Sandvik Coromant 5729940 Capto Weldon Shank Adapter

Product Description

The SANDVIK COROMANT 5729940 is a Capto to Weldon straight shank adapter designed to interface a C6 outside modular Capto connection with a Weldon-style straight shank toolholder. It provides a 59.99 mm projection and a 3/8 inch hole diameter, making it a precision coupling component for CNC machining centers and milling applications. The 16.70 mm nose diameter and through-coolant capability allow coolant to be directed directly to the cutting zone, supporting tool life and chip evacuation in demanding operations. This adapter is installed by machinists and tooling technicians in production and job-shop environments.

This adapter is used in CNC milling, boring, and multi-axis machining setups where a Capto C6 spindle interface must be paired with a Weldon straight shank cutting tool. It is suited for both roughing and finishing operations that require stable, repeatable toolholder connections. The through-coolant feature makes it appropriate for deep-pocket milling, drilling, and other operations where flood coolant alone is insufficient. It fits into tooling assemblies on machining centers equipped with C6 Capto-compatible spindles.

Key Features

• C6 outside modular Capto connection for secure, repeatable spindle interface
• 3/8 inch hole diameter accepts standard Weldon straight shank tooling
• 59.99 mm projection provides clearance for a range of workpiece geometries
• 16.70 mm nose diameter for precise tool alignment and minimal runout
• Through-coolant design channels coolant directly to the cutting edge
• 97.99 mm overall length suitable for standard CNC toolholder assemblies

Compatibility

Designed as an OEM-style modular adapter for CNC machining centers equipped with a C6 Capto outside modular connection accepting Weldon straight shank toolholders.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the spindle fully powered down and locked out per facility lockout/tagout procedures. Mating Capto surfaces should be cleaned and inspected for damage before assembly, as contamination or nicks on the taper will affect clamping accuracy. Torque the clamping mechanism according to the machine manufacturer specifications for the C6 interface. Verify through-coolant passages are clear and properly sealed before returning the spindle to service.