Keyless drill chuck Proxxon 28941, capacity 0.3–3.2 mm, model 28 941

Proxxon 28941 keyless drill chuck provides a compact, tool-free solution for holding small-diameter drill bits and accessories. Designed for quick accessory changes, this chuck accepts shanks from 0.3 mm up to 3.2 mm (approximately 1/32" to 1/8") and is compatible with precision rotary tools and small bench machines that accept an M8 x 0.75 mm threaded mount. It is intended for fine drilling, model making, electronics work and light workshop tasks where rapid bit replacement and accurate concentric holding are required.

Advantages

The keyless design allows rapid tightening and release of bits without a key, reducing changeover time and simplifying operation during repetitive tasks. Its compact construction maintains access to tight work areas and supports consistent gripping of small shank tools. The threaded mount provides straightforward compatibility with a range of Proxxon rotary tools and accessories that use the same thread standard. A manufacturer warranty covers normal use for added user assurance.

Suitable for

• Fine drilling in model making and miniatures
• Electronics PCB drilling and component work
• Precision hobby and craft applications requiring small bits
• Light workshop tasks with rotary tools that accept the M8 x 0.75 mm thread

Key specifications

• Capacity: accepts shanks from 0.3 mm to 3.2 mm (approx. 1/32"–1/8")
• Mount thread: M8 x 0.75 mm
• Keyless tightening mechanism for hand operation
• Compact form factor suitable for tight working spaces
• Designed for precision and small-diameter accessories

How to use

To install, screw the chuck onto a compatible tool spindle that uses the M8 x 0.75 mm thread until it is secure. Open the jaws by rotating the outer sleeve, insert a properly sized bit (0.3–3.2 mm), then close the jaws by hand-twisting the sleeve until the bit is firmly gripped. Ensure the bit is seated straight and tightened sufficiently for the intended speed and workload before operation. For removal, open the sleeve by hand and withdraw the bit once the jaws are loosened.

Usage recommendations

Use only bits within the specified diameter range and avoid overtightening by hand to prevent damage to the chuck or accessory shank. Verify compatibility with your specific Proxxon tool model before fitting; this chuck is compatible with a range of precision rotary tools and micro mills that accept the M8 x 0.75 mm thread but will not fit tools or accessories using other thread types or different mounting standards. Regularly inspect the jaws for wear and keep the mount threads clean to ensure reliable operation.