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Silver cylindrical twist drill bit with gold tip marked 27/64

Cle-Line

Cle-Line 18653 27/64" HSS 135° Jobber Drill Bit

SKU CH-JKWF-HYFD7

27/64 inch high-speed steel jobber drill bit with 135-degree split point for accurate starts

  • Product typeDrill Bits
  • 135-degree split point reduces walking on hard surfaces
  • High-speed steel construction resists wear during repetitive drilling
  • TiN coating lowers friction for smoother chip evacuation
  • 27/64-inch diameter matches precise fractional sizing needs
  • Jobber length provides standard reach for general-purpose tasks

Cle-Line 27/64" HSS Jobber Drill Bit

This Cle-Line drill bit is a fractional-inch cutting tool made from High Speed Steel for general-purpose drilling. It has a 27/64 inch diameter with a decimal equivalent of .4219 and a jobber length suitable for standard drilling tasks in metal and wood.

135° Split Point with TiN Coating

The 135 degree split point reduces walking and starts holes without a centre punch. A Titanium Nitride coating increases surface hardness and heat resistance, which extends cutting life compared to uncoated High Speed Steel bits in repetitive use.

Suited for maintenance and fabrication work

This bit fits machinists and maintenance technicians who need a durable fractional-size drill for steel, cast iron and non-ferrous metals. It is not designed for coolant-through applications, so operators requiring internal lubrication delivery should look elsewhere. Buyers needing metric sizes or longer series lengths will also need a different tool.

How it compares

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

Price $10.99
Cheaper than about 86% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLE-LINE
Product typeDrill Bits

Questions about this item

How often will the 135-degree split point need resharpening on this HSS bit?

The 135-degree split point on the 27/64" HSS bit resists walking and cuts efficiently, but high-speed steel dulls faster than cobalt or carbide; expect to resharpen after drilling several dozen holes in mild steel, fewer in harder alloys.

At what point does the 0.4219-inch diameter cause the bit to overheat during continuous drilling?

Heat builds quickly once chip evacuation slows in the 27/64" flute; without coolant holes, sustained drilling in steel will overheat the tip within minutes, so use cutting fluid and peck-drilling cycles to manage temperature.

How much noise and heat does the TiN-coated 18653 produce when run all day in a hand drill?

The TiN coating on the 27/64" jobber bit reduces friction and extends life, but a hand drill spinning this diameter continuously will still generate noticeable whine and a hot shank; pause regularly to let the bit cool.

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