Mini swivel unit with double air duct

Mini Swivel Unit SM-4: Maximum Power in Minimum Space – Including Air Feedthrough

In modern assembly automation, every millimeter counts. However, the smaller components become, the more difficult it is to supply air, for example, to the gripper. The solution? Our Mini Swivel Unit SM-4. It combines extremely compact dimensions with a USP that is unparalleled in its class: An integrated, dual air feedthrough directly through the rotating shaft.

The Space-Saving Wonder for Your Micro-Assembly

The SM series was specially developed for applications where installation space is a luxury. Despite its small size, the SM-4 offers precision and robustness usually only found in much larger units.

The USP: Why Air Feedthrough Changes Everything

Normally, hoses for grippers or vacuum suction cups must be routed externally along the swivel unit. With thousands of cycles, this leads to:

Hose breakage due to constant bending stress.
Interfering contours that limit the working space.
Unnecessary wear and maintenance.

The Wagner Solution:

With the SM-4, compressed air (or vacuum) is fed directly into the housing and routed internally through the rotating shaft upwards into the contact surface.

Your Advantages:

No co-rotating hoses: The hoses to the gripper remain stationary or move minimally.
Less space required: no cumbersome, external hose bundles.
Highest process reliability: Short connection paths and less risk of snagging lines.

Technical Highlights of the SM-4 Series

Dual Feedthrough: Control a double-acting gripper or one/two vacuum suction cups through the shaft.
Additional Axis: Ideal for use on robot arms (End-of-Arm-Tooling) to provide another rotational movement.
Adjustable Swivel Angle: As with all Wagner units, flexibly adjustable from the outside to suit your needs.

More about adjusting swivel angle 0-190°

Applications

With the SM-4 series, Friedemann Wagner GmbH offers an extremely compact swivel drive for small installation spaces. Applications can be found, for example, in electronics manufacturing, medical technology, or the watch industry. Wherever delicate components need to be precisely turned and positioned in confined spaces.

For Designers: Technical Data

Effective torque of 0.3 Nm (@6bar)
Operable at 4-8 bar
Moment of inertia 3.5 kgcm2
Repeatability of ± 0.01°
Available with or without hydraulic dampers
Hollow stop screws allow for adjustment of the swivel angle
and simultaneously save space for mounting the initiators
Orderable with or without air feedthrough

SM-4 - download 3D data here

Conclusion: Small but mighty!

The Mini Swivel Unit SM-4 proves that despite its compact design, there is no need to compromise on functionality. With the integrated air feedthrough, you rely on a clean, durable, and highly professional automation solution.