Hertel 16704835 Screw Machine Drill Bit Size 47 Carbide

Product Description

The HERTEL 16704835 is a screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built from solid carbide, this bit delivers the rigidity and edge retention needed when working with hard and abrasive materials. It features a 135-degree split-point geometry for fast penetration and reduced walking on entry, eliminating the need for a center punch in most setups. With an overall length of 1.75 inches and a flute length of 0.75 inches, the compact screw machine length profile provides maximum support and minimal deflection in close-clearance drilling situations. Right-hand cut with a straight cylindrical shank and slow spiral fluting rounds out the design for controlled chip evacuation.

This bit is suited for production and job-shop environments where drilling into hard ferrous and specialty metals is routine. The solid carbide construction and 135-degree point make it appropriate for use on cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel workpieces. It is typically run in CNC machining centers, drill presses, and screw machines where rigid setups allow carbide tooling to perform at rated speeds. The bright uncoated finish is appropriate for applications where coating compatibility with cutting fluids or workpiece materials is a consideration.

Key Features

• Solid carbide construction for superior hardness and wear resistance in difficult materials
• 135-degree drill point angle reduces thrust force and minimizes drill walking on entry
• Screw machine length profile at 1.75 inches OAL provides rigidity and reduced deflection
• Slow spiral flute geometry aids chip control in tough, stringy, or work-hardening materials
• Right-hand cut with straight cylindrical shank for compatibility with standard drill chucks and collets
• Bright uncoated finish suitable where bare carbide is preferred for fluid compatibility

Compatibility

Designed as a screw machine length replacement drill bit for use with standard straight-shank drill chucks and collets in CNC machining centers, drill presses, and screw machines. Suited for workpieces in the 0.0000 to 0.1000 inch decimal inch drill size range.

Installation Notes

Carbide drill bits require rigid machine setups to avoid chipping or breakage — avoid use in handheld drills or flexible fixturing. Ensure the spindle and chuck are clean and properly secured before seating the straight cylindrical shank. Power down and lock out the machine before changing tooling. Verify spindle speed and feed rate are appropriate for solid carbide tooling in the target workpiece material before initiating a cut.