Hertel 74148693 Screw Machine Drill Bit 1.00 Mm Carbide

Product Description

The HERTEL 74148693 is a screw machine length drill bit ground from solid carbide with a 135-degree split point and web-thinned geometry. At 1.00 mm in diameter (0.0394 inches decimal equivalent) with a 1-1/2 inch overall length, this stub-length bit delivers the rigidity needed for accurate hole entry in hard and abrasive materials. The slow spiral flute design controls chip evacuation in deep-hole applications on tough alloys. The bright uncoated finish is suited for use with cutting fluids. A straight cylindrical shank and parallel web configuration keep runout minimal and support consistent tool-holding in collet chucks and drill chucks alike. Licensed machinists and toolroom operators are the primary users.

This bit is engineered for drilling cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel. The short overall length minimizes deflection during small-diameter drilling operations, making it a practical choice for CNC machining centers, manual mills, and precision drill presses. The 135-degree split point reduces thrust force and eliminates the need for a center punch on flat stock. It is offered individually and is part of the HSSC135-SS series, which targets hard and stainless material applications.

Key Features

• Solid carbide construction for strength and wear resistance in hard alloys
• 135-degree split point with web thinning reduces entry thrust and improves self-centering
• Slow spiral flute geometry aids chip control in stainless steel and titanium alloys
• Screw machine (stub) length provides added rigidity and reduces deflection at small diameters
• Bright uncoated finish compatible with a wide range of cutting fluids and lubricants
• Straight cylindrical shank fits standard collet and drill chuck toolholders

Compatibility

Designed as a screw machine length carbide drill for use in materials including cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel as specified by the manufacturer for the HSSC135-SS series.

Installation Notes

Installation of small-diameter carbide drill bits should be performed by a qualified machinist or toolroom technician. Secure the shank fully in a collet or drill chuck rated for the spindle speed required by the workpiece material and diameter. Carbide is brittle - avoid side loading, interrupted cuts without proper feed reduction, or using bent or worn toolholders that can cause fracture. Always verify spindle runout and apply cutting fluid appropriate to the workpiece material before beginning the operation.