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Unidentifiable tool

joepaintin

New member
Joined
Jul 11, 2026
Messages
2
What is this for?
One-piece hardened steel tools with integral solid pilots (1/4”, etc.), large side relief window, conical and cylindrical pilot versions, no removable parts


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joepaintin

New member
Joined
Jul 11, 2026
Messages
2
The ones with the conical tip are Weldon 82deg per the stamp on the shank. The ones with the cylindrical tip don’t have a stamp marking is it a different manufacturer and different use? Who made them?
 

JuncleJohn

Well-known member
Joined
Dec 27, 2025
Messages
274
Location
Omaha, Nebraska
Yep, I concur. Countersinks or chamfer tools, depending on your own terminology. Most would call them countersinks, a machinist or toolmaker would most likely call them chamfer tools.

Typically the 82 degree would be for an inch flat head screw and 90 would for a metric.

John
 
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cvairwerks

Well-known member
Joined
Aug 12, 2016
Messages
7,249
Location
Within hearing distance of Texas Motor Speedway
As PC and OMR said, countersinks. There are two distinct types...the ones with no extension are simply know as "chatterless" zero flute c'sinks and the others are piloted zero flute c'sinks.

Those don't look to be in very good shape. I wouldn't use them if the c'sink was critical.
 
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