Need a couple of new cutting wheels

[Ernie Vitucci]

Good Morning...I am looking for new little cutting wheels about 1/2 inch diameter and about 20 thousands thick to clean up the armatures of Generators and Starters. The couple that we have had for years are about shot. No name on them...and so far, after lots of looking I'm stumped! Hope someone on the barn has the answer. Contact me here or text me at [email protected]. Thanks very much...Ernie in Arizona

[Benson]

Ernie,

Dremel makes some that are .020 thick but are 0.900 Catalog #409. They come in a plastic "bottle" 36 to a bottle.

These do fracture quite easily though.

If I remember Harbor Fright Has some no name ones too.

I use them to reduce the number of coils on Heli-coils when only wrong size is available.

Might not work on armatures.

Years ago Bill Kenz told me that starter armatures should NOT be under cut. Only Generators.

Is that still true?

[ndnchf]

I use blades like those shown here:

https://martindaleco.com/wp-content/...dercutters.pdf

[Ernie Vitucci]

Thanks, Guys...I appreciate the help. Ernie in Arizona

[JayJay]

Back when I was a wee one I was taught to use hacksaw blades, filed flat (no kerf), to hog out commutators.

JayJay

[Synchro909]

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Originally Posted by Benson

Ernie,

Dremel makes some that are .020 thick but are 0.900 Catalog #409. They come in a plastic "bottle" 36 to a bottle.

These do fracture quite easily though if tool is dropped.

If I remember Harbor Fright Has some no name ones too.

I use them to reduce the number of coils on Heli-coils when only wrong size is available.

Might not work on armatures.

Years ago Bill Kenz told me that starter armatures should NOT be under cut. Only Generators.

Is that still true?

I hold that to be true. I NEVER undercut the armature on a starter motor.

[stevests]

I also only undercut generator armatures - starters don't spin fast enough to catch the carbon dust.

[Kurt in NJ]

Undercutting a starter depends on the type of brush, compacted copper brushes— no undercutting, soft carbon brushes ( mostly going on old european starters many times are undercut)
Try — martindaleco.com —- years ago i got cutters from them for the Hillhorst undercutting machine i have.

[rotorwrench]

Kerf width is important on each different type of commutator. The pull type hand saws are available that can cut different kerf widths depending on the need. Regular hack saws have a pretty wide kerf due to the offsets in the teeth. The Japanese make some really good pull saw blades. I just do it by hand.

[JayJay]

X-acto had some thin blade, fine tooth saws that I've used since I was a kid for cutting plastics. There are clones currently available on Amazon.

JayJay

[ndnchf]

For the benefit of those who may read this thread in the future, but are not quite sure what is being discussed - here is a photo of mine.

[Dan McEachern]

google is your friend:

https://www.eis-inc.com/catalog/hand...5-ad3c00164174

[Benson]

Originally Posted by Kurt in NJ

Undercutting a starter depends on the type of brush, compacted copper brushes— no undercutting, soft carbon brushes ( mostly going on old european starters many times are undercut)
Try — martindaleco.com —- years ago i got cutters from them for the Hillhorst undercutting machine i have.

Thanks for this information. That makes sense, the starters (Ford and GM) that I remember working on have the compacted copper brushes.