Cam lock differential shafts mod. 650 PLS


Cam lock differential expanding shaft model 650 PLS is composed by a series of self-expanding rings able to wrap independently several reels with different width, maintaining the same settled tension during the wrapping.

The self-expanding rings assembled on the chromium plated and grinded shell body will block the rigid cardboard core by expanding shortly on the rotating direction. A pneumatic rotary joint secured at the shaft end is adjusting the air pressure injected into the differential shaft. The air pressure range is from 0 to 6 Bar connected to the external reel diameter and to the settled tension. The differential ledges under the rings can be manufactured in different type of material according to the client’s need, therefore are interchangeable. The force of friction produced between the differential ledges and the self-expanding rings generates a perfect and independent reels rewinding. To get the best rewinding on reels you must assure that the differential shaft speed will be higher than the machine speed. The rewound reels can be easily re-moved by a small rotation on rewinding opposite direction.

Cam locks are made of either steel or plastic material covered by a nickel-plated steel ring. They come with balls, bearings, or a combination of the two.

The internal plastic material confers impressive lightness, allowing to reach critical speeds that are way higher than those obtained with similar products. Nickel-plated steel resists corrosion and grants great robustness and solidity.

Moreover, if the need of keeping the cores still during their preparation and positioning phases arises, cam locks can be equipped with springs under the balls.


Standard sizes available for this Model are listed below.

Require an estimate


Core diameter: from 50 to 300 mm

Face width: up to 9000 mm

Air pressure: min. 0/2 bar

Cam locks diameter: ≥ 45 mm (1,8”) ≤ 404 mm (15,9”)

Cam locks width: from 8 to 150 mm


Contact SVECOM for Non-Standard requirements.

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