Special Tap

Put A Cork In It!

special tap, standard tap, tap chamfer
Overcoming Torqueing and Stalling
Are your special taps creating too much torque, or stalling? Teeth chipping? Common machinist’s wisdom says, “when having difficulty tapping a drilled-hole, make the hole diameter larger”. This assumes that the tap, with less material to remove, will cut easier. It’s common sense at first glance, but other things need to be considered.

Tags: Special Tap, Standard Tap, tap chamfer

Industry Standard - A Moving Target!

Industry Standard - A Moving Target!

The intent of defining a list of tools as “Standard” is to provide uniformity in manufacture, integrity, and use. This “uniformity” allows for ease of service, and provides interchangeability of common parts for the user, and ultimately for the consumer. It is also meant to assure quality of function for which the thread is intended.


In the United States, there are three primary organizations that contribute to those definitions. The descriptions of the entities below are meant to be simple for the purpose of illustration to show basic scope of involvement.

Tags: Industry Standard Tap, Popular Special, Special Tap, Standard Tap

SPECIAL TAPS = Solutions at the Highest Level

SPECIAL TAPS = Solutions at the Highest Level

First Level Solution

Standard taps have features that satisfy most applications. They are “General-Purpose” taps for this reason. Dimensionally, they try to hit the sweet spot, and check most of the common boxes.  Shanks and squares are accommodated by standard tool holders. The lengths of the tool, and length of thread, are sufficient for most set-ups and part requirements for depth of thread. Pitch-diameters are safely above the Go Gage to produce the specified Class-of-Fit for finished thread, and still distant enough from the “No-Go” to avoid any risk of producing oversized thread. Easy, in a cookie-cutter world, but not always that simple.

Tags: application specific taps, High Performance, Special Tap, Standard Taps