Removing a rusted on motor sheave

[precisionworks]

I tried the normal methods & got nowhere. The shaft would certainly press out but the motor housing was too large to fit my arbor press. So I removed the shaft & sheave using PlanB :nana:

The motor was already scrap but the sheave is needed for my bandsaw VFD conversion, details to follow in another thread.

https://youtu.be/T4Ru_GHyKyE

 

[DrafterDan]

All I can say is that it's good to have options.
Options come from experience which gives us time to think, as opposed to say hitting it really hard with a hammer several times.

 

[gadget_lover]

Yep... the more toys that you have, the more options you have.

I would not have thought to use the bandsaw. Thanks for that. I would have thought to use...

a) The 10 ton porta power hydraulic jack with the duckbill

b) A gear puller

c) a bit of heat and Kroil

d) A 20T press


Ten years ago, my only choice would have been...

e) A BFH and some wedges.

 

[Poppy]

Watching your video, I noticed an allen set screw, that I would have pulled and put some penetrating oil into it. I'm curious, did you miss that, and is that what kept your other methods from failing?

A fire wrench, gear puller and BFH should have worked.

But yeah... more experience, more tools, more options. :thumbsup:
I gave away my band saw, but a angle grinder, or sawzall would have made short work of that too.

 

[precisionworks]

Watching your video, I noticed an allen set screw, that I would have pulled and put some penetrating oil into it. I'm curious, did you miss that,

Actually there are two set screws, one for the inner sheave face & another for the outer face as this is an adjustable pitch unit.

A fire wrench, gear puller and BFH should have worked.

I needed to remove the sheave in an undamaged state for reuse.

an angle grinder, or sawzall would have made short work of that too.

The cutoff disc on my 4.5" angle grinder isn't large enough to reach the shaft. None of my friends own a Sawzall ...

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My largest gear puller is a great option for pulling (drum roll please) ... gears. Gears are generally thicker & more difficult to break while sheaves, especially two piece adjustable cast iron sheaves, are thinner & more fragile. Concentrating thousands of pounds of force on three pressure points in an invitation to disaster IMHO.

Which leaves pressing as the safest choice. The sheave has nearly 100% support which distributes pressure over the largest available area resulting in the smallest pressure per square unit.

I learned all that on YouTube

 

[precisionworks]

Before & after ... after 6000# of pressure plus wire brushing.