Help..Custom tool source: 10mm spot face with .159 drill

matthewlee · Feb 26, 2020

Hi PM

Im looking for a tool that would allow me to tap drill 10-32 (.159") and also create a .4 or 10mm spot face.

The hole is going radially in a diameter and Im trying to run it in a live tooling lathe. I dont have enough live holders to do all the operations I need and this tool would make it doable.

Should I be looking at a custom tooling place or has someone seen a spotface or counterbore that can be added to a drill bit?

Thanks
Matt

Limy Sami · Feb 26, 2020

I'd say custom grind - 1 piece tools are more reliable.

BUT ………………….

Can you not use an off the shelf 5/32 2 flute end mill to drill and interpolate the hole then do the spot face?

jims · Feb 26, 2020

Step drills unlimited
Downey Ca .
Google them.

matthewlee · Feb 26, 2020

I am using a C-axis machine. Interpolation is out.
Thanks

Limy Sami said:
I'd say custom grind - 1 piece tools are more reliable.

BUT ………………….

Can you not use an off the shelf 5/32 2 flute end mill to drill and interpolate the hole then do the spot face?

AD Design · Feb 27, 2020

I would think (but don't know for sure) that in the greater St. Louis area there should be a few companies willing to make step drills for your application. I worked for Spiral Step Tool (Chicago area) in the 1980's and that was a regular part of their standard product line. Somebody with a surface grinder and/or a T&C grinder could do this with a 13/32 stub drill (less flex) without too much trouble. I've made step drills/spot face now and then for similar applications. A good tool grinder hand could even include the c'sink on the same drill, eliminating the extra operation (although more expensive). It's all about quantity, cost, and savings. Hope this helped.

Booze Daily · Feb 27, 2020

How about a c'bore with interchangeable pilot?

https://www.mscdirect.com/product/details/65706368

1/8" pilot hole, spin down a screw machine length .159 drill?

TeachMePlease · Feb 27, 2020

MITGI.US

They'll make a sweet custom in a week or two. Great for repeat jobs.

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Help..Custom tool source: 10mm spot face with .159 drill

matthewlee

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Limy Sami

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jims

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matthewlee

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AD Design

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Booze Daily

Titanium

TeachMePlease

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