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Chicago-Latrobe 50876 cobalt drill bit #21 straw finish 135-degree split point

Chicago-Latrobe

Chicago-Latrobe 50876 Screw Machine Drill Bit #21 135 Degrees

SKU CH-397V-BDRAV

A #21 cobalt steel drill bit with a 135-degree split point for precise screw machine drilling

  • Product typeDrill Bits
  • Main materialCobalt Steel
  • #21 size matches precise hole requirements
  • 135-degree split point starts cleanly without wandering
  • Cobalt steel resists heat for longer cutting life
  • Straw finish identifies cobalt grade at a glance
  • Right-hand cutting suits standard drill chucks

Chicago-Latrobe 50876 Drill Bit

The Chicago-Latrobe 50876 is a screw machine drill bit sized #21 with a decimal equivalent of .1590. It is built for machinists and maintenance technicians who need accurate holes in metal using portable or stationary equipment.

Cobalt Steel Construction and Split Point

Cobalt steel construction provides high heat resistance and extended cutting life in tough alloys. The 135 degree split point is self-centering, reducing walk on curved surfaces and lowering the thrust required during hand-held or machine drilling.

Replaces Worn High-Speed Steel Bits

This bit replaces dull or broken high-speed steel drills when hole quality and tool life become critical. The upgrade is worth it for repetitive production runs or tough materials where frequent resharpening slows the job down.

How it compares

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

Price $1.99
Cheaper than about 98% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits
Size & build
Main materialCobalt Steel

Questions about this item

What does the 135-degree split point do for this drill bit?

The 135-degree split point enables self-centering starts and reduces walking on hard materials, improving accuracy in screw-machine applications.

What shank dimensions does the #21 size require for toolholder fit?

The #21 size has a 0.1590-inch decimal equivalent diameter, so the toolholder or collet must accept that exact round shank.

How should this cobalt steel bit be installed to avoid premature wear?

Secure the bit fully in the chuck with the flutes clear of the jaws, use cutting fluid, and run at the correct RPM for the material to prevent overheating the cobalt edge.

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