Attention Machinists

loudhornsrule · Apr 24, 2015

Can a machine shop make me a hub to fit this shaft? I can't find one. Roughly 4'' long 1 5X8 X 1 3/8 tapered shaft with 7'16 keyway. thanks

ArtMech · Apr 24, 2015

Yes, they can. In addition it needs to calculate a cone angle and required length of hub (not roughly, but exactly) minus gap between housing and a hub. Take into account a new hub is in line with the other hub(s) or pulley(s) on a machine.
https://www.easycalculation.com/trigonometry/triangle-angles.php
Have ordered that at the machine shops successfully a couple of times.

bigdeano · Apr 24, 2015

The hard part would be putting the keyway in on a taper. None of the places I worked had the equipment to do that.

ArtMech · Apr 24, 2015

The turner can do it.
He just looked if he has an extractor of required keyway dimension. I didn't see the process, but that was not a problem for him.

Kyle_in_Tex · Apr 24, 2015

What does it fit?

ArtMech · Apr 25, 2015

An extractor in this case is a special tool to put a keyway inside a hole.
I'm sorry for my English which probably confuses.

Walkin Horse · Apr 25, 2015

saracenas said:
An extractor in this case is a special tool to put a keyway inside a hole.
I'm sorry for my English which probably confuses.

Sorry. I was reading this and saw where you are from,and thought you mite be American living in Europe.

Kyle_in_Tex · Apr 25, 2015

saracenas said:
The turner can do it.
He just looked if he has an extractor of required keyway dimension. I didn't see the process, but that was not a problem for him.

That would be a broach. Need a tapered plug to press it thru.

Op, do you have the old hub? Show us a pic of it. My guess is that it will cost you some good money to get a 1 off custom hub made.

Chooglin · Apr 25, 2015

Putting the keyway in would be very simple,indicate the taper in and cut it with a end mill !!!

Kyle_in_Tex · Apr 25, 2015

Chooglin said:
Putting the keyway in would be very simple,indicate the taper in and cut it with a end mill !!!

Internally on a hub?

Where are you loudhornsrule? Did you find an alternate? How much would you be willing to pay?

CalG · Apr 25, 2015

A tapered bore with a key way would NOT be a difficult group of features to produce. A shaper would make the keyway a breeze

Chooglin · Apr 25, 2015

Kyle_in_Tex said:
Internally on a hub?

Where are you loudhornsrule? Did you find an alternate? How much would you be willing to pay?

My bad , I was thinking he needed a new spindle made !

the old grind · Apr 25, 2015

CalG said:
A tapered bore with a key way would NOT be a difficult group of features to produce. A shaper would make the keyway a breeze

I was ready to say that halfway thru' reading pg 1. :laughing: Could also be done on a mill or lathe (set up for shaper op) by any machinist. A keyway broach bushing could be cast of woods metal for a one-shot, too.

Tricky part would be duplicating the taper accurately with good surface finish. (1-2hrs, mostly setup) I'd expect most 'declines' to be based on cost/time to do both right.

Might turn an original shieve/sprocket into a hub and bolt/weld that to a bore in what's desired, depending on what's on hand that came off the shaft, of course. tog

loudhornsrule · Apr 26, 2015

I'm in north texas. It goes on a drilling rig that I am building. Probably just gonna weld a hub on there with a chain sprocket. I know I know Don't do it, but this is holding up my progress on this thing.

ArtMech · Apr 26, 2015

Kyle_in_Tex said:
That would be a broach. Need a tapered plug to press it thru.

Right. This is exactly what I had in mind. Thanks for training. :drink:

ArtMech · Apr 26, 2015

Walkin Horse said:
Sorry. I was reading this and saw where you are from,and thought you mite be American living in Europe.

It would be too much honour for me. :confused3:

flyerdan · Apr 26, 2015

Have you considered sourcing a hub for the motor? This isn't exact but I'd imagine that they all have the same taper so it should be adaptable. Hub for wheel motor.

loudhornsrule · Apr 26, 2015

Yeah, I ordered a couple random hubs from them, and nothing would work. Thanks

ArtMech · Apr 26, 2015

What if you'd bring a motor to a well doing machine shop and ask them to make a correct hub for it? Before that you need to know and to tell them a required hub's diameter and its thickness according to its being in line with the other hub(s) or pulley(s). Most shops in my area have employed the constructors and/or technologists to correct an order. I'm sure you may find one, or even much better, around you.