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Chicago-Latrobe #30 jobber drill bit, black oxide finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 45700 #30 135° split-point jobber drill bit

SKU CH-8GKQ-YF5KG

A #30 high-speed steel jobber drill bit with a 135° split point for self-centering starts and a black oxide finish for wear resistance

  • Product typeDrill Bits
  • Main materialHAWA
  • #30 wire size for precise hole placement
  • 135° split point starts on contact without walking
  • High-speed steel construction resists wear in tough materials
  • Black oxide finish reduces friction and improves chip flow
  • Jobber length gives standard reach for general drilling

Chicago-Latrobe #30 split-point drill bit

The Chicago-Latrobe 45700 is a #30 jobber-length drill bit designed for general-purpose drilling in metal, wood and plastic. Its 135-degree split point reduces walking and starts holes cleanly without a centre punch. Machinists, maintenance technicians and DIY users will find it suited to repetitive production work and occasional repairs alike.

High-speed steel construction

The bit is made from high-speed steel and carries a black oxide coating that resists corrosion and reduces chip welding during normal use. The 135-degree point angle distributes cutting forces evenly, helping to limit heat build-up and extend edge life when drilling at standard speeds. No coolant-through holes are present, so external lubrication is recommended for deeper cuts.

Fits standard 3-jaw chucks and quick-change holders

The straight shank seats securely in any drill press, hand drill or impact driver that accepts a #30 shank, freeing the user from proprietary collets or adapters. The jobber length provides sufficient reach for through-holes in typical workpiece thicknesses while remaining rigid enough for hand-held operation. The split-point geometry eliminates the need for a separate centre-drill step in most materials.

How it compares

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

Price $1.47
Cheaper than about 99% 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

How do I install the Chicago-Latrobe 45700 #30 drill bit in my drill chuck, and what step do people often get wrong?

Insert the straight shank fully into the chuck jaws, then tighten securely. The step people miss is verifying the bit runs true before drilling; an off-centre bit wanders and dulls the 135° split point quickly.

What maintenance or replacement will the Chicago-Latrobe 45700 #30 bit need over time?

The high-speed steel cutting edges will dull with use. Resharpen the 135° split point on a proper grinder or replace the bit once the web thickness is reduced and the point can no longer self-centre at .1285 diameter.

What limit appears first when using the Chicago-Latrobe 45700 #30 bit continuously in tough material?

Heat buildup at the 135° split point is the first limit. The black oxide finish helps chip flow but offers no coolant path, so sustained drilling without peck cycles or cutting fluid causes temper loss and rapid edge wear.

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