Snge-ActingCyndersDoube-ActingCyli li l italindersSpecaCyndersl liCynder partsDali6● Riken products must be used at an ambient tempera-ture of 0 to 40 °C. In the case of cylinders that need a low volume of oil, the internal pressure may increase depending on the ambient temperature. In this case, a quick coupler or a one-touch coupler may not be able to be connected.1● While the cylinder is operating, the output must be 70 to 80 % of the maximum output specified in the specifi- cations.2● Select a cylinder whose stroke is longer than that to be 4● If the pump is used with an electric pump , select a liliHydraucCyndersExternal and internal drawings are available for all models. ● Please also refer to “Model Selection” on page 7.How to determine the output How to determine the strokeHow to determine the cylinder type: single-acting or double-actingReturn forceHow to determine the cylinder speed required. 3● Cylinders are classified into the single-acting type (load-return, spring-return) and the double-acting type (hydraulic-return) according to the return function. ● Load-return types have no return function. An external force is required to return the piston.………………………………………………………………40 kN cylinder100 kN cylinder200 kN cylinder300 kN cylinder500 kN cylinder1000 kN cylinderforce to return the piston only. In addition, the return time varies depending on the hose length, etc.● Select a double-acting type if the cylinder is frequently used or if pull output is required when a heavy jig is attached to the piston.pump suitable for the application referring to the cylin-der speed table (on page 226). The cylinder speed must be within the follow-ing speed specifications. Otherwise, the equip-ment may be damaged or scattered mattermay cause injury.[Standard type] Under no load condition: 500 mm/s max.30 mm/s max.● The cylinder should be loaded vertically. ● The allowable eccentric load is within 2.5 % of the load Approx. 0.07 kNApprox. 0.15 kN Approx. 0.35 kN Approx. 0.45 kN Approx. 0.75 kN Approx. 1.50 kN ● The return spring of a single-acting cylinder generates 50 mm/s max. ● During operation, the hydraulic oil temperature must be within 5 to 60 °C. ● Riken products are designed for indoor use (except some products).7● If a cylinder that works normally with self-sealing cou-plers (S-1R, S-24R, S-5R) stops suddenly, the most likely cause is looseness (a gap) between the couplers. Tighten the couplers again using a tool if a gap exists.● Avoid using the whole stroke of the cylinder. (Avoid abutting by using the whole stroke.)● A strong cylinder (see pages 34 to 36) is recommend-ed if the cylinder is frequently used. Please contact us for further information.8● Upon request, 5000 kN or larger cylinders and even those that are not listed in the catalogue can be manu-factured. Please contact us for further information.9● Use a VC-70 quick coupler that eliminates loosening if a coupler is frequently removed or is subject to vibra-tion (see page 170).● If the impact pressure is high (e.g. punchings), do not use S-1, S-2, and ROC couplers. ● Securely and completely connect the couplers.Do not connect or separate the couplers while pressure is applied.● If pressure is likely to be applied to the inside of the cylinder due to the ambient temperature, use the pres-sure elimination accessory to remove pressure before connection (see page 175). 10● The contents of this catalogue are subject to change without notice. Please visit our website for the latest information. GapCylindersHow to Select Hydraulic Cylinders and Handling PrecautionsIf attaching a heavy jig or the like to the piston, select a pump with a falling-by-self-weight prevention valve. Other-wise, there is a danger of sliding of the piston at a speed which the pump cannot handle or caused by the weight of the jig, etc. when the pump does not work.At 70 Mpa: [Strong type] Under no load condition: 1000 mm/s max.At 70 Mpa: Operating environmentHandling PrecautionsSpecial cylindersAttached couplersOther cat-No.78E since201712https://www.rikenkiki.co.jp
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