Drill and Chamfer Holders

The T-A Pro drill and chamfer body provides a large range of diameters that can be drilled and chamfered with a single tool, ensuring flexibility and performance with a single drill body.
Sept. 17, 2025
2 min read
Allied Machine and Engineering
Allied Machine and Engineering T-A Pro Drill and Chamfer Holder
The new holders are recommended for automotive, heavy equipment, and mold/die industries where threaded holes are numerous and reducing cycle times is critical.

ALLIED MACHINE and ENGINEERING, a manufacturer of holemaking and finishing cutting tools, expanded its T-A Pro product line with new drill and chamfer holders. It explained this product extension gives users the ability to drill and chamfer a hole in a single operation, eliminating the need for secondary operations like chamfering and/or deburring as well as the need for a tool change.

The new holders are recommended for automotive, heavy equipment, and mold/die industries where threaded holes are numerous and reducing cycle times is critical. They are compatible with all existing T-A Pro inserts and are available in Y-3 series and sub series A and C.

The T-A Pro drill and chamfer holders also offer the following functions:

  • Provide a 0.040 inch (1.0 millimeter) x 45 degree (minimum) chamfer for various thread specifications, including: UN | ISO | NPT | NPS | BSPP | BSPT | BSW.
  • Chamfer/edge break the top of the hole to reduce secondary deburring.
  • Pre-drill for extended length holders from 10xD to 15xD due to the flute length of the tool being at a minimum 2xD.

Compared to alternative products, the T-A Pro drill and chamfer body provides a large range of diameters that can be drilled and chamfered with a single tool—delivering more flexibility out of a single drill body without sacrificing performance. Targeted around thread sizes, this product offers an easy selection guide for users when choosing the correct drill body and insert combination for the job. However, if the length and diameter specifications do not meet the customer’s requirements, customized solutions tailored specifically to the application are available.

“We’ve taken the specialized performance our customers count on and transformed it into a standard solution—designed to simplify setups, cut cycle times, and drive higher throughput,” according to John Weniger, product manager.

Learn more at go.alliedmachine.com/TAP_Drill-Chamfer.