Straight shank expansion reamers mount to the chuck of a drill press or similar machining tool. Use them to enlarge or finish an existing hole to a precise tolerance or size. An adjustment screw on the reamer expands the size of the cutting head so it can be reground to its original size, which extends the life of the reamer by allowing the operator to compensate for wear on the reamer's cutting edge.

Expansion reamers have an adjustment screw that expands the size of the cutting head so it can be reground to its original size. This extends the life of the tool by allowing the operator to compensate for wear on the reamer's cutting edge. These chucking reamers (sometimes called machine reamers) are installed in the chuck of a drill press, lathe, or similar machining tool to enlarge or finish an existing hole to a precise tolerance or size. They are made from high-speed steel and provide good wear resistance in purpose reaming applications.
Specification:
Item : Expansion Reamer
Measurement System : Fractional Inch
Reamer Size : 13/32"
Decimal Equivalent : 0.4062
Shank Type - Machining : Straight
Shank Dia. : 5/16"
Number of Flutes : 6
Flute Type : Straight
Flute Length : 3/4"
Material - Machining : High Speed Steel
Finish - Machining : Bright (Uncoated)
Cutting Direction - Machining : Right Hand
Overall Length : 7"
Coolant Fed : Non-Coolant Through
Mode of Operation : Machine
Size - Decimal : 13/32" - 0.4062"