Drill chuck extension Proxxon 27028 — accessory for attaching small drill chucks

Proxxon 27028 is a drill chuck extension designed as an accessory for attaching and extending small drill chucks on compatible compact rotary and bench tools. It increases working reach and provides a secure mount for small-diameter drills up to 5.0 mm, enabling precise drilling operations in model making, electronics, and other light workshop tasks. The extension is inserted in place of the rotating back centre and transmits feed movement via sliding of the complete tailstock, preserving alignment and control during delicate operations.

Advantages

The extension supports chucks that clamp drills up to 5.0 mm, offering additional reach without compromising stability. It is compatible with Proxxon and similar compact tool systems and installs by replacing the rotating back centre, which keeps the tool's original tailstock feed mechanism functional. The design focuses on precision mounting and straightforward mechanical interaction with existing tailstock slides to maintain concentricity and repeatable positioning.

Suitable for

• Model making and miniature construction
• PCB and electronics drilling
• Jewellery and watch repair where small-diameter drills are required
• Hobby and light workshop drilling tasks requiring extended reach

Key specifications

• Maximum clamping capacity: 5.0 mm
• Type: drill chuck extension for small chucks
• Mounting method: inserted in place of the rotating back centre
• Feed transmission: via sliding of the complete tailstock
• Compatibility: designed for Proxxon compact tool systems and similar small rotary/bench tools

How to use

Remove the rotating back centre from the tailstock and insert the drill chuck extension into the same position. Secure a compatible small drill chuck in the extension and tighten it to clamp drill bits up to 5.0 mm. Use the tool's existing tailstock slide/feed movement to advance the chuck and bit for controlled, precise drilling. Ensure the chuck and extension are properly seated and tightened before starting the machine, and verify concentricity by running at low speed initially.

Usage recommendations

For best results, use small, sharp drill bits designed for the material being worked. Operate the tool at appropriate speeds for the bit diameter and material, and apply gentle, consistent feed via the tailstock slide to avoid bending small drills. Regularly check and retighten the chuck and extension mounting to maintain alignment during extended sessions.