Chicago-latrobe 53873 Jobber Drill Bit Letter F Hss Tin

Product Description

The CHICAGO-LATROBE 53873 is a jobber-length drill bit sized to Letter F (0.2570 inches) and built for heavy-duty drilling in steel alloy and similar ferrous materials. The bit is manufactured from high speed steel and coated with titanium nitride (TiN) to extend cutting life and reduce heat buildup at the tip. The 135-degree split point initiates cuts quickly without a center punch and minimizes walking on hard surfaces. A parabolic flute geometry moves chips out of the hole efficiently, reducing recutting and heat accumulation during deeper passes. At 4.125 inches overall length with a 2.875-inch flute, this is a standard jobber proportion suited for benchtop drill presses, CNC drilling centers, and hand-held power drills.

This bit is intended for drilling steel alloy workpieces in light manufacturing, fabrication, mechanical maintenance, and trade service applications. The straight-cylindrical shank at 0.2570 inches diameter seats securely in standard keyless or keyed three-jaw chucks without adapters. The Series 150DHT designation places this bit in CHICAGO-LATROBE's heavy-duty TiN-coated line, which is engineered for production and repetitive-use environments where bit longevity under load matters more than initial cost.

Key Features

• Letter F size — 0.2570 inches diameter with a tolerance of -0.0010 to 0.0000 inches for consistent hole sizing
• 135-degree split point with web thinning reduces thrust force and eliminates pilot-hole requirements on most steel surfaces
• Titanium nitride (TiN) coating increases surface hardness and extends tool life compared to uncoated HSS bits
• Parabolic flute profile promotes fast chip evacuation in deep-hole drilling applications
• Tapered web configuration with web thinning maintains strength while lowering cutting resistance
• Right-hand cut, straight-cylindrical shank — compatible with standard drill chucks

Compatibility

Designed as an OEM-style replacement or direct service bit for use in standard three-jaw drill chucks accepting a 0.2570-inch straight-cylindrical shank. Suited for drilling steel alloy workpieces as specified by the manufacturer for this series.

Installation Notes

Install and remove drill bits only after the drill press or power tool is fully de-energized and the chuck has stopped rotating. Secure the shank fully in the chuck and verify runout is within acceptable limits before beginning a cut. TiN-coated bits should not be reground without removing the coating in the regrind zone, as uneven coating can affect balance and cut quality. Follow applicable OSHA and shop-safety guidelines for eye protection and workpiece clamping when drilling metal.