Industrial Shock Absorbers ORIGA – simply the first All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 1 Information on application The contents of this catalogue are not binding and are only intended for in- Importance of EU Directives formational purposes and are not to be considered as offer with legal effect. Various Directives have been issued by the EU Commission in the course of A written confirmation of order from HOERBIGER is authoritative for the the unification of the single European market; the following Directives are in conclusion of a contract; this confirmation is given solely under the respec- part of significance for ORIGA products: tive currently applicable HOERBIGER General Terms of Sale and Delivery. These are included in our price list and in the Internet at www.hoerbiger. – Simple pressure vessels (87/404/EWG, amended by 90/488/EWG and com. 93/68/EWG) – Low-voltage electrical equipment (73/23/EWG, amended by 93/68/EWG) All the products presented in this catalogue are purely for commercial use. – Machinery Directive (89/392/EWG, amended by 91/368/EWG, None of the information or contents is appropriate for private consumers. 93/44/ EWG and 98/37/EG) Private consumers cannot place orders based on the information in the cata- – Pressure Equipment Directive (97/23/EWG) logue. Please contact HOERBIGER for further information. – Equipment and protective systems intended for use in potentially explosive atmospheres (ATEX Directive, 94/9/EG) All the products listed in this catalogue are designed for typical pneumatic – Electromagnetic Compatibility Directive (EMV Directive, 89/336/EWG, applications which e.g. are installed in higher-level machines. The recog- amended by 92/31/EWG) nized technical rules for safe and expert work are to be observed for the use If a product comes within the scope of application of one of these Guide- and installation of pneumatic products. The precondition for the use of the lines, then an EU Declaration of Conformity with CE mark (CE for Commun- products is, unless stated otherwise, correctly prepared compressed air free auté Européenne) is required. This CE marking does not represent a quality from aggressive media. Furthermore, the respective regulations of the legis- feature but verifies that the conformity assessment procedure specified has lator, the TÜV (Technical Inspection Association), the respective professional been concluded successfully and the protective requirements of the relevant associations or the VDE (Association of Electrical, Electronic and Information EU Directives have been observed. Technologies) provisions also apply. Products which do not come under any of the above mentioned Directives The technical data stated in this catalogue is to be observed by the user. may not bear the CE mark nor may any manufacturer’s declaration accord- The data stated may not be exceeded nor fallen short of. If such data is not ing to the EU Machinery Directive or Declaration of Conformity be issued for stated then it may be assumed that there are no such upper or lower limits these products. or restrictions for particular applications. In the case of unusual physical or chemical applications, consultation and clearances are to be obtained from If a product may not be CE marked according to the Machinery Directive, it HOERBIGER. must however be marked if it comes within the scope of application of any Unless otherwise agreed in individual cases, the customer or end other Directive. consumer is responsible for the disposal of the ORIGA products. The following harmonized standards are applied in the design of ORIGA Disposal by HOERBIGER is not included in the price and this would have to components and systems: be taken into account in the event of any applicable return to and disposal – DIN EN ISO 12100 Safety of machinery by HOERBIGER. – DIN EN 60204.1 Electrical equipment of machines Technical data and representations – DIN EN 983 Safety requirements for fluid power systems and their components The technical data and illustrations have been compiled with great care and to the best of our knowledge. We cannot assume any guarantee for the up-to- The following Directives are of particular significance to HOERBIGER: dateness, correctness and completeness of the information. – ORIGA products in potentially explosive atmospheres, to which the above mentioned ATEX Directive applies, are treated according to the Directive The data and information such as illustrations, drawings, descriptions, and CE and EX marked. dimensions, weights, materials, technical and other performances as well as – According to the Machinery Directive, ORIGA products are mainly the products and services described in general product descriptions, components for installation in machines and therefore do not require an HOERBIGER catalogues, brochures and price lists of any type are subject EU Declaration of Conformity with CE mark. HOERBIGER-ORIGA issues to change and may be modified or updated at any time without prior an- a manufacturer’s declaration according to the Machinery Directive for nouncement by HOERBIGER. They are only binding in so far as the contract these components. This declaration corresponds to a great extent to or confirmation of order expressly refers to them. Slight deviations from such the Declaration of Conformity with the comment that commissioning is product descriptions are deemed as approved and do not affect the fulfill- only permitted if the machine or system conforms to the Directives. This ment of contracts in so far as these are considered acceptable to customers. manufacturer’s declaration impacts neither our product liability based on the product liability law nor warranty assurances according to our General This catalogue does not contain any guarantees, assured characteristics Terms of Sale and Delivery. Neither does the manufacturer’s declaration or agreements on condition by HOERBIGER for the products represented, affect our quality assurance measures according to our Quality neither expressly nor implicitly, nor with regard to the availability of the Management Manual nor our quality certification according to ISO 9001. products. Advertising statements regarding quality characteristics, properties – According to the Pressure Equipment Directive, ORIGA products are or applications of ORIGA products are without legal obligation. components of low hazard potential, thus most of the products do not come under this Directive. The exceptions to this are maintenance As far as legally permissible, any liability is excluded on the part of equipment from a certain pressure/volume level onwards. These HOERBIGER for direct or indirect damage, consequential damage, claims of components are treated according to the Directive if required and bear the any type and on any legal basis arising from the use of the information con- CE mark. tained in this catalogue. Trademarks, copyright and reproduction ORIGA products are excluded from the following EU Guidelines: The representation of industrial rights such as brands, logos, registered – End-of-life vehicles (2000/53/EG). trademarks or patents in this catalogue does not include the granting of – Waste Electronic and Electrical equipment (WEEE, 2002/96/EG) and licenses or rights of use. The use of these is not permitted without the Restriction on Hazardous Substances (RoHS, 2002/95/EG). express consent of HOERBIGER. The entire contents of this catalogue are – Pressure Equipment Directive (97/23/EWG) with the above mentioned the intellectual property of HOERBIGER. Within the meaning of copyright, exceptions. any unlawful use of intellectual property, even extracts, is prohibited. Reprinting, reproduction and translation (even extracts) are only permitted with the prior written consent of HOERBIGER. All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 Table of Contents Industrial Shock Absorber Page Technical informations 4 Survey 16 Non-adjustable Shock Absorber Type SA 10 N, SA 10 SN, SA 10 S2N 20 Type SA 12N, SA 12 SN, SA 12 S2N 22 Type SA 14, SA 14S, SA 14S2 24 Type SA 20, SA 20S, SA 20S2 27 SA 20x25, SA 20Sx25, SA 20S2x25 Type SAI 25, SAI 25S, 30 Type SA 33, SA 33S, SA 33S2, SA 33S3 33 Type SA 45, SA 45S, SA 45S2, SA 45S3 37 Type SA 64, SA 64S, SA 64 S2, SA64S3 41 Adjustable Shock Absorber Type SA 1/4 x 1/2N 44 Type SA 3/8 x 1D 46 Type SA 1/2 x 1M, SA 1/2 x 2M 48 Type SA 1/2 x 1, SA 1/2 x 2 51 Type SA 3/4 x 1, SA 3/4 x 2, SA 3/4 x 3 55 Type SA 1 1/8 x 2, SA 1 1/8 x 4 59 Type SA -A 3/4 x 1, SA 3/4 x 2, SA 3/4 x 3 63 Type SA-A 1 1/8 x 2, SA -A 1 1/8 x 4, SA -A 1 1/8 x 6 67 All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 1 All rights, errors and changes reserved © Copyright by HOERBIGER 2006 2 A4P018E-December 2006 Industrial Shock Absorbers Adjustable Non-adjustable All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 3 Smooth, Controlled Stopping of Moving Loads ORIGA shock absorbers prevent damage to moving parts and to machines and plant, destructive impact forces are absorbed by controlled linear deceleration. ORIGA shock absorbers let you The heavier the moving load and the fast- ORIGA shock absorbers convert the er it moves, the higher the kinetic energy. kinetic energy generated by the decelera- ■ increase operating speeds In automation especially, shorter and tion of the load into thermal energy. ■ increase operating loads shorter cycle times are demanded, so that Optimum operating conditions are ■ increase system performance stopping times are greatly reduced while achieved if the energy is dissipated ■ increase operating reliability kinetic energy levels are dramatically almost uniformly, i.e. if the moving mass ■ reduce stresses on equipment in-creased. These again have to be dissi- is brought to a halt in the shortest dis- ■ reduce production costs pated in a controlled manner. tance, in the shortest time and without ■ reduce noise levels Some commonly used stop-ping devices sudden peak loads during the stroke. such as springs, rubber buffers or dash- All moving parts in a produc-tion process pots actually increase shock loading in- have to be stop-ped without damage to stead of reducing it – they do not them-selves or to the stopping devices of dissipate energy at a uniform rate. the machines and plant. For smooth dissipation of the kinetic The high impact forces have to be energy we recommend the use of reduced in a controlled manner: to bring hydraulic shock absorbers. a moving load to a standstill, the kinetic energy generated by the movement has to be dissipated. Oil return passages Precision surfaces guarantee Hardened steel metering optimum function ■ tube has knife-edge orifices for high flow efficiency Extra long rod bearing Full-length body thread for high side forces and ■ maximum mounting maximum life versatility Closed-cell accumulator sponge ■ metric or American thread ■ The oil forced through the meter- ing holes compresses the sponge. ■ When the piston rod is unloaded the sponge expands and forces the oil back into the bore, while Strong return spring the spring returns the piston to its for shortest cycle times starting position. Floating piston head with built-in check valve for oil flow control during operation Large-diameter hardened and chromium-plated piston rod for high force absorption Piston rod seal Stop collar ■ prevents „bottoming out“ at end of stroke All rights, errors and changes reserved © Copyright by HOERBIGER 2006 4 A4P018E-December 2006 A Wide Range of Applications High-pressure hardened steel metering tubes ■ knife-edge orifices for high flow High-pressure metallic efficiency piston ring ■ no readjustment if fluid tempera- ture changes Easy replacement of seals on site Adjustor provides settings from „hard“ to „soft“ and back to „hard“ in one turn (360°) Ball-type check valve for positive closure Extra-long rod bearing for high side forces and maximum life Corrosion-resistant return spring as standard Wrench flats for easy installation Closed-cell accumulator sponge Thread at both ends for mounting versatility Precision surfaces guarantee optimum function Large-diameter hardened and Hardened button chromium-plated piston rod for Corrosion-resistant body ■ optional soft pad available for high force absorption low-noise, scratch-free operation Precision-machined shoulders for accurate positioning and easy rotation for access to the adjustor Simplify your design work by installing our shock absorber dimensions on your system. The file is compatible with all popular CAD systems. All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 5 Shock Absorption Ordinary shock absorbers, springs, Although the moving object is stopped, it Hydraulic dashpots also cause excessive buffers and pneumatic cushioning cannot bounces back and this leads to fatigue in loads because peak resistance comes match the performance of ORIGA shock materials and components which can at the beginning of the stroke and then absorbers. cause premature breakdown of the quickly falls away. This generates These shock absorbers match the speed machine. unnecessarily high braking forces. and mass of the moving object and bring Pneumatic cushioning provides a better it smoothly and uniformly to rest. solution because the energy is actually Springs and buffers, on the other hand, converted, but because of the compressi- store energy rather than dissipate it. bility of air the maximum braking force is generated at the end of the stroke, which can lead to excessive loads on compo- nents. Force (N) Hydraulic dashpot v (m/s) Industrial shock absorber Hydraulic dashpot Pneumatic end cushioning t Spring Industrial shock absorber t Stroke (s) Stopping time (t) The Force/Stroke Diagram Stopping Time clearly shows these effects. The shock absorber curve is ideal Both damping units stop the same mass from the same speed because all the energy is dissipated by linear deceleration with the same stroke. Therefore they do the same work but the without initial impact or final rebound. industrial shock absorber reduces the stopping time by 60 to 70 %. All rights, errors and changes reserved © Copyright by HOERBIGER 2006 6 A4P018E-December 2006 Selection of Shock Absorber Type ORIGA shock absorbers are available in two main types, to suit different applications and installation requirements. After selection of the appropriate type, sizing is determined by calculation. Compact series with full-length Accumulators Options body thread Normally shock absorbers with internal ■ Stop collars for front or rear mount- This compact, space-saving series is accumulators are used. This simplifies ing – these provide a positive stop to available in adjustable and installation by eliminating external piping prevent damage caused by the piston non-adjustable versions and can be and oil storage. „bottoming out“. installed in many different ways, e.g. in However, in applications with short cycle They also allow precise setting of the a tapped blind hole, in a tapped through- times and high kinetic energy the oil stroke length. hole, in a clearance hole in a flange or can become overheated. In this case an ■ Soft pad for the hardened steel button bracket, etc. external accumulator should be used so – to avoid surface damage and reduce that the oil can be cooled in the external noise levels. circuit. Shock absorber return stroke ■ Piston rod with return spring combined with internal accumulator ■ Return stroke actuated by compressed air or mechanically, combined with ex- ternal accumulator. With this version a delayed return stroke is also possible. Universal series This versatile, adjustable series with various mounting accessories is designed to stop heavier loads. It is especially suited to applications which require several of the same shock absorbers with the same stroke length. ��� Mounting methods ORIGA shock absorbers are designed for a variety of mountings, which can be either built into machines or supplied as accessories. All rights, errors and changes reserved © Copyright by HOERBIGER 2006 A4P018E-December 2006 7 The Selection of Shock Absorbers Correct choice of shock absorber an open or closed tank, is connected to The SA Series is fitted with return springs The type of shock absorber and its the shock absorber by pipework. as standard. If these types are used with mounting method are mainly determined The oil heated in the shock absorber an external accumulator for better heat by the application. circulates between the tank and the dissipation, this does not need to be In most applications, shock absorbers shock absorber and is therefore pressurized because the spring returns with internal accumulators are preferred continuously cooled during operation. the rod. to those with external accumulators. The reason for this is that shock absorb- Note: ers with internal accumulators are sup- The tank should always be installed plied prefilled with oil and therefore ready higher than the shock absorber and the for immediate use, where as shock connecting pipework should be as short absorbers with external accumulators as possible. require additional equipment, resulting If possible there should also be a 10 µm in higher installation costs. filter between the two units. If the tank is installed further away from Selection criteria the shock absor-ber there must be a ■ Type of shock absorber positive oil circulation system (see – with internal accumulator diagram) to ensure that the oil actually – with external accumulator including flows through the tank and is cooled air/oil tank down. ■ Type of piston rod return – return spring Piston rod return – air or mechanical Piston rod return is actuated by ■ Stroke length ■ Return springs Use the longest stroke possible taking In the self-contained units, a built-in any side loads into account. spring returns the piston rod to its rest – maximum impact force reduction position when it is unloaded. ■ Air/Oil Accumulators In units with external accumulators an ■ Internal accumulator air/oil system or a mechanical device is The fluid displaced by the piston used for piston rod return. compresses a nitrogen-filled, closed- ■ Mechanical units cell sponge. Mechanical rod return is mostly used When the piston is unloaded the return in types with a clevis mounting, with spring pushes the piston back to its actuation by another unit via levers. rest position. At the same time the ORIGA SA-A Series shock absorbers compressed sponge expands and feature steplessly adjustable stroke, time- forces the fluid back into the high delay damping and adjustable rod return pressure chamber. forces. ■ External accumulator The use of external accumulators is recommended where high energy conversion is needed or excess heat dissipation is required, e.g. in applica- tions with short cycle times or in high temperature areas. The external accumulator, consisting of All rights, errors and changes reserved © Copyright by HOERBIGER 2006 8 A4P018E-December 2006
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