A single high-accuracy tool holder for milling, drilling, reaming, or tapping boosts efficiencies while holding near-perfect runoutNew universal, high-precision chuck.

Manufacturers of high-precision components (aerospace, transportation, die and mold, general engineering, and many more) wage a constant battle between producing high-tolerance parts and a ‘we-have-to-have-it-tomorrow’ reality.

WIDIA has recently announced a significant new weapon to bring shops closer to victory, a universal, high-precision collet chuck offering use in multiple applications (milling, drilling, reaming, and tapping), while maintaining runout accuracies of 0.003 mm (0.0001 inches) at 3xD.

Shops looking to upgrade performance and final part tolerance will welcome this chuck’s features:

• Added versatility — the ability to continue using standard ER collets while upgrading to precision collets
• Thicker chuck walls and a stronger outer form for added rigidity and lower vibration for longer spindle and tool life
• Unique sealed-by-design precision collets (6 – 20 mm or 0.24 – 0.79 inches) for excellent coolant delivery and longer tool life
• Better and repeatable balancing, all contributing to higher accuracy

Aerospace, die/mold and many other industries regularly encounter high-strength, difficult-to-machine materials requiring high torques, feeds, and forces. The danger of milling cutters being pulled out of the tool holder at these extreme forces has significantly increased. This is at least true for tool holders that offer precision clamping with good concentricity such as shrink-fit. Such toolholders work with frictional locking, but their clamping force is often not sufficient for roughing.

In response, the new WIDIA universal precision collet is available with Safe-Lock pull-out protection from Haimer. Helical grooves are ground into the shank of the milling tool that, together with the respective pin drivers in the chuck, prevent the tool from spinning or being pulled out of the holder altogether under extreme machining conditions. The helical path of the Safe-Lock grooves also allows for adjusting tool length, meaning tools can be reground and pre-set as usual.

SCHUNK, the competence leader for clamping technology and gripping systems extends its modular system for efficient workpiece clamping with a particularly smart collet chuck module for parts with cylindrical shanks. Lengths of pipes, shafts, and other small parts can be precisely clamped with the SCHUNK VERO-S SEZ within a very short time, and can be machined from five sides with an optimal accessibility. The same applies for unstable workpieces with a short shank.

Since the system can be quickly made ready for use, it is particularly suitable for machining individual pieces, small series such as plungers and ejectors in tool and mold making. First of all, the comparably light but robust collet chuck module is put onto an existing SCHUNK VERO-S quick-change module, is equipped with a workpiece, and then the pull-down jaw system is activated. This ensures a maximum clamping precision, great dimensional stability, and an adjustable depth stop provides for a great repeat accuracy. Coolant is discharged through an integrated drain. Since the system can be used together with all common ER collet chucks, it provides a maximum degree of flexibility to the users. The SCHUNK VERO-S SEZ collet chuck modules are available for SCHUNK VERO-S NSE plus 138-V1 (ER 32-120 and ER 40-120), and VERO-S NSE mini 90-V1 (ER 25-100) quick-change pallet modules. The clamping diameter amounts from 2 to 20 mm (ER 32-120), 3 to 26 mm (ER 40-120), or 1 to 16 mm (ER 25-100). The maximum clamping depths is 96 mm (VERO-S SEZ), or 85 mm (VERO-S SEZ mini).