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Drill America 1-1/4 inch cobalt drill bit bronze finish reduced shank

Drill America

Drill America 1-1/4in Reduced Shank Cobalt Silver and Deming Drill Bit pneumatic accessory

SKU CH-3M89-ZNXWT

A 1.2500 inch cobalt drill bit with a reduced 1/2 inch shank for use in larger drill chucks

  • Product typeDrill Accessories
  • 1-1/4 inch capacity handles large holes
  • Cobalt steel resists heat during heavy drilling
  • Reduced 1/2 inch shank fits standard chucks
  • Bronze oxide finish adds corrosion protection

1-1/4 Inch Cobalt Silver and Deming Drill Bit

This cobalt steel drill bit features a 1/2 inch reduced shank that fits standard drill chucks while delivering a 1.2500 inch cutting diameter. Bronze oxide surface treatment on the flutes reduces friction and resists heat during heavy drilling tasks. It suits maintenance technicians and metalworkers who need a single large-diameter bit for occasional steel or iron work.

Limits of a reduced shank large-diameter bit

The 1/2 inch shank restricts torque transmission, so the bit is not suited for continuous high-load production drilling or very hard alloys that demand a full-diameter shank. Flute length of three inches and overall length of six inches limit the maximum hole depth in a single pass. Buyers needing deeper holes or higher rigidity should consider taper-shank or solid-shank alternatives.

How it compares

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

Price $72.99
Pricier than about 76% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Should I choose the 1.2500 inch drill bit for my application?

The 1.2500 inch decimal equivalent matches the 1-1/4 inch size, so select this bit when you need that exact hole diameter.

How does the 1.2500 inch size perform in a standard drill press?

The 1/2 inch reduced shank fits common drill press chucks, while the cobalt steel and bronze oxide coating handle the heat of drilling 1.2500 inch holes in tough metal.

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