Careers
✉ Stay In Touch
© 2022 Terms & Conditions of Use | Conditions of Sale | Data Privacy Policy
Kennametal Inc. 525 William Penn Place Suite 3300, Pittsburgh, PA 15219
New customer
Are you new to Kennametal? Create an account and get started.
Create AccountRegistered User
already have an account? Sign in.
Sign InShip-to
Change Account
New customer
Are you new to Kennametal? Create an account and get started.
Create AccountRegistered User
already have an account? Sign in.
Sign InShip-to
Change Account
successfully added to cart
View Cart
View Cart
Notifications
Mark all as readKennametal® Tap Drill Size Calculator
These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.
Suggested Percentages of Full Thread in Tapped Holes
A common internal thread, drilled so that it results in 50% of full thread will break the external thread, before the internal thread will strip. A common internal thread drilled out so that it contains 100% of full thread is only 5% stronger than a 75% height of thread, yet it requires 3 times the power to tap.
