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Cylindrical 8.40 mm double margin drill bit with fluted silver finish

M.A. Ford

M.A. Ford CXDSR 0840AP Cyclone Xd 5X Double Margin Drill 8.40 mm

SKU CH-ZD4Z-9818R

A solid double-margin drill bit for 8.40 mm holes with five-times diameter reach

  • 40 mm diameter drills precise holes in one pass
  • 5X Cyclone Xd geometry cuts faster with less thrust
  • Double margin design keeps the drill straight and round
  • Solid carbide construction resists wear for longer tool life
  • Brand-new M.A. Ford quality ensures consistent performance

8.40 mm Cyclone Xd drill

The M.A. Ford CXDSR 0840AP is a solid carbide drill with a 5× diameter flute length and double-margin geometry. It targets machine shops and maintenance teams that need accurate holes in steel, stainless steel and cast iron. The 8.40 mm cutting diameter suits metric tap-drill charts and reaming allowances.

Shank fit and coolant

The cylindrical shank fits standard ER collets, Weldon holders and hydraulic chucks without adapters. Double margins guide the drill straight but reduce chip space, so peck cycles are recommended in deep holes. Flood coolant or through-spindle delivery prevents margin overheating and premature wear.

Steady cutting under load

At full 5× depth the drill maintains diameter tolerance and surface finish when feed and speed follow carbide parameters. Continuous engagement generates heat that the double margins dissipate into the workpiece rather than the tool body. Interrupted cuts or cross-holes can chip the margins if the feed is not reduced.

How it compares

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

Price $182.99
Pricier than about 90% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

How can I confirm the 8.40 mm Cyclone Xd drill is cutting correctly after clamping it in the chuck?

The drill should produce a straight, round hole at the 8.40 mm diameter with consistent chip evacuation and no chatter when run at the recommended speed for the workpiece material.

What does the box contain for the CXDSR 0840AP and what extra items are needed to use it?

The package includes the 8.40 mm solid carbide double-margin drill itself; you must supply a compatible tool holder or drill chuck, cutting fluid or coolant, and the workpiece fixturing.

Which Cyclone Xd 5X version should I choose for an 8.40 mm hole?

Select the CXDSR 0840AP — its 8.40 mm diameter matches the hole size you need to drill.

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