Work-holding tombstone
120 kg | DSS series Sankyo America

The DSS series is an indexing work-holding tombstone designed to be mounted on the pallet of NC machining centers. It can perform versatile machining on five surfaces without re-chucking and ten surfaces with the twin output option. This unit uses a roller gear cam mechanism for smooth rotation and self-locking in any of the 30, 45 or 90 degree, incremental positions. Weighing 120-kg (264-lb), the rigid output fixture mounts the part securely to minimize vibration chatter during machining, grinding and finishing operations. Multiple units can be mounted on the same pallet since they are self-contained requiring no drive sources or no positioning sensors.

To index the unit, a special bar is stored in the tool holder and attached to the main spindle with your automatic tool changer. Using the NC arc interpolation program feature, the input drive cam follower can be rotated one revolution for each index from either side of the unit. Human interface is required for the initial part mounting setup only. Setup time can be reduced by up to 75%. Precise machining within ±2 arcsec accuracy can be programmed to perform reversible indexing motions. An optional hollow bore with twin output face plates have multiple predrilled mounting holes for universal fixture mounting to decrease setup and retooling times. All materials are compatible with typical machine environments regarding coolants, chips or grinding debris.