New Carbide Tool

[Alzey]

First of all, thanks to jjudge for his great info on building Carbide Tools.

Made from:

• 1/2 inch Cold Rolled Steel 12L14 Round Rod, ASTM A108 (7 inch)
• 8 inch mystery wood (Grab Bag Spindle pack from Woodcraft)
• 3/4 smooth copper to 3/4 thread coupler (turned off nut)
• 10-32 screws for both cutter head and shaft mounting
• IC-2515154-8R Cutter head from Global Tooling
• BLO Finish

Learned a few thing:

• You can't drill round metal correctly without clamps
• Use a 60 degree starter drill bit or regular drill bit will just dance around
• A 4 jaw chuck would have come in handy. Made this between centers then drilled on drill press
• Learned how to properly use taps from a co-worker who used to be a machinist at a chemical plant. He brought me 3 types of 10-32 taps to create a clean thread pattern.

Now I just have to figure out how to use it properly:embarrassed:


Thanks for looking. As always, hints/tips for improvement are always welcome.

 

[holmqer]

good job!

 

[reiddog1]

Looks great! I need to nut up and make myself one of these. I'm getting a little jealous of you guys and your custom carbide cutters .

 

[rherrell]

I see one thing that might give you a problem. The flat spot you milled for the insert is too big, the insert should be touching the shoulder so it won't turn on you. Other than that it's beautiful!:biggrin:

 

[Alzey]

I was wondering about that. i had a bit of a problem getting the blade tight and that was my first thought. Guess I will shorten the tip and re-drill the blade mount.

Thanks for the advice.

 

[Alzey]

Reground and tapped tool tip. Tip length is now 4in and handle is 8.25in.

Thanks for the advice and support from this great forum.

 

[mson]

Good for you !!

I have 1/2" key stock ready to go. Just waiting on the delivery of carbide cutters and matching screws from Global Tools..

I could make the handle while I'm waiting. Nice job on the copper coupler. Did you rivet the coupler with a copper rivet ?

Also, did you epoxy the bit mount into the handle ?

thanks

 

[Alzey]

*** Disclaimer: This is the first one of these I have made and only have about 5 minutes of lathe time playing with it ***

No glue, no epoxy. I turned the wood to be a shade bigger than inside diameter of the coupler. I then drove the wood into the coupler until I couldn't get it move any more. If notice, there is darker ring right at the base of the copper. That is where I could not get the coupler on as far as I made. So I filled the gap with savings and CA. I then put the back on between centers and turned off the nut shape (see picture for coupler). After everything was complete, I drilled a 1/2 hole in the wood to take the handle.

I use a drill press V block to clamp the 1/2 rod. Then slid the handle over the rod under the drill bit. I drilled a hole though the coupler, wood and 1/2 rod. I then drilled the coupler so the screw would slide though it and drilled a shallow counter sink. I then removed the 1/2 rod and taped it to 10-32.

Final assembly is held together with a 10-32 x 1inch screw.

The only thing I would have done different would have been to use a smaller drill bit than 1/2 inch to make the tool insert a tighter fit. But right now with the screw there is no movement in the tool. Time will tell if I need to rethink the handle.