OKAZAKI Hand Reamer HR0790 Size 7.9 mm

The OKAZAKI HR Series (Hand Reamer) model HR0790 is a premium quality hand reamer. Made from High Speed Steel (HSS), it is designed for final hole finishing to achieve much higher precision than conventional drilling. It helps produce perfectly round holes with a smooth surface finish, ideal for engineering tasks requiring decimal-level accuracy.

High Speed Steel (HSS): Made from premium Japanese high speed steel, offering high strength, wear resistance, and long-lasting edge retention.

Long Taper Lead: Features an extra-long tapered end to assist with self-centering when starting the hand reaming process, making it easy to align the reamer perpendicularly with the hole.

Square End Shank: The shank end is squared to provide a secure grip with a tap wrench or reamer handle, preventing slipping during use.

Straight Flute Design: Straight cutting flutes help remove small amounts of metal chips finely and precisely.

Used for precision reaming of 7.9 mm holes to achieve exact required tolerances.

Ideal for maintenance work, machine assembly, or preparing pin holes.

Suitable for multi-material applications such as mild steel, cast iron, aluminum, copper, and other alloys.

Recommendation: Always turn clockwise in one direction only (never rotate counterclockwise, even when withdrawing the reamer from the workpiece) and use cutting lubricant for the best surface finish.

Model Code: HR0790

Diameter: 7.9 mm.

Material: High Speed Steel (HSS)

Shank Type: Hand Reamer Shank (Straight shank with square end)

Flute type: Straight Flute

Country of origin: Japan