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Chicago-Latrobe 49256 Y-size drill bit, 135-degree split point, black oxide finish

Chicago-Latrobe

Chicago-Latrobe 49256 Y-size drill bit 135° split point .4040

SKU CH-AHEP-XHJMH

High-speed steel Y-size drill bit with 135° split point for precise drilling at .4040 decimal equivalent

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point reduces walking on hard materials
  • Y-size .4040 decimal suits precise screw-machine work
  • High-speed steel body resists heat during fast drilling
  • Black oxide finish adds lubricity and corrosion resistance
  • Right-hand cutting direction matches standard equipment

Chicago-Latrobe 49256 Y-size drill bit

The Chicago-Latrobe 49256 is a Y-size screw machine drill bit built for precision drilling tasks. It suits machinists and maintenance technicians who need accurate hole sizing in metalworking applications. The .4040 decimal equivalent ensures compatibility with specific fastener requirements. This tool is not for buyers who need coolant-through capability or larger diameter cutting.

135° split point performance under load

The 135 degree split point geometry reduces thrust and prevents walking during initial contact. High speed steel construction maintains hardness during sustained drilling cycles in steel and alloy materials. Black oxide finish aids chip evacuation and reduces friction buildup over extended use. Right hand cutting direction matches standard machine spindle rotation.

High speed steel build and shank fit

High speed steel body with black oxide coating resists wear and corrosion in shop environments. Standard straight shank fits common drill chucks and collets without adapters. Non-coolant through design suits dry machining or external flood cooling setups. This bit is not for operators requiring through-spindle coolant delivery or left hand cutting orientation.

How it compares

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

Price $7.99
Cheaper than about 91% 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

What shank type does the 49256 drill bit use so it fits my drill chuck?

The 49256 bit has a straight shank that fits standard three-jaw drill chucks without a special collet or adapter.

Will the 135-degree split point on the .4040 bit start cleanly in the hardened steel I already drill?

The 135-degree split point on the .4040 bit reduces walking and starts cleanly in hardened steel, matching the performance of the bits you already use.

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