MetalworkingFun Forum

Ive never used a broach Pete, but I'd be leery like you going that depth with one.

Good to see the shop starting to take shape again Mike.

Forgot to post this yesterday after pulling the motor apart on my horizontal bandsaw.  The bearings are shot and this is the reason for the strip down.  However, the state of the windings is somewhat concerning.  

[attachment=12225]

I'm not sure why the aluminium (I'm guessing its aluminium) bits poking out of the top of the stator look like they do?

[attachment=12226]

At this stage, given the cost of bearings, I am going to put in some new ones and slap it together and run it until the magic smoke escapes or however it wishes to take itself out of this world.  

Then I'll chase down a replacement...

(11-16-2015, 06:41 AM)Mayhem Wrote: [ -> ]I'm not sure why the aluminium (I'm guessing its aluminium) bits poking out of the top of the stator look like they do?

Looks (to me) like someone had used those fan blades as a press/pry point at some time, most likely when the bearings were last changed. I would venture a guess that is also the reason the winding's started to cook off and burn up the insulation. Bearings are cheap enough, but I would watch that motor like a hawk if I were you if/when it runs again. I'm doubtful that it will run for long if it does run.    



p.s.
I just noticed in your first picture that the blades at the rear of the rotor (near the centrifugal start switch) appear to be smashed totally flat!

still messing around with this project, don't know if it will be done by the new year of not.

[attachment=12228]

I'd recommend searching for an industrial electric motor repair shop -- they can perform a "dip" on the motor and extend it's life. Basically, it renews the lacquer insulation.

Pete, the enclosure has a fan in the top, blowing outward. The whole bottom is closed off with an air filter for a '93 Taurus. I had one on hand and built the box to fit. On Saturday, I went and bought a new one. All this is to keep metal dust from being drawn into the electronics.

(11-15-2015, 10:58 PM)Pete O Wrote: [ -> ]I actually have a set of keyway broaches from a clearing sale a few years ago, have never used them. This keyway though is about 3 times longer than any of the spigots in the broach set, I figured that would result in a broken broach as it comes out the end of the spigot. Correct me if I'm wrong- before I start the second bush!

Good call Pete.

Quote:The Maximum Length of Cut with Push-Type Keyway Broaches should not exceed the length of the Bushing being used.

(11-17-2015, 09:48 AM)Highpower Wrote: [ -> ]

(11-15-2015, 10:58 PM)Pete O Wrote: [ -> ]I actually have a set of keyway broaches from a clearing sale a few years ago, have never used them. This keyway though is about 3 times longer than any of the spigots in the broach set, I figured that would result in a broken broach as it comes out the end of the spigot. Correct me if I'm wrong- before I start the second bush!

Good call Pete.  

Quote:The Maximum Length of Cut with Push-Type Keyway Broaches should not exceed the length of the Bushing being used.

That's a great website, lots of good info about broaching and slotting.
One of the reasons I've never used the broaches I have, is that I don't have a press. Just another thing on the project list.

Saw this in a machining video, can't remember who's to give credit. He was using it with a pin to rotate a part on while rounding the end with an end mill. He could bolt stops to keep the cutter from digging into the side, worked slick and think it will have lots of other uses. 
At the moment were's all tapped out though. Made from a piece of scrap from a plant that makes helicopter parts, don't know the alloy but sure nice to work with.