Allied Machine T-A

Product system overview

T-A is Allied Machine's long-running general-purpose replaceable spade-insert drilling system. It combines reusable coolant-through holders with self-centering inserts and a broad geometry catalog intended to cover common steels, cast irons, high-temperature alloys, aluminum alloys, structural work, thin-wall parts, flat-bottom holes, and other specialized applications.

Industries and applications

• General-purpose production drilling where reusable holders and replaceable cutting edges are preferred.
• Applications that require a specialized T-A insert geometry rather than a single universal point design.
• Existing T-A installations where holder series, insert series, diameter, geometry, substrate, and coating must remain compatible.

Technical and quote details

• Architecture: replaceable spade-style insert retained in a reusable coolant-through drill holder.
• Cutting design: self-centering point, web-thin geometry, corner clips, and geometry-dependent chip control.
• Holder choices include straight or helical flute bodies, multiple shank styles, and depth ranges that vary by series.
• The T-A geometry catalog includes more than 20 geometry and coating combinations for material and hole-condition requirements.
• Current dimensional range, depth ratio, insert substrate, coating, and holder compatibility must be confirmed from the selected catalog series.

Selection notes

Use T-A when broad application coverage, existing holder ownership, and economical insert replacement outweigh the need for a newer material-specific high-performance platform.

Record the complete holder and insert identifiers, geometry, coating, diameter, depth, coolant, and starting cutting data.

Variables to validate

• T-A is a platform with several holder and insert series; the family name alone is not enough to establish compatibility.
• Special point geometries solve different problems and should not be substituted without checking material, entry, exit, wall condition, and hole form.
• Deep-hole use depends on coolant delivery, chip evacuation, pilot strategy, holder condition, and Allied's current operating guidance.

Official product references

• Allied T-A official product page
• Allied T-A geometry directory