Proxxon 28 622 — Proxxon precision tool (model 28 622)

Proxxon 28 622 is a precision flex-shaft tool designed for detailed mechanical and hobby work. It combines a dual ball-bearing milled steel shaft and a tool holder compatible with MICROMOT steel collets to deliver accurate rotation and stable tool seating. The flexible core remains cool when working on tight radii, and the tool features a ball-bearinged shaft end on the machine for smooth, concentric performance. A quick-action chuck covers 0.3 to 3.2 mm tool shanks and the 100 cm length provides reach for bench or handheld applications, supporting speeds up to 25,000 rpm.

Advantages

The dual ball-bearing milled steel shaft provides reduced run-out and extended service life compared with non-bearing designs. Compatibility with MICROMOT steel collets and a 0.3–3.2 mm quick-action chuck makes it practical for rapid changes between different shaft diameters. The highly flexible, non-heating core allows precise work on curves and confined areas without loss of control. Ball-bearing support at the machine end ensures smooth rotation at high speeds up to 25,000 rpm.

Suitable for

• Model making and fine detail sanding or carving
• Small-part finishing, deburring and polishing
• Precision drilling and reaming on delicate components
• Repair work and adjustments in workshops or home projects

Key specifications

• Flexible shaft length: 100 cm
• Maximum rotational speed: 25,000 rpm
• Quick-action chuck capacity: 0.3–3.2 mm
• Dual ball-bearing milled steel shaft for reduced run-out
• Tool holder compatible with MICROMOT steel collets
• Ball-bearinged shaft end on machine for smooth concentric rotation
• Highly flexible core that remains cool under tight-radius operation

How to use

Secure the shaft's tool holder to the compatible machine end and ensure the ball-bearinged shaft end is correctly seated in the machine. Select a cutter or accessory with a shank diameter between 0.3 and 3.2 mm and insert it into the quick-action chuck, tightening according to the chuck's instructions. Operate the drive unit within the recommended speed range, up to 25,000 rpm, and guide the flexible shaft gently to maintain control. For tasks requiring fine control, support the workpiece and use light pressure to avoid overloading the shaft or accessory.

Usage recommendations

Inspect collets and chuck before each use, clean debris from the shaft and collets, and periodically lubricate bearings according to the drive unit manufacturer's guidance. Use appropriate accessories rated for the stated speed and avoid side-loading rotary tools to prolong service life.