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Example 13Vertical-RotaryWEIGHTDISTANCE FROMPIVOT TO CENTEROF GRAVITY(INCHES)SHOCK ABSORBERMOUNTINGRADIUS (INCHES)W = 500 lbs.K = Distance to C.G. = 34 in.V = 4 ft./sec. @ 34 in.Rs = Shock absorber mtg.radius = 32 in.S = 2 in. *C = 100/hr.Vs = Vel. @ Rs (ft./sec.)E 1= .2WVT² = .2 x 500 x 4² = 1,600 in-lbs.F = (W x K) / RS = 500 x 34 / 32 = 531 lbs.E 2= F x S = 531 x 2 = 1,062 in.-lbs.E 3= E 1+ E 2= 1,600 + 1,062 = 2,662 in.-lbs.E 4= E 3x C = 2,662 x 100 = 266,200 in.-lbs./hr.VS = V x RS / [K] = 4 x 32 / [34] = 3.76 ft./sec.WE = E 3/ [.2VS ] = 2,662 / [.2(3.76)²] = 941 lbs.STROKE(INCHES)Model Selection: SALD ¾ x 2Example 14Vertical-Rollover-Turn OverROTATIONROLLOVERPARTVELOCITYW = 1,500 lbs.A = 180º Angle of RotationRs = 62 in.T = 12,000 in.-lbs.S = 2 in. *C = 100/hr.RR = 60 in. Radius of RolloverVR = Vel. @ RR (ft./sec.)Vs = Vel. @ Rs (ft./sec.)t = 3 sec. Time of RotationVR = RR x A / [688t] = 60 x 180 / [688 x 3] = 5.24 ft./sec.E 1= .1WVR² = .1 x 1,500 x 5.24² = 4,119 in-lbs.F = T / [RS] = 12,000 / [62] = 194 lbs.E 2= F x S = 194 x 2 = 388 in.-lbs.E 3= E 1+ E 2= 4,119 + 388 = 4,507 in.-lbs.E 4= E 3x C = 4,507 x 100 = 450,700 in.-lbs./hr.VS = RS x A / [688t] = 62 x 180 / [688 x 3] = 5.4 ft./sec.WE = E 3/ [.2VS] = 4,507 / [.2(5.4)²] = 722 lbs.Model Selection: SALD 1½ x 2*Note: These items will vary with individual applications and were selected for illustration purposes only.Example 15Horizontal Application Moving Load- Rotary Table Motor Driven with Additional Load InstalledDRIVETORQUE(T)(W)WEIGHTANGULARVELOCITYRLRTSHOCKSTROKEWLRSW = 440 lbs.WL= Additional weight = 100 lbs.RL= Radius to load C.G.from pivot – 8 in. *S = 1 in. *C = 1/hr.w = 1 radian/sec.Rs = 8.86 in.T = 2,200 in.-lbs.RT = 20 in.VT = Vel. @ RT (ft./sec.)VL = Vel. @ RL (ft./sec.)VS = Vel. @ RS (ft./sec.)VT = w x RT / [12] = 1 x 20 / [12] = 1.67 ft./sec.E 1 (TABLE)=.1WVT² = .1 x 440 x 1.67² = 123 in.-lbs.VL = w x RL / [12] = 1 x 8 / [12] = .67² = 9 ft./sec.E 1 (ADD 'L LOAD)= .2WLVL² = .2 x 100 x .67² = 9 in.-lbs.E 1 (TOTAL)= E 1 (TABLE)+ E 1 (ADD'L LOAD)= 123 + 9 = 132 in.-lbs.F = T / RS = 2,200 / 8.86 = 248 in.-lbs.E 2= F x S = 248 x 1 = 248 in.-lbs.E 3= E 1+ E 2= 132 + 248 = 380 in.-lbs.E 4= E 3+ C = 380 x 1 = 380 in.-lbs./hr.VS = w x (RS / 12) = 1 x 8.86 / [12] = .74 ft./sec.WE = E 3/ [.2VS²] = 380 / [.2(.74)²] = 3,470 lbs.15Model Selection: SALD ¾ x1 (Due to effective weight)23435 Industrial Park Dr., Farmington Hills, MI 48335 • p: 734-595-4500f: 734-595-6410 • customerservice@enertrols.com • www.enertrols.com
Example 16Vertical-Rotating Beam Driven by Air CylinderωSRCKRSCyl Dia. = 3 in.PSI = 70w = 3 rad./sec.W = 1,900 lbs. at C.G.K = 20 in. to beam C.G.S = 2 in. *C = 100/hr.RS = 32 in.Vs = Vel. @ Rs (ft./sec.)Rc = 18 in.I = W x K² / [386] = 1,900 x 20² / [386] = 1,969 in.-lbs./sec.²F = .78 x D² x PSI x RC / [ RS ]= .78 x 3² x 70 x 18 / [32] = 276 lbs.E 1= I x w² / [2] = 1,969 / [2] x 3² = 8,861 in-lbs.E 2= F x S = 276 x 2 = 552 in.-lbs.E 3= E 1+ E 2= 8,861 + 552 = 9,413 in.-lbs.E 4= E 3x C = 9,413 x 100 = 941,300 in.-lbs./hr.VS = 0.83 x RS x w = 0.83 x 32 x 3 = 8.00 ft./sec.WE = E 3/ [.2VS²] = 9,413 / [.2(8)²] = 735 lbs.Model Selection: SALD 1-1/8 x 2*Note: These items will vary with individual applications and were selected for illustration purposes only.Example 17Vertical-Motor Driven Rotating Arm with Attached Load Opposing GravityαRSModel Selection: SALD ¾ x 2S(T) DRIVETORQUEKωW = 150 lbs.K = 36 in.Rs = 27 in.w = 3 rad./sec.a = 30ºT = 3,000 in.-lbs.S = 2 in. *C = 175/hr.Vs = Vel. @ Rs (ft./sec.)I = W / [386] x K² = 150 / [386] x 36² = 504 in.-lbs./sec.²F = T - W x K x Sin a / [RS] = 3,000 - (150 x 36 x 0.5) / 27 = 11 lbs.E 1= I x w² / [2] = 504 x 3² / [2] = 2,268 in-lbs.E 2= F x S = 11 x 2 = 22 in.-lbs.E 3= E 1+ E 2= 2,268 + 22 = 2,290 in.-lbs.E 4= E 3x C = 2,290 x 175 = 400,750 in.-lbs./hr.VS = .083 x RS x w = .083 x 27 x 3 = 6.72 ft./sec.WE = E 3/ [.2VS²] = 2,290 / [.2(6.72)²] = 254 lbs.General InformationExample 18Vertical-Motor Driven Rotating Arm with Attached Load Aided by Gravity(W)WEIGHTαSRSωK(T) DRIVE TORQUEW = 350 lbs.K = 36 in.Rs = 27 in.w = 3 rad./sec.a = 40ºT = 2,500 in.-lbs.S = 2 in. *C = 175/hr.Vs = Vel. @ Rs (ft./sec.)I = W x K² / [386] = 350 / [386] x 36² = 1,175 in.-lbs./sec.²F = T + W x K x Sin a / [RS]= 2,500 + (350 x 36 x .643) / [27] = 393 lbs.E 1= I x w² / [2] = 1,175 x 3² / [2] = 5,288 in-lbs.E 2= F x S = 393 x 2 = 786 in.-lbs.E 3= E 1+ E 2= 5,288 + 786 = 6,074 in.-lbs.E 4= E 3x C = 6,074 x 175 = 1,062,950 in.-lbs./hr.VS = 0.83 x RS x w = 0.83 x 27 x 3 = 6.72 ft./sec.WE= E 3/ [.2VS²] = 6,074 / [.2(6.72)²] = 673 lbs.Model Selection: SALD 1-1/8 x 2*Note: These items will vary with individual applications and were selected for illustration purposes only.23435 Industrial Park Dr., Farmington Hills, MI 48335 • p: 734-595-4500f: 734-595-6410 • customerservice@enertrols.com • www.enertrols.com16
Page 3: Any mechanism that moves and that m
Page 8 and 9: Construction & Design FeaturesMinia
Page 10 and 11: Standard Shock AbsorbersGold Line
Page 12 and 13: Accessories & Special Application S
Page 14 and 15: Selecting the Correct Type of Shock
Page 16: Selecting the Correct Size Shock Ab
Page 19: Example 9Horizontal-Moving Load-Rot
Page 23 and 24: Example 22Vertical Rotating Arm - C
Page 25 and 26: Model Rating ChartsShock Absorber S
Page 27 and 28: Self-Compensating ECA ModelsModel N
Page 29 and 30: Construction and Parts Descriptions
Page 31 and 32: Installation Recommendations and Ti
Page 33 and 34: Additional Enertrols ProductsShock
Page 35 and 36: SM 9 to SM 75MFSub-Miniature Shock
Page 37 and 38: SNALD 150 to 600Miniature Shock Abs
Page 39 and 40: SNALD 1/2 Bore x 1, 2"Miniature Sho
Page 41 and 42: SA 30 to 150 & 1/4" BoreMiniature S
Page 43 and 44: SALD 3/8 Bore x 1"Miniature Shock A
Page 45 and 46: SALD 1/2 Bore x 1, 2"Miniature Shoc
Page 47 and 48: Industrial Shock AbsorbersWeartec P
Page 49 and 50: SNALD 33, 45 & 64 SeriesOrdering In
Page 51 and 52: SNALD 33 SeriesMid-Size Shock Absor
Page 57 and 58: AccessoriesSNALD Mid-Size 33, 45 &
Page 59 and 60: SALD ½ x 1, 2-P, SALD ¾ x 1, 2, 3
Page 61 and 62: Gold Line ® & Silverline ® Primar
Page 63 and 64: Retention Kit for MSC Installations
Page 65 and 66: SALD 3/4, 1-1/8,1-1/2, 2-1/4Gold Li
Page 67 and 68: Positive Stop Collar (-PSC) for Fix
Page 69 and 70: SILVERLINE ® SeriesDimensions in i
Page 71 and 72:
High Precision Metric (HPM) Series
Page 73 and 74:
EA 2 to EA3Heavy Industrial Shock A
Page 75 and 76:
ECA and EA 2", 3" Bore SeriesECA Se
Page 77 and 78:
ECA and EA 2", 3" Bore SeriesECA Se
Page 79 and 80:
ECA 4" Bore SeriesHeavy Duty Models
Page 81 and 82:
Stacker Crane Shock Absorbers ESCS-
Page 83 and 84:
Stacker Crane Shock Absorbers ESCS-
Page 85 and 86:
Industrial Crane Bumper Shocks ECB-
Page 87 and 88:
Industrial Crane Bumper Shocks ECB-
Page 89 and 90:
Dimensions in inches and (mm)ABCD0.
Page 91 and 92:
AR0.27(R7)BC0.32(8.1)0.55(14)M8 x 1
Page 93 and 94:
Mounting Brackets for Hydraulic Dam
Page 95 and 96:
EDVC Velocity & Feed ControllersC51
Page 97 and 98:
EVC Velocity & Feed Controllers wit
Page 99:
Stocking DistributorsUSA, Canada an
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