Accupro 50373 Jobber Drill Bit 5.5mm Solid Carbide Altin

Product Description

The ACCUPRO 50373 is a jobber-length drill bit designed for precision drilling in hard and abrasive materials. Built from solid carbide and coated with AlTiN (Aluminum Titanium Nitride), it handles elevated cutting temperatures while maintaining edge integrity. The 5.5 mm diameter bit features a 150-degree drill point angle and three spiral flutes with a right-hand cutting direction, making it well suited for high-speed drilling operations in ferrous metals, stainless steel, cast iron, and hardened alloys. Overall length is 2.99 inches with a flute length of 1.34 inches. The straight cylindrical shank seats securely in standard drill chucks and collet holders.

This bit is intended for use in CNC machining centers, drill presses, and handheld power tools where consistent hole quality and dimensional accuracy are required. It falls in the 0.2000 to 0.2500 decimal inch drill size range, conforming to ANSI specification designations. Machinists, tool-and-die workers, and precision fabricators working in production or job-shop environments are the primary users. The 5xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes without through-coolant.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating increases surface hardness and heat resistance at the cutting edge
• 150-degree drill point angle reduces thrust force and improves centering on hard stock
• Three-flute spiral design improves chip evacuation and surface finish compared to two-flute geometry
• Right-hand cutting direction compatible with standard spindle rotation
• Straight cylindrical shank fits standard ER collets and Jacobs-style chucks

Compatibility

Designed as a standard jobber-length drill bit conforming to ANSI specifications, compatible with any drill press, CNC machining center, or handheld drill accepting a straight cylindrical shank in the 5.5 mm diameter range.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully in the collet or chuck and verify runout before beginning a cut. Solid carbide tooling is brittle and should not be used in setups with excessive vibration or lateral loading.