M.a. Ford 20630200 Screw Machine Drill Bit 0.302 in

Product Description

The M.A. FORD 20630200 is a screw machine length (stub) drill bit machined from solid carbide and designed for high-precision drilling in demanding shop environments. The bit measures 0.302 inches in diameter with a 118-degree faceted drill point and a bright, uncoated finish. Overall length is 2.5 inches, with a 1.25-inch straight-cylindrical shank and a 1.25-inch spiral flute length. The two-flute, right-hand-cut spiral design paired with web thinning reduces thrust load and improves chip evacuation. Machinists, tool-and-die makers, and CNC operators are the primary users of this series.

The 20630200 is suited for short-reach, high-rigidity drilling applications where a stub-length drill reduces deflection and improves hole accuracy. Primary workpiece materials include cast iron, non-ferrous metals, stainless steel, and steel. The 3xD flute-to-diameter ratio makes it appropriate for through-holes and blind holes in production machining setups where tool stability and repeatability are critical. It fits standard drill chucks and collets accepting a 0.302-inch straight shank.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• 118-degree faceted point with web thinning to reduce entry thrust and improve self-centering
• Bright/uncoated finish compatible with a wide range of cutting fluids and dry cutting applications
• Screw machine (stub) length minimizes deflection for tighter hole tolerances
• Diameter tolerance held to +0.0000 to -0.0005 inches for precision fitment
• Right-hand cut with regular spiral and parallel web configuration for consistent chip flow

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for applications requiring a 0.302-inch (Letter N) diameter stub-length carbide drill. Compatible with standard drill chucks and collets accepting a 0.302-inch straight-cylindrical shank across CNC machining centers, drill presses, and manual lathes.

Installation Notes

Installation and use should be performed by a qualified machinist or CNC operator familiar with carbide tooling. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits, as carbide is brittle and sensitive to lateral loading. Power down the spindle completely before changing or inspecting the bit. Do not use this bit for materials or feed rates outside the rated workpiece material group, as overloading solid carbide can cause catastrophic fracture.