Guhring 9055110115100 Jobber Drill Bit 29/64 Carbide

Product Description

The GUHRING 9055110115100 is a jobber-length, solid carbide twist drill bit designed for high-performance hole-making in cast iron and steel. It carries a FIREX coating for extended tool life and reduced heat buildup under demanding cutting conditions. The 140-degree split point (SU type) geometry is web-thinned with a tapered web configuration, enabling self-centering entry without a center punch. Overall length is 4.646 inches with a flute length of 2.795 inches. The straight-cylindrical shank measures 0.472 inches in diameter. Built to DIN 6537L and DIN 6535 standards, this bit suits production and maintenance environments where tool consistency and hole accuracy are required.

This drill bit is intended for use in metal-cutting applications involving cast iron and steel workpieces, classified under material grade DK460UF carbide. Its 5xD flute-to-diameter ratio makes it well-suited for moderately deep holes up to a maximum drilling depth of 2.120 inches. Coolant-through capability allows internal coolant delivery, which is particularly useful in CNC machining centers and gang-drill setups where external coolant access is limited. Series 5511 positions this tool within a dedicated line of carbide jobber drills for professional machining operations.

Key Features

• Solid carbide construction with FIREX coating for heat and wear resistance
• 140-degree SU point with web thinning for self-centering entry
• Coolant-through design supports internal coolant delivery on compatible spindles
• Right-hand cut, regular spiral flute with 2-flute configuration
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Meets DIN 6537L and DIN 6535 dimensional standards

Compatibility

Designed for use in cast iron and steel workpieces (material codes K and P). Compatible with machine spindles and toolholders that accept a 12.00 mm straight-cylindrical shank. Coolant-through function requires a coolant-through compatible spindle or toolholder.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Secure the shank fully in a collet, drill chuck, or hydraulic holder rated for the shank diameter before engaging the spindle. Verify spindle RPM and feed rate are appropriate for the workpiece material and bit diameter before cutting. Do not exceed the maximum drilling depth of 2.120 inches without retracting to clear chips.