Gearbox

Mark Anderson · Nov 8, 2024

I need to build a 2:1 gear box and am having a hard time sourcing stock gears. Lohring gave me a water brake that is rated at 9,000 rpm that I want to use for some steady state testing, and I just enjoy building stuff. I will use it to test Gas engines so if i can gear it 2:1 I think it will be good. Anyone have a source for gears before I tool up to make them?

RaceMechaniX · Nov 8, 2024

Mark,

You might search for gears from the 1/5th scale gas spur gears from the Baja and other cars. There is probably a heathy aftermarket for steel spur gears

Grimracer · Nov 8, 2024

https://sdp-si.com/

the german · Nov 8, 2024

Mark
Here is a good website for gears. Just search for "spur gears".
https://www.norelemusa.com/

Alex

John Beardslee · Nov 8, 2024

RaceMechaniX said:
Mark,

You might search for gears from the 1/5th scale gas spur gears from the Baja and other cars. There is probably a heathy aftermarket for steel spur gears

Preferably shaved crown if available. They handle the higher rpm much better.

Mark Anderson · Nov 8, 2024

Tyler
That was my first thought, but could not find a combination that got me 2:1. I will look at some of the other suggestions.

John Beardslee · Nov 8, 2024

Mark
Have you checked out McMaster Carr?

Alan Elzer · Nov 9, 2024

Definitely where Mike Z suggested. They have 10,000's of stuff. Email or call them for suggestions to meet your uses & then ask for samples they're free.

ianfolkson · Nov 9, 2024

Alan Elzer said:
Definitely where Mike Z suggested. They have 10,000's of stuff. Email or call them for suggestions to meet your uses & then ask for samples they're free.

I use mod 1 model car gears. Most are hardened. Not so easy to machine for engine cone but slowly and a sharp tool it can be done.

Grimracer · Nov 9, 2024

Alan Elzer said:
Definitely where Mike Z suggested. They have 10,000's of stuff. Email or call them for suggestions to meet your uses & then ask for samples they're free.

we use this company for RC helicopter design parts.. gears, shafts.. you name it

LohringMiller · Nov 9, 2024

I have a large supply of RC car gears that I was going to use on an opposed piston engine. They are hardened and will need custom hubs. Call me.

Lohring Miller

LohringMiller · Nov 9, 2024

You might also consider a toothed belt drive. Its life will be short by industrial standards, but it should be fine for this use. look at https://sdp-si.com/products/Timing-Belt-Pulleys/index.php

Lohring Miller

Terry Keeley · Nov 9, 2024

https://www.prestwich.ndirect.co.uk/gearbox21.htm

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