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Black carbon steel chuck key with 11-tooth gear and 3mm pilot

Unique-Bargains

Unique-Bargains Chuck Key 3mm Pilot 11 Teeth 11.2mm Gear Black

SKU CH-EN7Y-S032G

Carbon-steel chuck key with a 3 mm pilot, 11 teeth and 11.2 mm gear diameter for 0.3-4 mm drill chucks

  • 3 mm pilot fits 0.3–4 mm chucks
  • 11-tooth gear delivers strong grip on drill bits
  • Carbon-steel body resists wear during heavy use
  • Blackened coating protects against corrosion
  • Compact 57 × 35 mm size stores easily

Replacement Chuck Key for 3 mm Pilot Drills

This Unique-Bargains chuck key fits drill chucks that use a 3 mm pilot and an 11-tooth gear measuring 11.2 mm in diameter. It is supplied new and ready for immediate use in a workshop or on site. The key replaces lost or worn originals so the drill can be returned to service quickly.

Carbon Steel Body with Blackened Finish

The key is machined from solid carbon steel and coated with a durable blackening treatment that resists corrosion. Its compact 57 mm by 35 mm outline provides a firm grip while remaining easy to store in a tool pouch. The 11-teeth gear engages the chuck securely for reliable tightening and loosening of the jaws.

Manual Operation with No Power Draw

Because the key is purely mechanical it generates no heat, produces no noise and requires no electricity or compressed air. Normal use consists of inserting the 3 mm pilot, engaging the 11.2 mm gear and applying hand torque to clamp or release drill bits. The carbon steel construction withstands repeated high-torque cycles without deformation.

How it compares

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

Price $4.99
Cheaper than about 95% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

What chuck pilot size does the 3 mm pilot on this key fit?

The 3 mm pilot matches chucks with a 3 mm pilot hole, which is the standard size for 0.3–4 mm drill chucks.

What are the overall dimensions of the key so I can check clearance in my tool bag?

The key measures 57 mm long by 35 mm wide, or 2.24 inches by 1.38 inches.

How do I install the key and what is the common mistake to avoid?

Insert the 3 mm pilot fully into the chuck centre hole, engage the 11 teeth with the gear ring, then turn; the frequent error is not seating the pilot completely before applying torque.

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