Hertel 84577949 Jobber Drill Bit Letter J Hss 118

Product Description

The HERTEL 84577949 is a jobber-length drill bit sized at Letter J (0.2770 inches) and manufactured from high speed steel with a bright, uncoated finish. It features a 118-degree standard point angle with web thinning and a tapered web configuration for improved centering and reduced thrust on entry. The spiral flute design runs in a regular right-hand cutting direction and evacuates chips efficiently during through-hole and blind-hole drilling. With an overall length of 4.125 inches and a flute length of 2.875 inches, this bit fits the standard jobber-length profile used across a wide range of drilling applications. A straight-cylindrical shank at 0.2770 inches diameter seats securely in standard keyed or keyless drill chucks.

This bit is suited for general-purpose drilling in mild steel, aluminum, cast iron, wood, and plastics. It is a practical shop-floor choice for maintenance technicians, machinists, pipefitters, plumbers, and electricians who need a reliable letter-size bit for clearance holes, pilot holes, and through-bolt applications. The Letter J size falls in the 0.2500 to 0.3000 inch diameter range and is commonly used when a specific decimal inch dimension is required that standard fractional sizes do not cover precisely.

Key Features

• Letter J size at 0.2770 inches decimal equivalent for precision hole sizing
• 118-degree standard point angle with web thinning for reduced drill walk and lower entry thrust
• High speed steel construction provides hardness and wear resistance for general-purpose drilling
• Bright uncoated finish allows visual inspection of bit condition during use
• Regular spiral flute with right-hand cut for efficient chip evacuation
• Straight-cylindrical shank at 0.2770 inches fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard keyed or keyless drill chuck accepting a straight-cylindrical shank at 0.2770 inches diameter, including handheld drills, drill presses, and milling machine setups.

Installation Notes

Secure the shank fully in the chuck and verify there is no runout before drilling. Always wear appropriate eye protection and secure the workpiece to prevent rotation. For metalwork, apply cutting fluid to extend bit life and improve hole finish. Discard or resharpen the bit if the point shows visible wear, chipping, or produces excessive heat during cutting.