Company Brochure
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Your Safety in Focus

The Safety Company We are the specialists SITEMA is the only company in the world specializing in the development and production of clamping devices and linear brakes. The consequence of that specialization: SITEMA is an internationally respected partner to machinery manufacturers. We specialize in securing, clamping and fixing loads in axial motion. It is a field in which we have been a leading brand name for many years, particularly with our SITEMA Clamping Heads. Alongside our broad product portfolio, we offer unique consulting and solution-delivering expertise to meet any challenge....

Continuous improvement Sustained progress Customer-oriented testing When you have a mature product range, it’s all about optimizing the detail. SITEMA’s development team delivers continuous improvement in design and ensures regular expansion of the product portfolio. One of the fruits of those efforts was the PowerStroke, an innovative solution for holding molds closed. Find out more about the clamping head with integrated short stroke cylinder on page 20. For clamping force testing, SITEMA has presses with up to 1000 metric tons test force as well as a dynamic test rig for drop speeds up...

Quality creates trust Guaranteed reliability Our success is founded on adherence to the very highest quality standards in our products. Because safety components absolutely have to deliver functional reliability – and that is something we do as a matter of course. SITEMA Clamping Heads are approved as restraint device by the competent European bodies. Immediately following on from the production process, each individual clamping head is checked in terms of functionality and holding force on our own inhouse test rigs. The complete test documentation is archived and available for customers to...

We do everything for your safety Development and design. Project management and customer contact. Fabrication and assembly. Outgoing testing and shipping. We do not let anyone else take care of your safety – we handle everything ourselves.

Safety Catchers Senes K, KR, KRP ... ■ One load direction ■ Hydraulic or pneumatic actuation ■ For loads from 10 kN to 1000 kN I Locking Units Senes KFH, KFP, KB ... ■ Both load directions ■ Hydraulic or pneumatic actuation ■ Holding forces from 1 kN to 1500 kN Safety Brakes Senes KSP ■ One load direction ■ Pneumatic actuation ■ For loads up to 30 kN PowerStroke Senes FSK, FSKP ■ Clamping head with additional short stroke function ■ Hydraulic or pneumatic actuation ■ Working forces up to 2000 kN Safety Locks Senes KRG, KRGP ■ One load direction ■ Hydraulic or pneumatic actuation ■ For loads...

Safety Catchers Personal protection and accident prevention Safety Catchers are used wherever heavy lifted loads have to be secured against falling or accidentally dropping. Safety Catchers Series K, KR, KRP ... For medium-sized, large and very large loads DGUV-approved One load direction Functional principle SITEMA Safety Catchers are held open hydraulically or pneumatically, depending on series, and act in the event of a pressure drop. The clamping system then grasps the rod by means of pre-tensioned springs and secures the load. However, the clamping force is only built up when the rod...

Safety Brakes Safety Brakes Securing vertically moving masses Safety for oblique and vertical axes Typical applications include oblique-angled and vertical axes in the automation industry to provide vital protection of personnel and machinery. Functional principle The SITEMA Safety Brake activates immediately in the event of a pressure drop: When a load is exerted on the rod, the clamping system closes in a self-reinforcing function. In case of overload, the rod is subjected to controlled slip at a high force level. This enables the kinetic energy of moving masses to be reduced by friction,...

Safety Locks Safety Locks Secure restraining of Lifted Loads Compact and safe The design principLe aLLows for the creation of highLy compact cLamping heads. They are ideaL for appLications invoLving pureLy static securing. Safety Locks Series KRG, KRGP ■ For static or sLow-moving masses ■ Compact design ■ One Load direction Functional principle Hydraulic or pneumatic pressure holds the SITEMA Safety Lock open. To secure the load against dropping, the Safety Lock is depressurized. If the load then starts to move down, the clamping system closes in a seLf-reinforcing function - the higher...

Locking Units Precision locking Clamping of machinery and plant components Locking units are used primarily as functional clamps for precision locking, but also for preventing unwanted movement. Functional principle Applications SITEMA Locking Units clamp a rod by an infinitely variable function without changing its position. They absorb axial forces without play in both directions. They are held open by hydraulic or pneumatic pressure, depending on series. Their clamping effect is created by spring force or pressure. The standard range also includes approved series optimized for special...

PowerStroke Generates large forces over short distances Clamping head with integrated short stroke function The PowerStroke can be used in any horizontal and vertical applications requiring large forces to be built up over short working distances. SITEMA PowerStroke series FSK, FSKP Clamping head with additional integrated short stroke function Ideal for pressing, stamping, joining, riveting, clinching, forming, embossing, closing molds, etc. Functional principle The SITEMA PowerStroke grasps a smooth round rod to then move it with great force. The SITEMA Power-Stroke holds onto the rod...

Alternative solutions We can go other ways too Alternative solutions for clamping and fixing Mechanical Safety Catcher KRM The series KRM Safety Catcher is held open by purely mechanical means, and acts in the event of breakage of the load carrier (rope, strap, chain, etc.). It uses the energy of the falling load to generate the clamping force. It is used wherever personal protection and accident prevention must be assured in conjunction with lifted loads or tools in the event of failure of a load carrier. Series KRM Safety Catchers hold falling masses by an infinitely variable function at...