Bandsaw worm gear

[jgimp69]

So I have the typical 4x6 busybee bandsaw so many of us have and the brass gear has pretty worn all the teeth off. I've never cut a gear before but figured I would try. I would first turn a worm from 4140 to the same dimensions as my bandsaw worm. I would then cut 4 or 6 reliefs in it and then harden it. I would then toss the worm back into my lathe and then my gear blank onto a thrust bearing/rotating mount in my toolpost and slowly feed the gear blank into the spinning worm and watch as it gleefully spins away forming a perfectly viable and usable gear.
Any issues or advice, or am I on crack and should I just fork over the $80 for a new gear off Amazon and hope it fits?

 

[Proxule]

I am here to learn, Nothing useful to add sadly, Gluck

 

[Doggggboy]

If you're into 3d printing you could try that route for dirt cheap. F360 has a plugin that will spit out worm gears I think.
Aliexpress has a good selection of cheap gears as well.

 

[Mike R]

have a go at it, about 1/3 the way down this page is someone making a homemade worm gear, can read how he did it.
https://www.modelenginemaker.com/index.php/topic,12310.150.html

My only concern is that a brass blank would cost me $80 around here - its priced like its colour - gold!

 

[DPittman]

have a go at it, about 1/3 the way down this page is someone making a homemade worm gear, can read how he did it.
https://www.modelenginemaker.com/index.php/topic,12310.150.html

My only concern is that a brass blank would cost me $80 around here - its priced like its colour - gold!

What size of brass do ya need?

 

[jgimp69]

What size of brass do ya need?

Brass gear measures out at 1-7/8" diameter, 20 teeth, 20 degree PA, 12 DP. RH turn I believe

I have lots of brass to waste into the scrap pile trying this. Just looking for opinions.

I also thought about machining up a 20 position plate for my indexer and getting a set of gear cutters off Amazon and doing it on the mill.

 

[jgimp69]

have a go at it, about 1/3 the way down this page is someone making a homemade worm gear, can read how he did it.
https://www.modelenginemaker.com/index.php/topic,12310.150.html

My only concern is that a brass blank would cost me $80 around here - its priced like its colour - gold!

Jeez, where must you live if material is priced like that?

 

[DPittman]

Brass gear measures out at 1-7/8" diameter, 20 teeth, 20 degree PA, 12 DP. RH turn I believe

I have lots of brass to waste into the scrap pile trying this. Just looking for opinions.

I also thought about machining up a 20 position plate for my indexer and getting a set of gear cutters off Amazon and doing it on the mill.

Well I have some 2" if you find you need some.