M.a. Ford. 20531500T Screw Machine Drill Bit 0.315 in

Product Description

The M.A. FORD. 20531500T is a screw machine length drill bit engineered for demanding material removal in cast iron, stainless steel, non-ferrous metals, and steel. Built from solid carbide with a coated finish, it delivers the hardness and wear resistance needed for high-cycle production drilling. The bit measures 0.315 inches in diameter with a 135-degree split point that reduces walking on entry and minimizes thrust load. Overall length is 2.7953 inches, making it a compact, rigid tool suited for CNC machining centers, drill presses, and screw machines where tool stick-out must be kept short. It is installed and used by machinists and manufacturing maintenance professionals.

This drill bit is a strong fit for production shops working with ferrous and non-ferrous stock, including stainless steel and cast iron components. The screw machine length body provides enhanced rigidity compared to jobber-length bits, reducing deflection on interrupted cuts and in cross-drilled hole applications. It carries a Series 205 designation and a flute-to-diameter ratio of 3xD, which suits shallow-to-moderate depth holes in tight-tolerance work. The right-hand cut and slow spiral flute geometry help control chip evacuation in materials that generate long, stringy chips.

Key Features

• Solid carbide construction for superior hardness and wear resistance in ferrous and non-ferrous materials
• 135-degree split point reduces entry thrust and eliminates the need for a center punch on most surfaces
• Screw machine length body maximizes rigidity and minimizes deflection in short-depth drilling applications
• Slow spiral flute geometry with web-thinned parallel web improves chip flow in difficult-to-machine alloys
• Coated finish extends tool life by reducing friction and heat buildup at the cutting edge
• Straight-cylindrical shank fits standard drill chucks and collet holders without adapters

Compatibility

Designed for use in CNC machining centers, manual drill presses, and screw machines with standard straight-shank tool holding. Suitable for primary workpiece materials including cast iron, non-ferrous metals, stainless steel, and steel.

Installation Notes

Install and remove this bit only while the machine spindle is fully stopped and locked out per applicable machine guarding and lockout/tagout procedures. Solid carbide tooling is brittle and should be seated firmly and concentrically in the chuck or collet to prevent runout-induced chipping. Confirm correct spindle speed and feed rate for the workpiece material before beginning the cut. Do not use coolant-through fixtures, as this bit does not support coolant through the body.