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Cleveland C91700 counterbore tool, bright finish, 3.500 inch length, .313 inch diameter, size 10

Cleveland

Cleveland C91700 Counterbore #10 3.500" L .313" dia. Bright

SKU CH-F3Z5-FHX2D

A #10 wire-size counterbore with a built-in pilot, 3.500 inches long and .313 inch diameter, made from high-speed steel with a bright finish

  • #10 wire size matches standard fasteners
  • 313" pilot diameter guides clean counterbores
  • 500" overall length reaches deep holes
  • High-speed steel construction resists wear
  • Bright finish reduces friction during cutting

Cleveland C91700 Counterbore

The Cleveland C91700 is a high-speed steel counterbore with a built-in pilot designed for #10 wire size holes. It suits machinists and maintenance technicians who need to create precise flat-bottom recesses for socket head cap screws in metal workpieces.

Installation and common issues

The tool installs directly into a drill press or milling machine chuck using its standard shank. The integrated pilot guides the cutter into the pre-drilled clearance hole to ensure concentricity. Misalignment occurs if the pilot diameter does not match the existing hole or if the workpiece is not clamped rigidly.

Practical limits of the interface

The counterbore has a fixed cutting diameter of .313 inches and an overall length of 3.500 inches. These dimensions restrict its use to #10 screw sizes and limit the maximum depth of the counterbore recess. The high-speed steel construction requires appropriate cutting speeds and lubrication to prevent premature wear when machining harder alloys.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $109.99
Pricier than about 85% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

How do I confirm the Cleveland C91700 counterbore is cutting correctly after setup?

Verify the tool produces a clean, flat-bottomed recess with a .313" diameter that matches the #10 wire size and runs true without chatter.

What comes with the Cleveland C91700 counterbore and what must I supply?

The box contains the counterbore with its built-in pilot; you must provide a compatible drill chuck or holder and cutting fluid.

Which version of the Cleveland counterbore should I choose for a #10 wire clearance hole?

Select the C91700 model with 3.500" overall length and .313" diameter, as it is designated for #10 wire standard counterboring.

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