Fractional/Self-Starter, TiN 3/16" - 7/8" - Unibit

The Unibit UN4T Fractional/Self-Starter step drill bit is engineered for precision and durability, making it an essential tool for professional automotive and industrial applications. This versatile bit features a Titanium Nitride (TiN) coating and a self-starting tip, allowing technicians to create clean, accurate holes from 3/16 inch to 7/8 inch without the need for a pilot hole.

Key Features

• Self-Starting Tip: Designed to begin drilling immediately on contact, this feature eliminates the need for pre-drilling pilot holes, increasing efficiency and saving time for professional technicians.
• Fractional Increments: Drills precise holes in 12 standard fractional inch sizes, ranging from 3/16" to 7/8". This consolidates multiple drill bit sizes into one tool, reducing inventory.
• Titanium Nitride (TiN) Coating: The gold-colored TiN coating significantly enhances surface hardness, reduces friction, and extends the tool's lifespan by providing superior wear and heat resistance. This allows for faster, cooler drilling and consistent performance in demanding environments.
• Single-Flute Design: Engineered for greater control during drilling, the single-flute cutting edge ensures smooth, clean, and accurately round holes in various materials.
• Durable Construction: Built with High-Speed Steel (HSS) and enhanced by the TiN finish, this step drill bit is robust and delivers consistent, professional-grade performance across multiple demanding applications.

Applications

The Unibit UN4T is ideal for creating clean, burr-free holes in thin materials, a common requirement in professional settings.

• Sheet Metal Fabrication: Effectively creates clean, smooth holes in steel, aluminum, copper, brass, and other sheet metals without deformation.
• Electrical Installations: Perfect for enlarging existing knockouts in electrical boxes, junction boxes, and control panels, as well as drilling precise holes for conduit and wiring.
• HVAC Systems: Used for drilling accurate holes for ductwork, conduit, and mounting hardware in various HVAC components.
• Automotive Repair and Customization: Valuable for custom modifications, panel work, and installations in automotive and trailer sheet metal, including exhaust systems and chassis work.
• Plastics and Composites: Drills effectively through various plastic materials like Plexiglas and laminates without cracking or chipping, ensuring a clean finish.
• General Industrial Use: Versatile for a wide range of drilling tasks in thin materials within industrial workshops and manufacturing environments.

Specifications

• Manufacturer: Unibit
• Model Number: UN4T
• Drill Bit Type: Step Drill Bit
• Coating: Titanium Nitride (TiN)
• Drilling Range: 3/16 inch to 7/8 inch (in fractional increments)
• Number of Steps: 12
• Weight: 0.2 lbs
• Dimensions: 6.25 x 3.45 x 1.5 inches
• Shank Diameter: 3/8 inch