Cleveland C11621 3/8 Inch Hss Jobber Drill Bit 135 Degree

Product Description

The CLEVELAND C11621 is a jobber-length twist drill bit designed for precision hole-making in metal fabrication, maintenance, and general machining applications. It measures 3/8 inch (0.3750 inch) in diameter with a 5-inch overall length and a 3-5/8-inch flute length. The bit is ground from high speed steel with a bright, uncoated finish and features a 135-degree split-point tip that reduces walking and requires no center punch on most workpieces. The right-hand spiral flute geometry clears chips efficiently during drilling. This bit is sized and built for heavy-duty use and meets NAS 907 Type B standards.

The C11621 is suited for drilling aluminum and similar non-ferrous metals, as well as general-purpose drilling in light steel and plastics. It fits standard drill chucks via its straight-cylindrical shank with a 3/8-inch shank diameter. Machinists, maintenance technicians, pipefitters, and HVAC fabricators commonly use jobber-length bits in this size range for field and shop work. The regular spiral type provides balanced feed rates across a variety of drill press, hand drill, and mill applications.

Key Features

• 135-degree split point reduces drill walking and improves hole accuracy without a center punch
• High speed steel construction rated for heavy-duty drilling applications
• Bright uncoated finish suitable for aluminum and general-purpose materials
• Right-hand cut with regular spiral and 2-flute design for efficient chip evacuation
• Web-thinned, tapered web configuration reduces thrust and extends tool life
• Meets NAS 907 Type B specification

Compatibility

Designed as a standard jobber-length drill bit for use in any 3/8-inch or larger keyed or keyless drill chuck. Primary listed workpiece material is aluminum; also suitable for general drilling in plastics and light ferrous metals per NAS 907 Type B application guidelines.

Installation Notes

A licensed machinist or qualified technician should secure the bit firmly in the chuck before operation, ensuring the straight shank is fully seated. Always power down and de-energize the drill press or hand drill before changing bits. Eye protection and work-holding fixtures are required per standard shop safety practices. Do not exceed the recommended feed rate for the workpiece material or attempt to use this bit as a reamer.