Value Collection 01189208 Letter T Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION 01189208 is a high speed steel jobber-length drill bit sized to letter T (0.3580 inch decimal equivalent). It features a standard 118-degree split point with web thinning on a tapered web, which helps center the bit and reduces the thrust needed to start a hole. The oxide coating provides light corrosion resistance and reduces friction during cutting. With an overall length of 4.875 inches and a 3.5-inch spiral flute, this is a general-purpose two-flute bit suited for production drilling in steel, cast iron, and similar ferrous materials. Licensed tradespeople and machinists reach for this size when fractional and metric sizes fall short of the required hole diameter.

This drill bit is designed for right-hand rotation and straight-cylindrical shank mounting, making it compatible with standard drill chucks on drill presses, portable electric drills, and CNC machines fitted for straight-shank tooling. The regular spiral flute geometry promotes consistent chip evacuation in through-hole and blind-hole applications in steel and cast iron. It is a general-purpose grade suited for maintenance, repair, fabrication shops, and light production environments where letter-size hole tolerances are required.

Key Features

• Letter T size — 0.3580 inch decimal equivalent for precise letter-series hole tolerances
• 118-degree standard point angle with web thinning for reduced entry thrust and improved centering
• High speed steel (HSS) construction withstands heat generated in steel and cast iron drilling
• Oxide coating reduces friction and provides light surface protection
• Regular spiral flute geometry with tapered web promotes reliable chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber drill bit for use in standard straight-shank drill chucks on drill presses, hand drills, and CNC equipment. Primary workpiece materials are steel and cast iron.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals working with metal fabrication or mechanical assembly. Secure the straight shank fully in the chuck and verify concentricity before drilling to prevent bit walk. Always power down and lock out the machine before changing tooling. Use appropriate cutting fluid or coolant on ferrous workpieces to extend bit life, even though this bit does not support internal coolant-through delivery.