Precision Twist Drill 091544 Hss Silver Deming Jobber Drill

Product Description

The PRECISION TWIST DRILL 091544 is a high-speed steel (HSS) Silver Deming jobber-length drill bit designed for reduced-shank drilling in metal fabrication and general mechanical work. The bit features an 11/16 inch tip diameter with a 1/2 inch reduced parallel shank, allowing it to chuck into standard 1/2 inch drill chucks without a larger capacity chuck. A 3-flute geometry supports chip evacuation and provides a depth of cut reaching 4 inches. The HSS construction delivers high resistance to abrasion, maintaining cutting edge integrity through repeated use in ferrous and non-ferrous materials.

This drill bit is suited for use in maintenance, repair, and fabrication environments where larger-diameter holes are required but equipment is limited to 1/2 inch chuck capacity. Typical applications include drilling through structural steel, plate stock, and heavy-gauge sheet metal. Machinists, millwrights, pipefitters, and general maintenance technicians commonly use Silver Deming bits in drill press and hand-held drill motor setups where full-size Silver Deming shanks are not practical.

Key Features

• 11/16 inch tip diameter with 1/2 inch reduced parallel shank for compatibility with standard 1/2 inch chucks
• 3-flute design promotes efficient chip clearance during deep drilling operations
• 4 inch depth of cut supports through-drilling on thick material cross-sections
• High-speed steel (HSS) construction provides strong abrasion resistance and extended tool life
• Jobber-length configuration balances reach and rigidity for general-purpose drilling

Compatibility

Designed for use in any drill press or hand-held drill motor equipped with a standard 1/2 inch chuck capacity. No specific OEM model compatibility is stated by the manufacturer for this bit.

Installation Notes

This bit is installed and used by machinists, pipefitters, millwrights, and maintenance technicians. Secure the 1/2 inch reduced shank firmly in the drill chuck before operation and verify the chuck key is removed prior to starting the machine. Use appropriate cutting fluid or lubricant when drilling ferrous metals to reduce heat buildup and extend bit life. Follow applicable OSHA and shop safety guidelines for rotating tool operation, including proper workpiece clamping and eye protection.

Technical Specifications

• Tip Diameter: 11/16 inches
• Shank Diameter: 1/2 inch reduced parallel
• Depth of Cut: 4 inches
• Overall Length: 6 inches
• Number of Flutes: 3
• Material: High-Speed Steel (HSS)
• Weight: 0.35 pounds
• UPC: 086071915443

Standard Information

• Brand: PRECISION TWIST DRILL
• Manufacturer Part Number: 091544