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CLEVELAND Counterbore Set: 9 Pc - Built-in-Pilot Counterbore Sets
CLEVELANDBuilt-in-Pilot Counterbore Sets

CLEVELAND Counterbore Set: 9 Pc

The CLEVELAND Counterbore Set is a 9-piece, high-speed steel built-in-pilot counterbore set (MPN C91750). It is a standard counterbore type from the CLEVELAND brand.

SKU 3G-OTH-186167

Also listed as: C 91750 · C-91750

Brand
CLEVELAND
Item
Counterbore Set: 9 Pc
Category
Built-in-Pilot Counterbore Sets
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Technical Specifications

CLEVELAND
Manufacturer Part Number
C91750
Counterbore Type
Standard

Technical Documents

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CLEVELAND Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CLEVELAND Counterbore Set is a 9-piece, high-speed steel built-in-pilot counterbore set (MPN C91750). It is a standard counterbore type from the CLEVELAND brand.

Frequently Asked Questions

What is the CLEVELAND Counterbore Set used for?

The CLEVELAND Counterbore Set is used to enlarge the top portion of a pre-drilled hole to create a flat-bottomed recess for socket-head cap screws or bolts. It is commonly applied in metalworking, machining, and assembly operations where flush fastener seating is required.

What are the specifications of the CLEVELAND Counterbore Set?

The CLEVELAND Counterbore Set (MPN C91750) includes 9 pieces made from high-speed steel. It features a built-in-pilot design and is classified as a standard counterbore type. The set is manufactured by CLEVELAND and is suitable for general-purpose counterboring in ferrous and non-ferrous materials.

Where to buy the CLEVELAND Counterbore Set worldwide?

You can source the CLEVELAND Counterbore Set worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine CLEVELAND tooling to procurement teams globally.

How to select the correct CLEVELAND Counterbore Set for my application?

To select the correct CLEVELAND Counterbore Set, match the pilot diameter to your pre-drilled hole size and ensure the counterbore diameter accommodates your fastener head. The 9-piece set covers common sizes. For material compatibility, high-speed steel works for steel, aluminum, and brass. Consult your fastener specifications for proper fit.

Used in

Common applications for CLEVELAND
Aerospace manufacturing — CLEVELAND NAS-spec aircraft extension drills for drilling fastener holes in aluminum airframe panels.
Bridge construction — CLEVELAND Morse-taper shank bridge reamers for enlarging bolt holes in structural steel.
Automotive production — CLEVELAND chucking reamers for precision finishing of engine component bores.
General metalworking — CLEVELAND single-flute countersinks for deburring holes in mild steel parts.
Tool and die making — CLEVELAND interchangeable-pilot counterbores for creating recesses for socket head cap screws.
Maintenance repair — CLEVELAND cobalt aircraft extension drills for drilling hardened steel in equipment repairs.

CLEVELAND Products

3G Electric supplies CLEVELAND built-in-pilot counterbore sets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
CLEVELAND Pilot for Counterbores: 13/16 in Head Dia, 3/8 in Pilot Hole Dia, 2 11/16 in Overall Lg (MPN C46679)
CLEVELAND
CLEVELAND Pilot for Counterbores: 13/16 in Head Dia, 3/8 in Pilot Hole Dia, 2 11/16 in Overall Lg (MPN C46679)
CLEVELAND Pilot for Counterbores: 13/16 in Head Dia, 5/16 in Pilot Hole Dia, 2 13/32 in Overall Lg (MPN C46678)
CLEVELAND
CLEVELAND Pilot for Counterbores: 13/16 in Head Dia, 5/16 in Pilot Hole Dia, 2 13/32 in Overall Lg (MPN C46678)
CLEVELAND Counterbore For Interchangeable Pilot: 13/32 in Bore Dia, High Speed Steel (MPN C46428)
CLEVELAND
CLEVELAND Counterbore For Interchangeable Pilot: 13/32 in Bore Dia, High Speed Steel (MPN C46428)
CLEVELAND Pilot for Counterbores: 25/32 in Head Dia, 5/16 in Pilot Hole Dia, 2 13/32 in Overall Lg (MPN C46673)
CLEVELAND
CLEVELAND Pilot for Counterbores: 25/32 in Head Dia, 5/16 in Pilot Hole Dia, 2 13/32 in Overall Lg (MPN C46673)
CLEVELAND Pilot for Counterbores: 7/8 in Head Dia, 1/4 in Pilot Hole Dia, 2 3/16 in Overall Lg (MPN C46687)
CLEVELAND
CLEVELAND Pilot for Counterbores: 7/8 in Head Dia, 1/4 in Pilot Hole Dia, 2 3/16 in Overall Lg (MPN C46687)
CLEVELAND Pilot for Counterbores: 25/32 in Head Dia, 3/8 in Pilot Hole Dia, 2 11/16 in Overall Lg (MPN C46674)
CLEVELAND
CLEVELAND Pilot for Counterbores: 25/32 in Head Dia, 3/8 in Pilot Hole Dia, 2 11/16 in Overall Lg (MPN C46674)

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CLEVELAND Counterbore Set: 8 Pc, High Speed Steel (MPN C91770)
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