Accupro 61534350 Carbide Screw Machine Drill Bit 0.1285 in

Product Description

The ACCUPRO 61534350 is a solid carbide screw machine length drill bit designed for precision drilling in tight-tolerance applications. It carries a 0.1285 inch diameter (Wire Size 30) with a 140-degree split point and an AlTiN (aluminum titanium nitride) coating that extends tool life in abrasive and hard materials. The straight-cylindrical shank and web-thinned, parallel-web construction reduce entry force and improve chip evacuation. At 2.441 inches overall length, this stub-length bit delivers added rigidity compared to jobber-length tooling, making it well suited for CNC machining centers, drill presses, and manual operations where deflection must be minimized. Machinists, tool-and-die workers, and production shop technicians are the primary users.

This drill bit is built for high-performance production drilling in ferrous and non-ferrous metals, stainless steels, cast iron, and hardened alloys where standard HSS tooling wears prematurely. The AlTiN finish performs well at elevated cutting temperatures, making it a strong choice for dry or semi-dry machining environments. The short screw machine length body suits applications where workpiece access is limited or where a rigid, low-deflection setup is required on multi-axis CNC equipment. Coolant-through capability supports high-feed operations where chip flushing and heat management are critical.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• AlTiN coating extends tool life at high cutting temperatures in dry or semi-dry operations
• 140-degree standard point angle with web-thinned, parallel-web geometry reduces thrust force at entry
• Coolant-through design supports chip evacuation and thermal management in high-feed drilling
• Screw machine (stub) length at 2.441 inches overall provides increased rigidity versus jobber-length bits
• Right-hand spiral flute, 2-flute configuration, 3xD flute-to-diameter ratio
• ISO specification designation; rated as high-performance grade

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for standard straight-cylindrical shank drill chucks and collet holders accepting a 4.00 mm (approximately 0.157 inch) shank diameter in CNC machining centers, drill presses, and manual drilling equipment.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with carbide drill handling. Ensure the spindle is fully stopped and the machine is locked out before inserting or removing tooling from any chuck or collet. Carbide is brittle — avoid lateral loading or impact that can chip the cutting edges. Verify runout at the shank before initiating a cut, as excessive runout accelerates edge wear and can cause premature breakage.