Indexing units NTZ-31, 5-spindles

Based on the proven numerical indexing units type NTZ, we manufacture special indexing units especially for your application. In the indexing unit depicted below, 5 spindles have been integrated into a housing.

The spindles at the front are on spindle bearings, and on a grooved ball bearing at the back. Located between the bearings are the drive gear and the clamping system. This clamping system is hydraulically actuated and prevents distortion of the spindles if the automatic controller is switched off. Via an intermediate gearwheel respectively, the spindles are connected to each other and to the drive motor. The position of the individual spindles relative to each other is fixed ex works via a Spieth bushing.

The drive motor (Harmonic Drive) has a gear reduction of 1:100 and an integrated incremental encoder. It drives the first spindle via an intermediate wheel and thus all further spindles. The indexing and repeat accuracy is determined by the gearwheels and the play. The gear transmission ratio is chosen in such a way to eliminate offset via several spindle revolutions. The repeatability is thus very high. The incremental encoder of the drive motor has a zero mark as a reference point. Because of the gear reduction, selection of the right zero mark is enabled by an additionally integrated contactless limiter switch, actuated once per spindle revolution. The spindles of the indexing unit are manufactured in special design, and the indexing unit has no collet clamping. The clamping system for spindle-clamping only has one hydraulic connection, so that all spindles are always clamped simultaneously.

We manufacture for you:

  • single- and multi-spindle indexing units
  • spindle distance 75 mm
  • indexing via gears
  • special spindles
  • with or without spindle clamping
  • Harmonic Drive
  • indexing speed max. 40 rpm

Please don’t hesitate to contact us. We will be glad to provide tailormade clamping devices for your requirements.