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Cle-Line 5/16 inch screw machine drill bit with black oxide finish and 135 degree split point

Cle-Line

Cle-Line C23476 Screw Machine Drill Bit 5/16 in 135 Degrees

SKU CH-K347-1NEM4

A 5/16 inch high-speed steel drill bit with a 135-degree split point and black oxide finish for general-purpose drilling

  • Product typeDrill Bits
  • 5/16 in diameter drills standard holes
  • 135 degree split point starts on contact
  • High-speed steel resists wear in steel
  • Black oxide finish reduces friction and heat
  • Right-hand cutting clears chips efficiently

Product Identity

The Cle-Line C23476 is a 5/16 inch screw machine drill bit made from high-speed steel with a black oxide finish. It features a 135 degree split point and right-hand cutting direction for general-purpose drilling tasks.

Suitability

This bit suits machinists and maintenance technicians who need a 0.3125 inch drill with a split point that reduces walking on contact. Buyers who require coolant-through capability or a different point angle should look at other options.

Critical Specification

The 135 degree split point angle is the defining specification that determines how the bit engages the workpiece and whether it matches the material hardness and drilling conditions you are working with.

How it compares

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

Price $1.99
Cheaper than about 98% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLE-LINE
Product typeDrill Bits

Questions about this item

How do I install the 5/16 in split-point bit in my drill chuck without it walking?

Open the chuck fully, insert the 0.3125 in shank straight, and tighten evenly on all three jaws so the 135-degree split point centres itself before you apply pressure.

When will the black-oxide high-speed steel cutting edges need replacement?

Replace the bit when the split point no longer self-centres or the black oxide coating has worn away and the edges show visible rounding under magnification.

What is the first limit I will hit during sustained drilling with this right-hand bit?

Heat buildup at the 135-degree point is the first limit; without coolant-through capability the bit loses hardness quickly if chips are not cleared every few seconds.

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