Two-speed gearboxes
A STOBER two-speed gearbox, featuring an impressive loss-optimized direct gear and a high-precision, helical planetary gear unit.

Switch over to efficiency:
Two-speed gearboxes.

High-quality workpieces need to be manufactured and machined economically and efficiently. And this is where we come in
with our innovative PS SensorShift gear unit. Operable in two gear stages with different gear ratios.

And why is this so interesting?
It’s a high-precision, helical planetary gearbox, perfect for high torques in the transmitted gear. And at the same time, it is designed for high speeds – decoupled in a loss-optimized direct gear. Combined with digital gear shift monitoring for a smooth gear change.

BENEFITS
The energy-saving two-speed concept

STOBER two-speed gearboxes are extremely energy-efficient, which is one of their most outstanding properties.

The energy savings are primarily the result of a design that is more innovative than previous solutions on the market. The shifting process, between a gear stage with a transmitted gear and a stage with a loss-optimized direct gear, lets you reach high speeds or high torques within an extremely short time. What is outstanding is that gear shifts are digitally monitored.

The temperature of the gear unit also remains constantly low, even when there are frequent gear shifts or maximum speed loads.

PS gear units are ideal for all machine tools that need sophisticated drive concepts for main feeds: gantry machines, vertical and horizontal lathes, or milling and drilling centers.

High speeds and high torques

The transmitted hear of the PS series works with a proven helical STOBER planetary gear unit. The various gear ratios in this gear stage deliver high torques and are perfect for machining hard materials. In this precision design, the helical gearing is what also guarantees highly smooth operation.

In direct gear, however, the planetary set is completely decoupled. In this design, the engine torque is transmitted almost without loss – as if there were no gear unit in between. They let you reach high speeds quickly for tasks such as fine machining workpieces, for example. Energy losses are almost completely eliminated, while the dynamics increase significantly.

Clever shifting with SensorShift

Get the benefit of a very unique concept: STOBER SensorShift – a special digital gear shift control developed for shifting between the two stages.

The critical moment in shifting is when the gears mesh together just after the planetary gear is activated in the transmitted gear. SensorShift detects this moment in advance and briefly reduces the velocity. This reduces the shifting error rate to less than 0.01%!

The gentle acceleration and deceleration ramps also protect the mechanics while increasing the service life.

By the way, SensorShift has a completely non-contact design and is therefore free of wear. The number of gear switches is counted and stored. Another plus: The split-second teach-in function makes mechanical setting, as for limit switches, absolutely unnecessary.

TECHNICAL DATA
PS SERIES
Power density:
Price category:
  • Total ratio: 1 – 5.5
  • Permissible input speed: 2500 – 10000 rpm
  • Nominal power: 39 – 47 kW
  • Maximum torque S3 operation: 400 – 2200 Nm

Find your right fit!
FEATURES
PS SERIES
  • Shaft: Flanged shaft, solid shaft without or with two feather keys
  • Housing:
    • Gear unit and shift housing made from one mold
    • Short, medium or long bearing distance, all with an option for a cooling flange
  • Bearing:
    • Standard (deep-groove ball bearing)
    • Axially or radially reinforced (angular contact ball bearings or cylindrical roller bearings)
  • Mounting position: Any
  • Lubricants and maintenance:
    • Splash lubrication for standard applications in a closed housing
    • Circulating lubrication with an external tank
  • Two-speed switching:
    • Transmitted gear: High-precision, helical planetary gear unit with the ratios i = 1 or i = 5.5
    • Direct gear: Gear ratio i = 1; the planetary set is completely decoupled
    • Optional neutral gear position
  • Recommended motors: Can be attached to all common synchronous servo motors for screw drives

APPLICATIONS
Portal milling
Industries and Applications

We get your visions moving – in various industries and markets worldwide.

Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.

Learn more
Horizontal machining units
Industries and Applications

We get your visions moving – in various industries and markets worldwide.

Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.

Learn more
Milling
Industries and Applications

We get your visions moving – in various industries and markets worldwide.

Using a holistic approach for your specific task, we support you with precisely tailored solutions for drives and automation.

Learn more
DOCUMENTS
TitleVersionIDDateLanguageSize / Type
Catalog PS Two-speed gearbox 084427122019 09EN5.19 MB [PDF]
Catalog STOBER compact 034426552021 06EN8.33 MB [PDF]
TitleVersionIDDateLanguageSize / Type
Operating instructions Two-speed gearbox 124426392019 09EN1.65 MB [PDF]
Safety instructions for explosion-proof gear units 004431082018 07EN63.74 KB [PDF]
TitleVersionIDDateLanguageSize / Type
Lubricant fill volume 16441871EN1.22 MB [PDF]
TitleVersionIDDateLanguageSize / Type
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Do you need competent help with replacement parts, replacement drives, repairs and retrofitting? Feel free to contact us! We also offer a 24-hour hotline for urgent cases.

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AT home in the world of demanding motion.

Need special solutions?

Our product portfolio is modular and freely scalable, offering a very wide range of combination options. A drive system for custom-fit, compact machine concepts. With the option to make adjustments to fit the project.

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