We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver steel pilot bit with smooth shank and pointed tip

Drill America

Drill America DEWPIL9/16X1/4 9/16" X 1/4" Pilots for Counterbore pneumatic accessory

SKU CH-KS29-2QSJB

Interchangeable pilot for counterbore tools, enabling flexible spot-facing and deep counterboring operations

  • Interchangeable pilot design enables flexible counterboring setups
  • Two-piece construction provides integral shank and cutter stability
  • Suitable for spot-facing shallow holes up to 1/8" depth
  • Designed for counterboring previously formed holes
  • California Proposition 65 chemical warning applies to this product

9/16" Counterbore Pilot Set

These pilots fit 9/16 inch counterbore cutters with a 1/4 inch shank. They are designed for machinists and maintenance technicians who need to enlarge existing holes for bolt heads or nuts. The two-piece construction allows the pilot to be swapped without replacing the entire tool.

Interchangeable Pilot Design

The pilot separates from the cutter body so one cutter can serve multiple hole diameters. This reduces tool inventory and change-over time when a job requires several counterbore sizes. The supplier notes that the interchangeable pilot provides flexibility in the use of the tool.

Shallow Spot-Facing And Deep Counterboring

The accessory handles both spot-facing depths of 1/8 inch or less and deeper counterboring operations. It is not suited for holes smaller than the pilot diameter or for materials that require specialised coating not mentioned in the data. California Proposition 65 warnings apply to this product.

How it compares

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

Price $6.99
Cheaper than about 92% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDRILL AMERICA

Questions about this item

Will the interchangeable pilot need replacement after heavy counterboring use?

The pilot is designed as a replaceable component in the two-piece counterbore system, allowing it to be swapped when wear affects hole alignment or cut quality.

What limits continuous use of the 9/16 inch counterbore with this pilot?

Heat buildup in the cutter and pilot interface during prolonged cutting cycles is the primary limit, requiring cooling pauses to maintain dimensional accuracy.

How much heat does the pilot generate during all-day counterboring operations?

The pilot conducts cutting heat from the workpiece; extended runs will raise its temperature enough to require periodic rest intervals for operator safety and tool life.

More in Bits, Hole Saws & Accessory Kits

Similar items