Kurt
Kurt Self-Centering Vises improve machining centre productivity by positioning and clamping workpieces precisely and quickly on a defined symmetrical axis.

Available in two sizes, these Kurt Self-Centering Vises can be used in any mounting position and provide a large clamping range for odd-sized workpieces. For maximum productivity, they quickly and easily align in a series on a machine worktable.

Centering accuracy for these vises from minimum to maximum opening is .0006 inch with .0002 inch repeatability. Both moveable jaws are designed with the famous Anglock. This is the unique pull-type jaw clamping design that minimizes jaw deflection.

Kurt Self-Centering vises feature durable 80,000 PSI ductile iron bodies with precision machined steel components. This is important to machinists who want rugged strength, extra part holding rigidity, and long-term accuracy while absorbing machining vibration.

Additional features include: hardened jaws, hardened bed ways, chip guards, lip seals on main screw, and optional InnerLock jaw plates to further minimize setup time.

The two Kurt Self-Centering Vise models are: a four inch jaw width (Model SCD430) and a six inch jaw width (Model SCD640). Jaw opening on the four inch model is 6.25 inches and 8.00 inches on the six inch model. Both are backed by Kurt’s exclusive lifetime “Iron Clad”™ warranty for workmanship and materials.
“Kurt Self-Centering Vises are another effective workholding option for expanding the productivity of existing machining centers,” reports Steve Kane, Kurt’s global sales and marketing manager. “These vises provide major process upgrade opportunities at very modest cost.”
Kurt Manufacturing Co.

Emuge
Emuge’s workholding division specializes in providing accurate, almost maintenance-free customized solutions for applications from low volume job shops to high volume automotive production environments. Emuge is the exclusive North American agent for Germany’s The Hohenstein Co. that designs and productes workpiece clamping fixtures.

“Our workholding group stays close to our customers to learn about their unique challenges and production environments. Doing so helps us develop the best solutions for their applications,” says David Jones, precision workholding manager at Emuge Corp. Among the company’s precision workholding lineup is:

Emuge’s System SG. With its expanding-bush design, it’s used in many machining operations such as hobbing, shaping, and shaving for gear production, as well as milling and inspection. A large surface area contact with the workpiece provides a clamping solution that is rigid, accurate and repeatable.

The high precision System SP is used to clamp workpieces and tools. By applying an axial force, the clamping sleeves move in the direction of the force and expand radially. This eliminates the clearance between clamping sleeve and body, and between clamping sleeve and workpiece. System SP achieves concentricity of < 0.002 mm (corresponding to < 0.0001 in.).

System SH is the solution if there is not enough room for a mechanical clamping system and for clamping long, thin-walled workpieces or a number of similar workpieces. System SH is a closed system that uses hydraulic pressure to clamp the workpieces.

For workpieces that have a short clamping base or for diameters with a very large tolerance, System SZ is the best choice. By applying an axial force, a slitted collet is radially expanded by a cone. Simultaneously an axial movement occurs, clamping the workpiece.

When the eccentricity between pitch circle and seating bore is small, diaphragm clamping System SM is ideal. It allows clamping of the gear wheel at the pitch circle for machining the seating bore. The gear wheel is clamped in both axial and radial directions.
Emuge Corp.

Schunk
Schunk has introduced a new line of rotational workholding, Rota NCK-plus, and a new line of stationary workholding, Vero-S module.

The Rota NCK-plus features a large through hole, an improved lubrication system, and high clamping repeatability. It is a direct replacement of nearly all OEM chucks. With tapered clearance designed into the chuck body, additional tooling clearance, as well as increased spindle bearing life due to lighter weight, can be realized.

The long precision piston guide and support guarantee less wear, a high level of continuous clamping accuracy, and long life. This power chuck represents the best alternative as a replacement lathe chuck. The jaw interfaces are 1.5 mm x 60° and 1/16 x 90° offering the user a high flexibility with regards to the use of existing top jaws.

The Rota NCK-plus is available for all CNC lathes in the sizes 165 (6 in.), 210 (8 in.), 250 (10 in.), and 315 (12 in.), with clamping forces from 57 kN (12.814 lbf) to 144 kN (32.392 lbf). It is suitable for maximum speeds of 6,000 rpm and combines jaw strokes ranging from 2.75 (0.108 in.) – 5.30 mm (0.208 in.) per jaw.

All functional components of the new module are made of hardened stainless steel. Among the many benefits, the pull-in force of the new module is up to 9,000 lb. With the Vero-S, machine set-up times can be reduced by up to 90 per cent.

Thanks to the patented dual clamping stroke and the integrated turbo function, the retention force increases to 9,000 lb (4,000 kg). This is 30 per cent higher than Schunk’s previous model. The rigidity of the clamping system benefits from this higher force. As a result, considerably higher cutting forces are possible.

Even extremely high shear forces can be absorbed reliably. Locking of the new quick-change pallet system is done mechanically via a large spring package. It is self-locking and clamps with a form-fit. Holding forces of up to 16,800 lbs are achieved. For opening the module, a pneumatic pressure of 6 bars (85 psi) is sufficient.

Vero-S clamps workpieces, pallets, clamping stations, existing fixtures, and tombstones with one or more clamping pins. The radial aligned clamping slides of the quick-change pallet system pulls in the clamping pin and locks it. Exact positioning is accomplished via a short taper. Radial location is done via a diamond pin. This assures a repeat accuracy of less than 5 microns (0.0002 in.).

The new Vero-S is completely compatible and interchangeable with Schunk’s previous pallet system and the clamping pins work universally across the new line. Workpieces can be transferred from machine to machine or to a CMM accurately and seamlessly on the fly.

Hardened Stainless Steel is used for all the functional components of the Vero-S, such as base body, clamping pin, and clamping slide. This increases the module’s life, reliability, and reduces maintenance.
SCHUNK Intec Corp.