Drill bit Proline 91040 — metal, 10 mm diameter, 400 mm length, 1 pc

Proline 91040 is a single metalworking drill bit with a 10 mm cutting diameter and a total length of 400 mm. Designed for drilling metal, this solid bit is intended for tasks that require extended reach and the ability to create deep holes in steel and other ferrous materials. It fits standard chucks compatible with its shank and should be run at speeds and feeds appropriate for metalworking operations.

Advantages

The drill bit features a specially shaped solid carbide insert that improves durability and wear resistance during prolonged use. Its geometry supports accurate centered drilling and reduced radial load on the workpiece, while a double-twist flute design facilitates efficient chip evacuation and quicker bore clearing. The long 400 mm length provides extended reach for deep or hard-to-access holes.

Suitable for

• Drilling deep holes in steel and other ferrous metals
• Maintenance and repair work requiring extended-reach drilling
• Fabrication and metalworking shop tasks
• Situations where accurate, centered holes are needed at depth

Key specifications

• Cutting diameter: 10 mm
• Total length: 400 mm
• Material: metalworking drill with solid carbide cutting geometry
• Flute type: double twist for chip evacuation
• Packaging: single piece

How to use

Secure the Proline 91040 drill bit in a compatible chuck or collet, ensuring proper alignment and firm clamping. Select cutting speed and feed appropriate for the workpiece material and drill diameter; use cutting fluid or coolant when drilling steel to reduce heat and prolong tool life. Begin drilling at a low speed to establish the hole, then increase speed as appropriate while applying steady, even pressure. Withdraw periodically to clear chips from the flutes and maintain chip flow during deep-hole drilling.

Usage recommendations

Use a drill press or stable machine setup for best accuracy when drilling deep holes. Employ suitable cutting fluid and adjust speeds to the metal type to maximize tool life. Inspect the carbide cutting edge before use and replace the bit if excessive wear or chipping is present.