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By comparison: 1.5 t - that is the weight of a small hippo, two adult dairy cows or a compact SUV. Formidable heavyweights: For the RS-50A, however, it’s a cinch. The small rotary indexer is capable of supporting axial loads of up to 1,500 kg – which translates to 3,300 % of its own weight of 45 kg. A feat of magnanimous proportions. And the secret behind this enormous load capacity? Cycloidal gears!

The RS-50A rotary indexer at a glance:

• Maximum axial load: 1,500 kg
• Rated torque: 490 Nm
• Acceleration and braking moment: 1,225 Nm
• 180° rotation within 0.7 s at an inertia of 10 kg m²
• Repeatability: ±5 arcsec
• Positioning accuracy: 60 arcsec
• Hysteresis loss < 1.5 arcmin
• Shock resistance: up to 500 % of the rated torque
• Hollow shaft: Diameter of 50 mm
• Height: 136 mm (with motor flange: 158 mm)

Rotary indexers with high load capacity for precise positioning

Cycloidal gears are specialists for high loads and jobs that require precise positioning – and they are the key components of our rotary indexers. Their special engineering allows these gear systems to transfer exceedingly high amounts of torque with ultimate precision and smooth operation – and with an ultra compact design. Power transmission by means of cams and rollers ensures virtually full contact and even distribution of forces within the gearbox, which produces high rigidity. The large integrated angular ball bearings absorb both axial and radial loads and bending moments, and also provide for high moment rigidity and resistance to impacts and overloading (up to 500 % of the rated torque). What is more, aside from reducing vibrations and inertia, the two-stage reduction principle allows for larger reduction ratios.

Large hollow shaft, large main bearing

The rotary indexers of the RS series furthermore boast a large hollow shaft. This makes it possible to incorporate a particularly large main bearing – a clear advantage that boosts load capacity. This feature is particularly ideal for applications that impose steep requirements on allowable moment and moment rigidity. Better yet, the hollow middle axis provides ample room for the space-saving storage of cables and hoses. The cast iron base allows for easy mounting on the floor and provides for high stability.

Six reasons for the high load capacity of our rotary indexers:

• Power transmission by means of cams and rollers
• Full contact and even distribution of forces within the gearbox
• Large integrated angular ball bearings for absorbing high bending moments
• Low inertia 

• Insensitive to vibrations 

• Sturdy, robust construction

Axial loads up to 9 t

The RS-50A is the smallest member of our RS series. All in all, the product family for rotary positioning applications comprises five sizes – all of them are true powerhouses, delivering exceptionally high load capacity. The largest member of the product family is the RS-900A, offering a load capacity of 9 t, which equals the weight of a city bus, a crawler excavator or a small loaded truck.

Your quintet for power and precision:

• RS-50A: Axial loads up to 1.5 t
• RS-260A: Axial loads up to 2.5 t
• RS-320A: Axial loads up to 5 t
• RS-400A. Axial loads up 7 t
• RS-900A: Axial loads up to 9 t

Multi-faceted tools for rotary positioning applications

Rotary indexers (also known as rotary tables or turntables) enable short switching and cycle times in virtually every industry – from automotive to machine and plant engineering and from battery production for electric cars to food production. The high load capacity even makes the handling of heavy loads reliable and safe. Rotary indexers are often integrated as components in positioners. If the application does not require a swivel axis, they are also used separately.

Fields of application (for example):

• Welding positioners
• Machining centres
• Milling machines
• Lathes
• Cutting machines
• Grinders
• Paint lines
• Transfer machines
• Automatic assembly machines
• Packaging machines
• Measuring machines
• Filling lines
• Handling systems

Load capacity in extra large

Our cycloidal gears are genuine high performers and always cut a striking figure - and not only as part of rotary indexers. Whether in robotics or mechanical engineering: Wherever exact positioning and absolute reliability are required, the high-performance drive systems are the first choice. Are you already familiar with our superlatives? RV-2800N: the world’s largest precision gearbox. Neco^®HT-900: the world’s largest plug-and-play precision gear. These gear giants let you master any challenge you throw at them.

Would you like to learn more about the load capacity of our rotary indexers and cycloidal gears, or do you have questions relating to a specific project? Do not hesitate to contact our experts.