12 spline 1" shaft adapter help

[MossRoad]

I have a lead on a motor with a 12 spline 1" diameter shaft, however, I can't seem to find a 12 spline 1" female coupling anywhere that I can weld onto a more standard shaft. Anyone have any sources? Thanks. :thumbsup:

 

[jmc]

When I was looking for a long section of 1 3/8" - 6 PTO shaft, I found a company that could custom roll it by the bar but the helpful person there referred me to a small company that already stocked it. Probably a customer of his. That small company never showed up on a search.

I your case, you might search for a company that makes spline broaches and see if they can refer you to someone that stocks your spline.

Good luck.

 

[pmsmechanic]

Ok so this is just me thinking again. How long are the splines? Are they exactly an inch od? How much exposed shaft behind the splines? What size hp wise is the motor?

If a taper lock hub fits well enough to grip the splines then that would be an option. Either cut down a piece of key stock to fit into a spline or take a die grinder with a cut off disc and cut a key way into the shaft. If you JB Weld the taper lock hub on to the shaft it won't loosen up and come off.

If there is enough shaft behind the splines just cut them off. I imagine that the shaft behind the splines is a standard size. Use a die grinder to cut a key way into the shaft and you are good to go. I try to do a nice job when cutting key ways like this but I find JB Weld does a very adequate job of compensating for my hand held imperfections.

 

[franklin2]

I was almost in this situation. I got a electric motor out of a forklift for a electric truck project. Luckily the guy gave me the whole motor/axle assembly as the motor had a oddball spline on the shaft. I had to take the whole axle apart and get the pinion gear out of it that had the splines on the id, and then turn the od of the gear down to make a adapter out of it.

 

[PILOON]

Don't give up searching but I have seen a variety of adapters out there on the net at one time or another.
Sorry that I can't provide a specific lead as I did not bookmark them.

 

[oldpilgrim]

I got one a few years ago but I can't remember from where.

I think it was from a site listed on yesterday's tractors.

 

[Tractor Seabee]

Are you sure you counted right? Standard splined shafts are either 11 or 13 splines in that count span. Most 1" dia I have seen listed are 15 splines. Having one made is probably a cost non-starter. Here is some info , there are many options and they are not interchangeable.

Parallel key spline: where the sides of the equally spaced grooves are parallel in both directions, radial and axial.

Involute spline: where the sides of the equally spaced grooves are involute, as with an involute gear, but not as tall. The curves increase strength by decreasing stress concentrations.

Crowned splines: where the sides of the equally spaced grooves are usually involute, but the male teeth are modified to allow for misalignment.

Serrations: where the sides of the equally spaced grooves form a "V". These are used on small-diameter shafts.

Helical splines: where the equally spaced grooves form a helix about the shaft. The sides may be parallel or involute. This can either minimize stress concentrations for a stationary joint under high load, or allow for rotary and linear motion between the parts.

Ball splines: where the 'teeth' of the outer part are implemented with a ball bearing to allow for free linear motion even under high torque.

The other recommendations posted appear feasible if trying for the economic solution. Did you ask the motor owner if they had what was attached to the shaft?

Ron

 

[MossRoad]

Yes, its a 12 spline 1" shaft, not 13. That is probably why the motor is so cheap... no one can find an application for it without costly modification.

 

[Tractor Seabee]

A new thought; disassemble the motor and take the rotor to a machine shop and have them turn the shaft down to 7/8 or 3/4 and cut a keyway. Some old retired guy may do for less than $100.

Ron

 

[MossRoad]

A new thought; disassemble the motor and take the rotor to a machine shop and have them turn the shaft down to 7/8 or 3/4 and cut a keyway. Some old retired guy may do for less than $100.

Ron

Yep, that's definitely an option. However, if I can find an adapter already made, that will be a much better solution for me. Thanks, though. :thumbsup: