Cleveland
Cleveland C91723 counterbore 7.250 in L 0.500 in dia
A high-speed steel counterbore with built-in pilot, 7.250 in long and .500 in diameter
- Precise 1/2 in counterbore diameter for accurate hole sizing
- 250 in overall length provides extended reach in deep workpieces
- High-speed steel construction resists wear during repetitive drilling tasks
- Built-in pilot ensures self-centering alignment without separate guide tools
- Bright finish reduces friction and improves chip evacuation in metal cutting
Cleveland C91723 counterbore overview
The Cleveland C91723 counterbore is a high-speed steel cutting tool with a built-in pilot for accurate hole alignment. It measures 7.250 in overall length and .500 in diameter. Designed for fractional-inch work, it suits machinists and maintenance technicians who need reliable counterboring in metal.
Installation and common issues
The tool fits standard drill chucks and collets that accept a .500 in shank. Secure it firmly and run at speeds recommended for high-speed steel to avoid chatter. Common problems include premature wear if coolant is omitted, and pilot damage when the workpiece is not clamped rigidly.
Pre-order checks
Verify that your machine spindle or drill press can hold a .500 in shank and deliver appropriate RPM for high-speed steel. Confirm the workpiece material is compatible with uncoated HSS cutting edges. Ensure adequate clearance for the 7.250 in overall length in your setup.
Highlights
- Precise 1/2 in counterbore diameter for accurate hole sizing
- 250 in overall length provides extended reach in deep workpieces
- High-speed steel construction resists wear during repetitive drilling tasks
- Built-in pilot ensures self-centering alignment without separate guide tools
- Bright finish reduces friction and improves chip evacuation in metal cutting
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
How can I confirm the counterbore is cutting cleanly after I mount it in the drill press?
After securing the 7.250 in tool in the chuck, run a test hole in scrap material; the 0.500 in high-speed steel pilot should guide the cutter without wobble and leave a flat-bottomed bore with no chatter marks.
What comes in the package and do I need any extra pilots or arbors?
The box contains the Cleveland C91723 counterbore with its built-in 0.500 in pilot; no separate pilot or arbor is required for standard fractional-inch drilling.
Which version of the C91723 should I choose for a half-inch clearance hole?
The C91723 is a single specification — 7.250 in overall length and 0.500 in diameter — so the only choice is this model when you need that exact fractional size.
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