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Silver high-speed steel left-hand drill bit, 118-degree point, uncoated finish

Chicago-Latrobe

Chicago-Latrobe 48924 Screw Machine Drill Bit 3/8 in 118 Degrees Left Hand

SKU CH-6YRK-GHNFY

A 3/8 inch high-speed steel screw-machine drill bit with a 118-degree conventional point, bright finish and left-hand cutting direction

  • Product typeDrill Bits
  • Left-hand cutting direction removes broken bolts
  • 118-degree conventional point starts holes accurately
  • High-speed steel construction resists wear
  • Bright uncoated finish suits general drilling
  • Decimal equivalent 0.3750 matches 3/8 inch size

Chicago-Latrobe 48924 Left-Hand Drill Bit

The Chicago-Latrobe 48924 is a screw machine drill bit designed for left-hand cutting operations. It suits mechanics and machinists who need to remove broken fasteners or create threads for left-hand screws. The high-speed steel construction provides durability for general-purpose drilling tasks. This bright, uncoated bit performs reliably in standard workshop environments.

3/8 inch capacity with 118-degree point angle

The bit features a 3/8 inch diameter with a decimal equivalent of .3750 for precise hole sizing. Its 118-degree conventional point angle offers effective centring and cutting across common materials like steel and cast iron. The non-coolant-through design means it handles shallow to moderate depths without internal fluid delivery. Users should note the left-hand rotation requires a compatible reversible drill or driver for proper operation.

High-speed steel build with bright finish

Manufactured from high-speed steel, the bit maintains hardness at elevated temperatures generated during drilling. The bright, uncoated surface resists corrosion during storage but lacks the friction reduction of coated alternatives. Its standard shank fits common three-jaw chucks and quick-change systems without adapters. Left-hand cutting direction makes it a specialised tool rather than a general-purpose option for right-hand threading tasks.

How it compares

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

Price $14.99
Cheaper than about 77% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

Will the 118-degree point on this 48924 bit start cleanly in a pilot hole made by a standard right-hand twist drill?

Yes, the 118-degree conventional point is designed for general-purpose drilling and will engage properly in an existing pilot hole, though the left-hand cutting direction means it removes material in reverse rotation.

How can I confirm the 48924 bit is cutting correctly once installed in my drill press?

Run the spindle in reverse at the recommended speed for high-speed steel; the bit should produce a continuous chip and a clean 0.3750-inch hole without wandering or excessive heat.

Does the 48924 come with a protective case or just the bare bright-finish bit?

The supplier data lists only the single screw-machine drill bit with bright uncoated finish; no case, sleeve or additional accessories are included.

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