Cutting Motor Shaft

[Drag Boat Bob]

What is the best way to cut a flat spot on a motor shaft (for coupler set screw)?

I was going to use my dremel, but thought that there may be a better way.

Thanks in advance...

[Chilli]

I always use the dremel. I've used the sanding drum and the chain saw sharpening stone. Both work great.

[m4a1usr]

I use a dremel too. Doesnt take but a couple passes with a steady hand to cut a flat. All you effectively need is the diameter of the set screw.


John

[illz302]

Same here just be carefull not to slip or it will most likely cause your setscrew to be able to slide back and forth on the shaft...........

Gotta be able to learn from your own mistakes.

[Rex R]

tape(or otherwise cover) any holes in the motor can to keep metal filings out of the motor.

[Rumdog]

Make sure that if your motors end caps are open/ have foles in them to put some tape or something over the openings. You dont want tiny metal shavings goin in the motor!

[Rumdog]

lol, too slow I was!

[Steven Vaccaro]

Someone once said to stick the motor in a zip-lock bag and poke the shaft through it. I use this method now and its great.

[Drag Boat Bob]

Someone once said to stick the motor in a zip-lock bag and poke the shaft through it. I use this method now and its great.

What a great idea! Going to give this a try.

Thanks again to everyone...

[FloatDaBoat]

Here’s a jig I fabricated from quarter inch poplar, an old screen door hinge, & some 2 inch Velcro. It’s original purpose was for cutting stainless tubing, but I’ve used it to grind set screw flats on prop shafts. With slight modification, It’d work great for motor shafts as well. To achieve a wider notch, just epoxy two cutting wheels together (two 1/16 inch thick wheels = 1/8 inch - - should be fine for a motor shaft).

[Drag Boat Bob]

Here’s a jig I fabricated from quarter inch poplar, an old screen door hinge, & some 2 inch Velcro. It’s original purpose was for cutting stainless tubing, but I’ve used it to grind set screw flats on prop shafts. With slight modification, It’d work great for motor shafts as well. To achieve a wider notch, just epoxy two cutting wheels together (two 1/16 inch thick wheels = 1/8 inch - - should be fine for a motor shaft).

Now that's ingenuity...

[Fluid]

To achieve a wider notch, just epoxy two cutting wheels together (two 1/16 inch thick wheels = 1/8 inch - - should be fine for a motor shaft).

Won't be fine for a motor shaft. You will get a notch with a raised portion in the middle which will have to be ground down separately for the set screw to seat adequately. Ask me how I know....


.

[FloatDaBoat]

Won't be fine for a motor shaft. You will get a notch with a raised portion in the middle which will have to be ground down separately for the set screw to seat adequately. Ask me how I know....


.

If the two wheels are Tightly Clamped Together while the epoxy cures, there will be no ridge in the middle - - ask me how I know . . . .