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Cle-Line C18051 jobber drill bit, 135-degree split point, .3970 black oxide HSS

Cle-Line

Cle-Line C18051 135° .3970 Split-Point Jobber Drill Bit

SKU CH-JG1F-AWRH9

135° split-point HSS jobber drill bit with .3970 decimal equivalent and black oxide finish

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point starts on contact for accurate holes
  • High-speed steel construction resists wear in tough materials
  • Black oxide finish reduces friction and adds corrosion resistance
  • .3970 decimal size fits precise letter-gauge applications

135° Split-Point Jobber Drill Bit

The Cle-Line C18051 is a high-speed steel drill bit designed for general-purpose metal drilling. Its 135-degree split-point tip reduces walking and starts holes cleanly without a centre punch. The black oxide finish adds corrosion resistance and helps retain lubricant during use. It suits maintenance engineers and fabricators who need reliable, accurate holes in steel and alloy.

Decimal .3970 Size and Headroom

At a decimal equivalent of .3970 inch, this letter-size bit handles medium-diameter fastening and clearance tasks in structural and automotive work. The jobber-length flute clears chips efficiently up to its full working depth. It is not suited for deep-hole drilling beyond standard jobber reach, high-volume production runs requiring carbide tooling, or coolant-through operations where internal lubrication is mandatory.

How it compares

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

Price $5.99
Cheaper than about 93% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLE-LINE
Product typeDrill Bits
Size & build
Main materialHAWA

Questions about this item

Will the 135° split point on the C18051 start cleanly in existing holes drilled by older bits?

The 135° split point is designed for self-centering and reduced walking, which helps it engage accurately when entering an existing hole.

How can I confirm the C18051 is cutting properly after installation?

A properly cutting bit produces a continuous, unbroken chip and advances steadily without excessive pressure or squealing.

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