Adjustable HSS Reamer GEKO G38266 21–23 mm, 50 pieces

The Adjustable HSS Reamer GEKO G38266 21–23 mm is a set of 50 high-speed steel reamers designed to machine and finish drilled holes to precise diameters within the 21–23 mm range. Each reamer in the pack features cutting geometry suitable for sizing and improving hole roundness and surface finish in a variety of compatible materials. The adjustable design allows small diameter corrections and final sizing without switching tools, making the set practical for workshops and production environments that require repeatable hole accuracy.

Advantages

The HSS construction provides wear resistance and heat tolerance during cutting operations. Adjustable cutting blades allow controlled material removal for a precise fit and improved concentricity. Supplied as a bundle of 50 pieces, the set supports higher-volume tasks and reduces tool change downtime. The design is suitable for finishing operations after drilling to achieve consistent hole diameters and smoother surfaces.

Suitable for

• Finishing drilled holes in metal parts
• Adjusting hole diameters for press-fit or clearance fit
• Workshop maintenance and production line hole sizing
• Reworking existing holes to improve roundness and surface finish

Key specifications

• Material: high-speed steel (HSS)
• Adjustable bore range: 21–23 mm
• Pack quantity: 50 pieces
• Intended use: finishing and sizing of drilled holes
• Typical applications: metalworking and compatible materials

How to use

Secure the workpiece and ensure the drilled hole is free of chips and burrs before reaming. Select an appropriate speed and lubrication based on the workpiece material to reduce heat and extend tool life. Insert the reamer into the hole and advance with steady, even pressure, maintaining alignment with the hole axis. After reaching the desired diameter, withdraw the reamer while the tool is still rotating or following manufacturer guidance to avoid brinelling. Inspect the hole with measuring instruments and, if necessary, make small adjustments by reaming again to achieve the required fit.

Usage recommendations

Use cutting fluid when reaming steel and harder alloys to improve finish and prolong cutter life. For softer materials, reduce feed and speed to avoid chatter. Store the reamers in a dry place and clean chips from the tool after each use. Replace excessively worn reamers to maintain consistent hole tolerances.