Drill bit Proline 91640 — metal 16 mm diameter, length 400 mm, 1 pc

Single Proline 91640 metal drill bit with a 16 mm diameter and 400 mm overall length, supplied as one piece. Designed primarily for drilling metal, this solid bit is intended for deep or through holes in steel and other ferrous materials. It fits standard drill chucks or holders appropriate for its shank and is suitable for professional metalworking, maintenance, and construction tasks.

Advantages

The solid construction and hardened cutting geometry provide consistent performance when drilling ferrous metals. A design focused on centered drilling reduces wandering and enhances hole accuracy. The length of the bit allows drilling of deep or through holes without changing extensions, and compatibility with typical chucks ensures straightforward installation and removal.

Suitable for

• Drilling deep or through holes in steel and other ferrous materials
• General metalworking and fabrication tasks
• Maintenance and repair operations requiring precise hole placement
• Construction jobs where metal components need joining or passage holes

Key specifications

• Diameter: 16 mm
• Overall length: 400 mm
• Quantity: 1 piece
• Material application: metal / ferrous materials
• Design: solid one-piece drill bit for deep drilling

How to use

Select a drill or holder compatible with the bit's shank and secure the bit firmly in the chuck. Mark the drilling point and, if needed, use a center punch to prevent walking on sheet or plate surfaces. Start drilling at a low speed to establish the cut, then increase speed and apply steady axial pressure appropriate for the material being drilled. Use cutting fluid or coolant when working with steel to reduce heat and extend tool life. After completing the hole, retract the bit while the spindle is rotating slowly to help clear swarf.

Usage recommendations

For best results when drilling steel and other ferrous metals, use appropriate cutting fluid, maintain stable clamping of the workpiece, and match drill speed to material thickness and hardness. Inspect the bit for wear before each use and replace if cutting performance degrades or if the tip is damaged.