Need a Frame 56 size motor pulley

You seem overlooked that I demonstrated the correct taper lock bush and pulley (i.e. 22mm 'long', to fit the length of your shaft) are available. Just call a good industrial supplier and ensure they understand the limiting factor is the axial length. The products are available. You just need to specify correctly.

Hi Ian

Everything is available at a price but I could easily start to haemmorhage cash on this, and that is not a word I would usually attempt without a spell checker.

Here's an idea. I make a false nose for the motor shaft to extend it at a larger diameter and then Taperlock the pulley to that.

The new plan means buying an 11mm reamer and a 4mm broach but I can then change the pulley to fit the desgn rather than change the design to fit the pulley.

I need to get back in control of the design. Right now it is all drawing and shopping, I want to do some measuring and cutting.

Robin

Ha, too easy to "engineer" in front of a computer screen! I know that one!

It just so happened that I bought a couple of taper lock pulleys only last week, so that's why I'm specced up on them. I was really surprised how cheap they were - from the major trade-industrial supplier here too - the one with the usually-scary prices. Two bushes and two pulleys (1210 size) for $40 which is about £23.

Better to have a reamer and broach hanging around than a disused pulley - good plan!

Have you actually spun up a Taperlock pulley? Andrew Tinsley said they are neither accurate nor repeatable which is not encouraging.

The other pulley in the pair connects to a hardened and ground shaft with no trace of key, Woodruff or otherwise.

It's a grinder so load is minimal but accurate and repeatable are more than a bit desireable, Obviously I need minimal vibration, which is why I am fighting to fit this dinky 1/3 hp cap run motor.

I saw that, but I think this is a reference to the concentricity run-out on the taper - possibly an issue in large diameter lower-quality taper-locks, but unlikely to be a problem in the wee little ones we're talking about. There is widespread industrial use now of taperlocks - if they were no good (i.e. maintenance = cost money) they would have disappeared. Also, note in uniformly-loaded low-service factor situations they don't need a key (see Fenner Drives link below), i.e. unless your torque overwhelms the shrink-fit-like grip that the taper exerts on the hub, or you have high dynamic loadings. Mine are for a machine that is still in bits.

Read this Fenner Drives technical guide on how to use them:

https://www.fptgroup.com/dss/docs/689_06_Fenner_Shaft_Fixings.pdf

Edited for better info

Edited By Ian Austin on 08/08/2018 12:10:31

That Fenner thing was interesting, I din't know you could get Taperlock hubs, wonder if I could convert one of them to a grinding wheel holder? I might even be able to balance the blooming thing...

Can you not use a separate taperlock bush and pulley, if you look at this one it puts the V groove on the screw side unlike that one in your opening post and under £10 the pair

That's the self same advertisement that caught me out...

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