What is an indexer?

Indexer convert a uniform rotary motion into an intermittent output motion. In other words, the constant rotation of the input shaft is converted into a clocking step movement. This is used, for example, in automatic assembly machines in order to index a product precisely through several assembly steps.
This is also the reason why these cam gears are often called step gears / indexers.

Application for indexer - advantages:

  • High step frequency, possible are up to 2000 cycles per min.
  • Gentle starting and braking due to positively controlled movement through the cam.
  • Positive positioning, no additional positioning unit required.
  • Constant movement time, the overlapping of movement processes is possible without loss of time.
  • Very high reliability; runs for several years without interference.
  • Indexers are working in both directions and therefore can be used reversing.
  • A very exact accuracy is reached as all indexers are free of backlash.

Typical applications for indexer have high requirements for exact and repetitive step movements, e.g. with packaging machines, automatic assembly machines, press automation and handling devices.


The following video shows our exhibits, which give a rough overview of the possible uses.

If you have any questions, we are of course happy to help:
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