Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Model & Toy Steam Engines – Stirling Cycle – Flame Lickers – Small Antique Originals => Topic started by: Jim on April 19, 2019, 07:12:55 pm
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Super appreciate the help and advice everyone, thank you!
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interesting project Jim, I haven't started my Wilesco D320 project yet, but it has a cheaply replicated angle block transmission in it , which I intend to replace with a machined ,more precise transmission out of aluminum block with raced ball bearing axle supports , shouldn't be to difficult as long as you don't move the axis of the mill table when you flip it 90 degrees to drill the angled side.
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I’d think the losses through the bevel gears would be very low at this power level. That said there would likely be a lot of backlash in the mesh. Since it looks like you have two parallel shafts, why not drive them with belts and limit it to just one gear set? That could give you the chance to have different drive ration available as well.
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Thank you Daniel, very much appreciated. Lots to mull over now :)
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Certainly possible, but you'd be having a lot of lash/slop on the final RH shaft by doing it that way. It would definitely be considered best practice to drive the intermediate shaft instead, then having two idler arms to either side, but I gather that doesn't fit your desired design.
I'd say build the mock-up and see what you get, but I sure don't see any reason why it would be any undue problem the way you have it drawn.
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Thanks Daniel appreciate your insight very much. Gears etc are not my forte.
Do you think it would be possible to employ two sets (4 gears) as shown in this chicken scratch drawing below?
[attachimg=1]
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All gearing loses power Jim, but if all alignments and depthing are set up correctly, very little power is lost. Same is true of bevel gears, but getting the angle correct so depthing is the same across the whole interface of the gears can be a bit trickier than simple gearing.
Full disclaimer, I've not much done things along these lines with my own machining, but did do a fair amount of work on such, long ago and far away on gear-trains of prodigious proportions, working at the design level while watching them take shape out in the machine bays.
Generally speaking, when running at speed, the more gear "whine" or noise that you hear, the more power is being lost, but careful depthing and lapping are great at noise reduction.
For a regular 90, or other degree offset, toy steam transmission, I don't think you have much to worry about beyond simple binding from misalignment.
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Hi All,
I would like to make an angled transmission similar in principal to the Wilesco M50.
I've found numerous tapered bevel gears available on eBay -
https://www.ebay.com.au/b/Industrial-Bevel-Gears/181774/bn_16571977
Does anyone have an angled transmission? In use does is lose any power through those beveled gears or is it exactly the same as a straight transmission?