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Small gold twist drill bit with double margin flutes, 3.90 mm diameter

M.A. Ford

M.A. Ford CXDSS 0390AP Cyclone Xd 3X Double Margin Drill 3.90mm

SKU CH-N4SJ-20XZ5

A 3.90 mm solid carbide drill with double margins for accurate holes in tough materials

  • 3X drilling depth reaches 3.90mm holes faster
  • Double margin design keeps 3.90mm bores straight
  • Cyclone Xd geometry cuts heat at 3.90mm
  • Solid carbide construction lasts through 3.90mm runs
  • Prop 65 warning lists chemical risk for 3.90mm tool

3.90 mm Solid Double Margin Drill

The M.A. Ford CXDSS 0390AP Cyclone Xd 3X is a 3.90 mm diameter drill with a solid double margin design. It is intended for machinists and maintenance teams who need accurate hole placement in production or repair work. The 3X length provides extended reach for deeper drilling operations. This accessory fits standard drill chucks and collet systems.

California Proposition 65 Compliance Notice

The product carries a California Proposition 65 warning for exposure to chemicals known to cause cancer and birth defects or other reproductive harm. This regulatory label does not alter the drill’s cutting geometry or material composition. Users should follow standard workshop safety practices and consult the safety data sheet for handling guidance. No additional accessories or software are bundled with this item.

Verify Chuck Capacity and Workpiece Requirements

Confirm that your drill press or hand drill accepts a 3.90 mm shank before ordering. Check that the 3X overall length suits your workpiece thickness and machine clearance. Ensure the solid double margin profile matches the tolerance and finish requirements for your specific application. This drill is not suited for buyers needing a different diameter, a stepped design, or a coolant-through feature.

How it compares

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

Price $63.99
Pricier than about 73% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

When should the 3.90 mm Cyclone Xd drill be replaced?

Replace the drill when the cutting edges show visible wear or when hole quality drops below tolerance.

What limits continuous drilling with the 3.90 mm Cyclone Xd?

Chip evacuation in deep holes becomes the limiting factor as flute loading increases with each pass.

How much heat builds up in the 3.90 mm Cyclone Xd during all-day drilling?

The solid-carbide body conducts heat into the workpiece and coolant, so the tool itself stays near spindle temperature.

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