Osg 3110840 Drill Extension Collet 45mm 0.8mm

Product Description

The OSG 3110840 is a drill extension and extension collet designed to increase reach for small-diameter milling and drilling operations. With an overall length of 45mm and a reach length of 4mm, this tool is engineered for precision work in confined or deep-cavity applications. The 0.8mm mill diameter and 4.0mm shank diameter make it well-suited for tight-tolerance machining where standard-length tooling cannot access the workpiece. It is a single-ended tool featuring a 30-degree helix angle, which promotes chip evacuation and reduces cutting forces during operation. Machinists, tool-and-die specialists, and CNC operators working with small-bore or deep-feature geometries rely on extensions like this to maintain rigidity while extending effective tool reach.

This extension collet is intended for use in precision machining environments where small-diameter end mills or drill bits must reach into recessed areas, deep pockets, or features inaccessible to standard-length tooling. It is compatible with setups requiring a 4.0mm shank interface. The Series 3790 designation places this tool within OSG's lineup for small-diameter precision tooling. Typical applications include mold and die work, medical component machining, aerospace detail parts, and electronics manufacturing where fine feature dimensions are critical.

Key Features

• 45mm overall length extends effective tool reach for deep-cavity operations
• 0.8mm mill diameter supports fine-feature and small-bore machining
• 30-degree helix angle promotes chip evacuation and smooth cutting action
• 4.0mm shank diameter provides a stable interface with compatible collet systems
• Single-ended design for straightforward toolholder setup
• OSG Series 3790 precision small-diameter tooling family

Compatibility

Designed for use with collet systems and toolholders accepting a 4.0mm shank diameter. Verify collet bore size and runout tolerance specifications before installation to ensure proper fitment for precision small-diameter applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the toolholder is secured in a stable fixture before inserting or removing the extension collet. Clean the shank and collet bore thoroughly before assembly to prevent runout caused by contamination. Confirm collet torque and clamping specifications per the toolholder manufacturer's guidelines before starting a cut.