Adjustable HSS Reamer GEKO G38261, diameter 12.75–13.75 mm, metal cutting

Adjustable HSS Reamer GEKO G38261 is a high-speed steel cutting tool designed for enlarging and finishing drilled holes in metal and similar materials. The reamer offers a fine adjustable cutting diameter from 12.75 to 13.75 mm, allowing controlled material removal and precise hole tolerance management in workshop and repair environments. Its solid HSS construction provides wear resistance and stable cutting performance for repeated use.

Advantages

The adjustable design enables incremental diameter changes for accurate hole sizing without the need for multiple fixed reamers. High-speed steel construction ensures good hardness and heat resistance during cutting, extending tool life under typical workshop conditions. The tool delivers consistent surface finish and dimensional accuracy when used at recommended feeds and speeds.

Suitable for

• Finishing and sizing drilled holes in steel and non-ferrous metals
• Workshop repair and maintenance tasks requiring precise hole tolerances
• Machine shop applications where adjustable diameter control reduces tool changeovers
• Prototyping and small-batch production with varying hole size requirements

Key specifications

• Adjustable cutting diameter: 12.75–13.75 mm
• Material: solid high-speed steel (HSS)
• Intended use: metal cutting and hole finishing
• Finish quality: designed to produce accurate diameters and smooth internal surfaces
• Typical mounting: compatible with standard drill press or lathe reamer holders

How to use

Select an initial pilot hole slightly smaller than the minimum reamer diameter to allow controlled cutting. Secure the workpiece and mount the reamer in a suitable holder or chuck, ensuring concentric alignment. Operate at recommended spindle speeds and apply steady feed; use cutting fluid appropriate for the workpiece material to reduce heat and improve chip evacuation. Make light final passes to reach the adjusted target diameter and verify size with a gauge or micrometer after finishing.

Usage recommendations

Use moderate cutting speeds and consistent feed to avoid chatter and premature wear. Apply suitable cutting fluid when working with steel or other ferrous materials. Inspect the reamer for wear and sharpen or replace when surface finish or dimensional accuracy degrades.