Masterpiece in the World #28
Two innovative manual chucks achieve one-touch jaw change
and lightweight body for higher versatility

Usually, it takes at least a few minutes to manually change chuck jaws as it involves some tasks such as tightening of jaw fixing bolts. So, manual jaw change can cause a decrease in machine operating rates especially when machining requires frequent setup changes, for example, prototyping or large-variety small-lot production. In other words, machine operating rates can be increased if such setup change can be streamlined.
A milling machine with the turn function has limitations on table loading weight. So, if the machine employs a heavy chuck, a workpiece must be less than the maximum loading weight, taking the chuck weight into account. This means that if a lighter chuck is used, heavier workpieces can be machined, allowing users to make the most of their machines’ capability.
Streamlined jaw replacements and reduced chuck weight for maximum machine performance – these two challenges were achieved by innovative manual chucks from SCHUNK: the ROTA-S plus 2.0 and ROTA-S flex.

ROTA-S plus 2.0
Powerful clamping and quick jaw change in approx. 5 seconds

The most distinctive feature of the ROTA-S plus 2.0 is its quick jaw change capability. All three jaws can be easily detached just by pressing the release buttons and can be attached just by inserting them into the grooves. With the ROTA-S plus 2.0, jaw replacement can be completed in as short as 5 seconds, which is much faster than bolt-fixed jaws that take 5 to 10 minutes to replace.
Despite its simple attachment/detachment mechanism, the ROTA-S plus 2.0 provides much greater clamping force than conventional models. It also employs an excellent lubrication system to ensures constant and stable clamping forces. Additionally, thanks to the serrated grooves on the base jaw – one of the distinctive features of SCHUNK chucks – the ROTA-S plus 2.0 can make a surface contact, which allows for higher clamping force and accuracy than a scroll chuck that makes a point contact. The ROTA-S plus 2.0 is compatible with various types of jaws to handle a wide variety of workpieces.

ROTA-S plus 2.0
Wider machining space and high expandability & durability

The ROTA-S plus 2.0 was designed with a lower height than conventional models (e.g. 83.5 mm for ROTA-S plus 2.0 160/K). This enables users to use larger machining space and longer cutting tools, and thus maximize the performance of their machine tools. High expandability is another feature of the ROTA-S plus 2.0. Expansion arbors are available in four sizes.
The ROTA-S plus 2.0 achieves highly accurate clamping on the fixture even if a clamping diameter (I.D.) is small. As an arbor can be attached to the chuck with screws, it can be ready in one to two minutes. It also offers easy maintenance and superior durability.

ROTA-S flex
Lightweight design to maximize machine’s potential

The ROTA-S flex was designed based on the ROTA-S plus 2.0. While substantially reducing the weight, which was made possible by the addition of the extension, the ROTA-S flex has achieved enough strength to handle large workpieces.
For example, the ROTA-S flex 1200 is 480 kg lighter than the ROTA-S plus 1200. This means the ROTA-S flex allows machining of a workpiece up to 480 kg heavier than the one the ROTA-S plus can handle, regardless of table loading weight limits.
You can also see the merits of the ROTA-S flex when machining workpieces with the same weight. Thanks to its lightweight body, the ROTA-S flex can reduce moment required for rotation, enabling users to make full use of their machines’ potential.

ROTA-S flex
Further evolved by incorporating advantages of existing model

The ROTA-S flex inherits all advantages of its base model ROTA-S plus 2.0. In addition to quick jaw change, the ROTA-S flex provides high versatility; it can handle small workpieces just by detaching the extension from it. Moreover, the low chuck height ensures larger machining space and higher durability.

SCHUNK Intec. K.K. Locations：Minamishinagawa JN Bld. 1F, 2-2-13 Minamishinagawa, Shinagawa-ku, Tokyo 140-0004, Japan

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