Osg 8671150 Carbide Screw Machine Drill Bit 0.4528 in

Product Description

The OSG 8671150 is a solid carbide screw machine length drill bit designed for high-performance drilling in ferrous materials. With a 0.4528-inch (11.50 mm) diameter and a 140-degree split point, it delivers precise entry and reduced walking on hard surfaces. The R-thinned web reduces thrust force at the center, making it well suited for production drilling environments where cycle time and hole quality matter. At 102.00 mm overall length, this stub-length geometry provides added rigidity compared to jobber-length bits, minimizing deflection in short-hole applications. Licensed machinists, tool-and-die tradespeople, and industrial maintenance technicians are the primary users of this bit.

The OSG 8671150 is intended for drilling steel, alloy steel, and cast iron in both shop and field environments. It belongs to OSG Series 6300 and carries a 2xD flute-to-diameter ratio, making it appropriate for through-holes and blind holes within that depth range. The coated finish extends tool life in abrasive ferrous materials. This bit is a strong fit for CNC machining centers, drill presses, and manual turret lathes where a straight-cylindrical shank and consistent diameter tolerance are required for reliable chuck engagement.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• 140-degree point angle reduces thrust and improves self-centering on entry
• R-thinned web lowers drilling thrust at the chisel edge
• Screw machine (stub) length provides superior rigidity and reduced deflection
• Coated finish extends tool life when drilling steel and alloy steel
• Straight-cylindrical shank with 12.00 mm shank diameter fits standard chucks without adapters

Compatibility

Designed for drilling steel, alloy steel, and cast iron workpieces. Compatible with any drill press, CNC machining center, or turret lathe equipped to accept a straight-cylindrical 12.00 mm shank and capable of the feed and speed parameters appropriate for solid carbide tooling.

Installation Notes

Solid carbide tooling requires secure chuck or collet engagement to prevent slippage and bit breakage. Always confirm the spindle and workpiece are properly fixtured before starting the cut. Carbide is brittle compared to high-speed steel - avoid interrupted cuts or side loading beyond the designed flute depth. No coolant-through capability is present on this bit, so adequate external coolant or cutting fluid should be applied when drilling at production feed rates in steel.