Allied Machine & Engineering 021216-4 Drill Insert Special Holder

Allied Machine & Engineering 021216-4 Drill Insert Special Holder is a purpose-built tool component that secures a drill insert in a dedicated holder to enable precise drilling operations. The part number 021216-4 identifies this holder in Allied's catalog, and the listing notes a 0.350 dimension associated with the item. This type of holder is typically used in machine shops and workshops where interchangeable drill inserts must be positioned reliably to maintain hole geometry and repeatable performance. As a specialty holder, it supports applications that require quick changeover and stable seating of the insert, reducing runout and improving process consistency when used with compatible drill inserts. Machinists select such holders to match insert geometry and the machine's spindle interface, then secure the assembly to maintain alignment throughout cutting operations. The 021216-4 designation anchors the component within Allied's tooling ecosystem, offering a standardized solution for holding drill inserts in a compact, focused holder.