We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Chicago-Latrobe 43794 drill bit, 135-degree split point, TiCN coated high-speed steel

Chicago-Latrobe

Chicago-Latrobe 43794 135 Degree Heavy-Duty Jobber Length Drill

SKU CH-QC54-MT3FR

A 135-degree split-point jobber drill bit in high-speed steel with TiCN coating, sized at .3970 decimal equivalent

  • Product typeDrill Bits
  • 135° split point reduces walking for accurate hole starts
  • TiCN coating extends tool life in tough materials
  • High-speed steel construction handles heavy-duty drilling tasks
  • Jobber length provides versatile reach for common applications
  • Decimal size .3970 matches letter-gauge specifications

Chicago-Latrobe 43794 Jobber Drill Bit

This Chicago-Latrobe 43794 drill bit features a 135 degree split point design for accurate starts in metal. The heavy-duty jobber length suits general-purpose drilling tasks in workshop and maintenance environments. It targets machinists and technicians who need reliable hole-making performance. High-speed steel construction provides durability across a range of ferrous materials.

TiCN Coated High-Speed Steel Construction

The TiCN coating increases surface hardness and wear resistance compared to uncoated bits. This reduces friction during operation and extends tool life in repetitive drilling cycles. The non-coolant-through design means the bit relies on external lubrication or air cooling. Users must supply cutting fluid or compressed air to manage heat effectively in deep holes.

Sustained Drilling Performance Characteristics

Under continuous load, the split point geometry maintains centering without wandering. The coating helps dissipate heat generated during prolonged cuts in tough alloys. Decimal size .3970 matches specific letter gauge requirements for precision fits. The lack of coolant holes requires periodic withdrawal to clear chips and prevent binding.

How it compares

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

Price $16.99
Cheaper than about 70% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

How does the 135 degree split point behave when the bit gets hot during extended drilling?

The 135 degree split point is designed to reduce walking and require less thrust, which helps maintain centering even as temperatures rise during sustained use.

Does the TiCN coating on this 0.3970 inch bit keep noise or heat lower during all-day operation?

The TiCN coating increases surface hardness and reduces friction, which can lower heat buildup and dampen vibration compared to uncoated high-speed steel.

What shank style does the 43794 jobber bit have so I know if my drill chuck will accept it?

This bit has a straight round shank sized to its 0.3970 inch diameter, fitting any standard three-jaw drill chuck that opens to at least that size.

More in Bits, Hole Saws & Accessory Kits

Similar items