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Silver high-speed steel taper-length twist drill bit with black oxide finish, 15/16 inch diameter, 6.125 inch flute, 118 degree point

Drill America

Drill America 15/16 In. HSS Taper Length Twist Drill Bit 6.125 in. Flute 118° Point

SKU CH-RZH2-0D7NR

High-speed steel taper-length bit drills 15/16 in. holes with a 6.125 in. flute and 118° point for deep drilling in wood, iron and steel

  • Product typeDrill Bits
  • Deeper drilling reach with 6.125 in. flute length
  • Faster starts and cleaner holes from 118° conventional point
  • Versatile material coverage across wood, iron and steel
  • Extended taper length for holes beyond standard jobber depth
  • Broad chuck compatibility via round shank design

Drill Bit for Deep-Hole Work

This 15/16 in. high-speed steel taper length twist drill bit is built for jobs that need reach beyond a standard jobber length. The 6.125 in. flute lets you drill deeper holes in wood, iron, steel and low-tensile-strength alloys without changing tools. Machinists, maintenance crews and fabricators who routinely bore through thick plate or deep stock will find the extra length practical. It is not suited for very hard materials or precision work that demands a split-point geometry.

Heat and Wear in Normal Use

High-speed steel construction with a black oxide finish adds surface lubricity and holds coolant near the 118° conventional point during extended cuts. The treatment reduces friction so the bit runs cooler and resists galling when drilling steel or iron at typical shop speeds. Round shank fits standard chucks and collets without slippage, keeping power transfer steady. No special cooling system or low-rpm mandate is required for general-purpose drilling.

Round Shank and Black Oxide Benefits

The round shank works with keyless chucks, collet sets and quick-change adapters already on the bench, so no new holders are needed. Black oxide coating creates microscopic pockets that retain cutting fluid, extending edge life in abrasive alloys and reducing the frequency of re-sharpening. These two features together lower per-hole cost for production and maintenance teams drilling repetitive deep holes.

How it compares

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

Price $42.99
Pricier than about 63% of the 5,493 comparable items (median $27.99).

Specifications

Product
Product typeDrill Bits

Questions about this item

How do I install the 15/16 in. round shank into a drill chuck without it slipping?

Open the chuck jaws wide, insert the round shank fully until it seats, then tighten each jaw evenly by hand before final tightening with the key to prevent off-centre grip.

When will the 118° point on this high speed steel bit need resharpening?

Resharpen when the cutting lips show visible rounding or when feed pressure increases noticeably; the black oxide surface treatment helps retain lubricity but does not eliminate normal wear.

At what depth does chip packing become a problem with the 6.125 in. flute length?

Chip evacuation deteriorates once the hole depth approaches the full 6.125 in. flute length; withdraw the bit frequently to clear swarf and allow coolant to reach the cutting edges.

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