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Chicago-Latrobe 78720 carbide drill bit, 118 degree point, bright finish

Chicago-Latrobe

Chicago-Latrobe 78720 Screw Machine Drill Bit 3/8 in 118 Degrees

SKU CH-P28T-7D2D5

Carbide screw-machine drill bit with 118-degree four-facet point for right-hand cutting at .3750 decimal equivalent

  • Product typeDrill Bits
  • Main materialHAWA
  • Carbide construction resists wear for longer tool life
  • 118 degree point angle centres quickly in metal
  • Bright uncoated finish reduces friction during drilling
  • 3750 decimal size matches standard 3/8 inch chucks
  • Right-hand cutting direction suits conventional drilling machines

Chicago-Latrobe 78720 Screw Machine Drill Bit 3/8 in

The Chicago-Latrobe 78720 is a screw machine drill bit made from HAWA carbide with a bright uncoated finish. It features a 118 degree point angle and a 4 facet point geometry. The cutting direction is right hand and the decimal equivalent is .3750 inches.

Suited for precision drilling.

This bit suits machinists who need a rigid, right-hand cutting tool for screw machine operations. The non-coolant-through design means it is not intended for through-spindle coolant delivery. Buyers needing internal coolant channels should look at a different drill bit style.

118 degree 4 facet point angle

The 118 degree 4 facet point determines how the bit centres and cuts. This geometry is chosen for general-purpose drilling in a range of materials. If your application demands a different point angle or facet count, this drill bit will not match the requirement.

How it compares

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

Price $84.99
Pricier than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits
Size & build
Main materialHAWA

Questions about this item

Which Chicago-Latrobe 78720 drill bit size should I select for a 3/8 inch hole?

The 78720 model is a single 3/8 inch size with a .3750 decimal equivalent, so there is no alternative capacity to choose.

What does the 118 degree point angle mean when the bit is in a drill press?

The 118 degree angle with four facet geometry centres the cut quickly in steel and reduces wandering on flat surfaces.

How does the bright uncoated carbide surface affect cutting performance?

The uncoated carbide runs cooler in short-run screw machine work and can be resharpened without stripping a coating first.

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