Drill bit Proline 72572 — 25 mm diameter, 720 mm length, single piece

Proline drill bit model 72572 is a single-piece metal-working bit with a 25 mm diameter and a total length of 720 mm. It is designed for drilling large holes in metal and similar hard materials where extended reach is required. Supplied as one piece, this drill bit is intended for use with compatible industrial and professional drills and holders that accept long, heavy-duty bits.

Advantages

The drill bit combines a long 720 mm length with a 25 mm cutting diameter to enable deep and large-diameter holes without frequent repositioning. Its single-piece construction provides rigidity and stability during drilling, while the geometry of the cutting edges and flute design supports efficient chip removal and consistent hole quality. The bit is suitable for workshop and industrial environments where precision and durability are needed.

Suitable for

• Drilling large-diameter holes in metal plates and structural steel
• Long-reach drilling in assemblies and machinery where standard-length bits are insufficient
• Workshop and industrial maintenance tasks that require deep, straight bores
• Use with compatible professional drills and holders designed for long bits

Key specifications

• Cutting diameter: 25 mm
• Total length: 720 mm
• Single-piece metal-working construction
• Designed for heavy-duty and long-reach metal drilling

How to use

Mount the Proline 72572 drill bit securely in a compatible drill chuck or holder rated for long, heavy bits. Ensure the drilling machine is fixed or supported to minimize runout and vibration. Align the bit with the marked drilling point and start at low speed to establish a centered pilot contact, then increase speed and feed steadily according to the material and machine specifications. Use appropriate cutting fluid or coolant for metal drilling to reduce heat and extend tool life. Periodically withdraw the bit to clear chips if the drilling depth and flute design require manual chip removal.

Usage recommendations

Use the drill bit with drills and holders specified for extended-length bits, apply appropriate cutting fluid when drilling metal, and ensure the workpiece and machine are securely clamped to maintain straight, accurate holes and to reduce the risk of bit breakage.