PDA

View Full Version : Rescue of a walker drive line shaper


Christopher Herzog
10-08-2023, 10:06 PM
Local auction compulsive buy. Thinking it dates to 1927. Spent a weekend cleaning out wasp nests from years gone by. Old motor ran for a bit but had a massive nest in it. Wiring was rotten and needed scraped. Found another, it had bad bearings and also scraped. Motor three was fine aside from the shaft being 5/8, old was 1/2". Thought how hard can it be to enlarge the hole. Well, $28 later i owned a 5/8" milling drill bit and got that squared away. Picked up a few cutters and really looking forward to seeing this back in use. Probably needs a guard over that motor/pulley/belt in the future? I did build it the box, rewired it with a modern on/off switch and grounded power feeding wire. Attached is the before and current state.

Really enjoyed the project so far. My wife and check book, not so much....

Chris508740508741
Christopher Herzog
10-08-2023, 10:17 PM
Couple other things:

It is missing a nut on one post. It is a 1/2" 24 tpi, good luck walking in a store and finding that. Found one on line for 57 cents, it also requires $12 shipping. Have not been able to get that taken care of yet. My local hardware store swore they had it and thought metric was the answer. I was like in 1927 they were not doing much in the USA with metric.

Owners manual, unable to find it in the estate.
Anyone have one? Asking for a friend :)
Bill Dufour
10-08-2023, 10:38 PM
Some car lug nuts are 1/2-20. I suppose there may be 1/2-24 lug nut as well? That thread also strikes a bell for grinding wheel nuts.
Good job on the pulley boring. I would have used an expanding reamer.
Bill D
Christopher Herzog
10-08-2023, 11:18 PM
13 tpi are standard course threads and 20 tpi are standard fine threads. The 24 tpi must have been common "back in the day". I have heard Fastenal came get them, just need to travel a ways to go to one. It is not a life or death thing, god knows when it was last on there? I bought the only 5/8" bit in town, 1/2 is the largest common size. We just don't have much to pick from in my local stores.
Bill Dufour
10-09-2023, 11:12 AM
In my experience 1/2-13 is the largest nut you can make and tap with just hand tools. I would think 1/2-24 would be harder to cut. I see 1/2-24 taps on the bay but they cost about $10. So cheaper and much easier to just buy one nut.
That shows me 1/2-24 is a common thread. I saw it is used for tubing connections, maybe flare nuts? Seems to be for 5/16 tube? You could buy a flare/compression nut and hacksaw off or drill out the part you do not need.
Bill D

They are out there, This also says NPT?
https://www.mscdirect.com/product/details/55508105

https://www.amazon.com/Dixon-Straight-Compression-Fitting-61CL-05/dp/B00LTZ3TEE