Adjustable HSS Reamer GEKO G38260 11.75–12.75 mm

Adjustable HSS Reamer GEKO G38260 11.75–12.75 mm is a precision hand tool designed for finishing and sizing drilled holes in metalworking and maintenance tasks. Manufactured from high-speed steel (HSS), the reamer provides a balance of wear resistance and cutting performance. Its adjustable cutting diameter from 11.75 mm to 12.75 mm allows controlled removal of material to reach required hole tolerances without changing tools.

Advantages

The GEKO G38260 adjustable reamer offers accurate diameter adjustment within a 1.0 mm range, enabling fine tuning of hole size for precise fits. High-speed steel construction ensures durability and a consistent cutting edge under normal workshop conditions. The tool’s design facilitates smooth cutting action and easy setting of the required diameter, reducing the need for multiple fixed-size reamers and saving storage space.

Suitable for

• Finishing and sizing drilled holes in steel and non-ferrous metals
• Machinery maintenance and on-site repair work
• Toolroom operations where accurate hole tolerance is required
• Prototyping and small-batch production with variable hole requirements

Key specifications

• Material: High-speed steel (HSS)
• Adjustable cutting diameter: 11.75–12.75 mm
• Range increment control: fine adjustment mechanism for precise sizing
• Typical application: manual reaming / hand-operated finishing
• Intended workpiece materials: steels, castings, and non-ferrous metals

How to use

Select the approximate starting diameter and clamp the reamer in an appropriate driving tool or handle designed for hand reamers. Adjust the cutting blades to the desired final diameter within the 11.75–12.75 mm range according to the measured hole size, and secure the adjustment. Align the reamer with the hole axis, apply steady rotational speed suitable for HSS and workpiece material, and use light, consistent feed with proper cutting fluid. Withdraw the reamer periodically to clear chips and check the hole diameter until the required tolerance is achieved.

Usage recommendations

Use appropriate cutting fluid for metalworking, maintain steady speed and light feed to avoid chatter, and periodically inspect the cutting edges for wear. Store the reamer in a protective sleeve or case to prevent damage to the cutting edges and to preserve measurement accuracy.