5/32” -3-1/4” in diameter Tolerance

Positioning +/- 0.005”

Repeatability +/- 0.002”


A countersink is a conical hole cut into a plate. It allows the head of a countersunk bolt, when placed in the hole, to sit flush with or below the surface of the surrounding material. A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges.


A counterbore is a flat-bottomed hole that enlarges an existing hole. It is typically used when a fastener is to be used on a workpiece, the head of which must be either flush with or below the surface of the workpiece.


Reaming is a process that enlarges a pre-existing hole, usually drilled, utilizing a special reaming tool. This ensures a closer tolerance hole than can be achieved by drilling alone.


Tapping is a process that forms threads in a drilled or reamed hole, usually for screws or bolts.

1/4” – 1-1/4”


Milling is a process that can be used to machine slots or complex shapes. Machining the surface of plate to create a flat surface. Machining the edges of plate.
Interpolating a burned hole to a tighter tolerance.

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