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Chicago-Latrobe 49228 7/16 inch screw machine drill bit with black oxide finish and 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 49228 Screw Machine Drill Bit 7/16 in 135 Degrees

SKU CH-TJT5-AP7TJ

A 7/16 inch screw machine drill bit with a 135-degree split point for accurate starting

  • Product typeDrill Bits
  • Main materialHAWA
  • 7/16 in size drills standard holes
  • 135-degree split point starts on contact
  • High-speed steel resists wear in metal
  • Black oxide finish reduces friction and rust
  • Right-hand cutting clears chips efficiently

Precision 7/16 in drill bit

The Chicago-Latrobe 49228 is a screw-machine drill bit sized at 7/16 inch with a 135-degree split point. Made from high-speed steel with a black oxide finish, it is designed for right-hand cutting in general-purpose drilling tasks.

135-degree split point

The 135-degree split point is the specification that determines suitability; it centres the bit quickly and reduces walking on hard materials. This geometry works well in steel and alloy but is not intended for deep-hole or coolant-fed operations.

Decimal equivalent 0.4375 in

The bit drills a 0.4375 inch hole, covering standard 7/16 inch clearance and tapping requirements. It lacks coolant-through capability, so chip evacuation and heat become limiting factors in deep or high-speed production runs.

How it compares

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

Price $5.99
Cheaper than about 93% 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 does the 135-degree split point behave once the bit is in a drill?

The 135-degree split point centres itself on contact, reduces walking and cuts cleanly in high-speed steel without needing a pilot hole

What shank standard does this bit use and what chuck size does it require?

It has a straight shank sized at .4375 in decimal equivalent, so it fits any three-jaw chuck that opens to at least 7/16 in

What physical clearance is needed to mount and use this bit?

The bit measures 7/16 in diameter with a right-hand cutting direction, so the workpiece and fixture must allow that full width and rotation clearance

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