vertical slide with a multi-tooth cutter, cutting a tooth in a single pass. ..... and even possibly with a single tooth fly cutter with low feed rate. Does require complications of a motor and a spindle. Does require horizontal adjustment and rotary indexing.
Attachment for lathe: This defeats the original intention of a standalone machine, but is probably the simplest and most compact. I see it as just a simple angled indexing fixture, and a fly cutter or boring bar between centers. I have those. The only thing I'd have to make is the indexing fixture, and then grind a cutter.
And an update of specs on a standard gear of approximately the one I proposed:
1.5 modulus 15 tooth miter (90 degree, equal size) - I guess 20 degree pressure angle vs 14.5?
btw. this size is available on Ebay from China at pretty reasonable cost, but that defeats the pleasure of solving the problems of making them, and making a tool to do it. I did order a pair of gears for only ~$9 incl. shipping, just to see what they look like -- but they might take a month or so to get here.
Also, good reference for bevel gear calcs, in Section 4.4 :
https://khkgears.net/new/gear_knowledge/gear_technical_reference/calculation_gear_dimensions.html
awemawson:
Boil them when they arrive :bugeye:
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