ACE

76 76 Issue7.2014 Specifications subject to change ACE Controls Inc. · Tel. 800-521-3320 · (248) 476-0213 · Fax (248) 476-2470 · E-mail: shocks@acecontrols.com · www.acecontrols.com PermittedUse ACE safety shock absorbers aremachineelements tobrakemoving masses in adefinedendposition inemergency stop situations for axial forces. The safety shock absorbers arenot designed for regular operational usage. Calculationof safetyshockabsorbers Thecalculationof safetyshockabsorbersshouldgenerallybe performedor checkedbyACE. DecelerationProperties Theorifice sizing anddrill pattern in thepressure chamber are individu- ally designed for each safety shock absorber. The respective absorption characteristic is optimized corresponding to themaximummass that occurs in theemergency stop and the impact speed. Correspondingly, each safety shock absorber is given an individual identificationnumber. Model Code For typesSCS33 to64, the individual five-digit identificationnumbers canbe taken from the last digits of the shock absorbermodel code shownon the label. Example: SCS33-50-1XXXX. For type seriesSCS38 toSCS63, CB63 toCB160 andEB63 toEB160, the identificationnumber is a fivedigit number. Example: SCS38-100-F-XXXXX. In addition to the model code, the label alsoshows theauthorisedmaximum impact velocity andmaximum authorized impactmass for theunit. Mounting Tomount the shock absorber, we recommend theuseof original ACE mounting accessories shown in catalogue. Themountingof each shock absorbermust beexactly positioned so that the reaction force (Q) can be adequately transmitted into themounting structure. ACE recom- mends installation via the front ange -Fmounting style that ensures the maximumprotection against buckling. Thedampermust bemounted so that themoving loads aredeceleratedwith the least possible side loading to thepiston rod. Themaximumpermissable side load angles aredetailed inour current catalogue.Theentire stroke lengthmust be used for decelerationbecauseonly usingpart of the stroke can lead to overstressing anddamage to theunit. Mounting style front flange -F Environmental Requirements Thepermissible temperature range for each shock absorber type canbe found inour current catalogue. CAUTION: Usageoutside the specified temperature range can lead to prematurebreakdown anddamageof of the shock absorberswhich can then result in severe systemdamageormachine failures. Trouble freeoperationoutdoors or indampenvironments is onlywar- ranted if thedampers are coatedwith a specific corrosionprotection finish. Initial Start-UpChecks First impacts on the shock absorber shouldonly be tried after correctly mounting andwith reduced impact speeds and– if possible–with reduced load. Differencesbetween calculated and actual operatingdata can thenbedetectedearly on, anddamage to your system canbe avoided. If the shock absorberswere selectedon calculateddata that does not correspond to themaximumpossible loading (i.e. selection basedondrivepower being switchedoff or at reduced impact speed) then these restricted impact conditionsmust not beexceededduring initial testingor subsequent useof the system. Otherwise you risk damaging the shock absorbers and/or yourmachineby overstressing materials. After the initial trial check that thepiston rod fully extends again and that there areno signs of oil leakage. Also check that the mountinghardware isstill securely tightened. Youshouldbe fullyassured that nodamagehas occurred to thepiston rod, thebody, or the mountinghardware. FixedMechanical Stop Safety shock absorbers donot need anexternal stop as a stroke limiter. The strokeof the safety absorber is limitedby the stopof the impact headon the shock absorber. For typesSCS33 toSCS64, the fixed stop point is achievedwith the integrated stop collar. WhatNeeds tobeCheckedafter aFull Load Impact? Safety shock absorbers that wereoriginally checkedonly at reduced speedor loadneed tobe checked again after a full load impact (i.e. emergency use) has occurred. Check that thepiston rod fully extends to its full out position, that there areno signs of oil leakage and that the mountinghardware is still securely fixed. You shouldbe fully assured that nodamagehas occurred to thepiston rod, thebody, or themount- inghardware. If nodamagehas occurred, the safety shock absorber canbeput back intonormal operation (see initial start-up ). Maintenance Safety shock absorbers are sealed systems anddonot need special maintenance.Safetyshockabsorbers that arenot used regularly (i.e. that are intended for emergency stop systems) shouldbe checkedwithin the normal time frame for safety checks, but at least onceayear . At this time special attentionmust bepaid to checking that thepiston rod resets to its fully extendedposition, that there is nooil leakage and that themountingbrackets are still secure andundamaged. Thepiston rod must not show any signs of damage. Safety shock absorbers that are inuse regularly shouldbe checked every threemonths . RepairNotice If any damage to the shock absorber is detectedor if there are any doubts as to theproper functioningof theunit please send theunit for service toACE. Alternatively contact your local ACEoffice for further advice. Detailed informationon the above listedpoints canbe taken from the correspondingoperating and assembly instructions. SafetyShockAbsorber SCS SafetyShockAbsorber CB SafetyShockAbsorbers General Instructions