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Table of Contents◗TENSION CONTROL BRAKESWeb ProductsSTB 600 AND 940 BRAKESSuperior tension control through a broad torque range.Diagram 1: Plumbing the 600/940with no valvesDiagram 2: Plumbing the 600/940with three valvesThe STB 600 and 940 Brakesallow superior torque controlfor your web with Nexen’s lineof patented tension controlbrakes. Three different sizedpiston sets can be actuatedsingly, or in any combinationfor a large number of torqueto-airpressure ranges.This unique design gives youprecise torque control withoutthe problems associated withoperating at low air pressures.Ventilated rotor keepsthe clutch and brake coolThe ventilated rotor creates anairflow path that draws coolerambient air into the center ofthe rotor. The flow path directsair past the interface anddissipates heat radially awayfrom the unit. This keeps theunit running cooler and longerfor better performance.Different piston sizesgive you the widest rangeNexen’s brakes actuate using apiston / diaphragm combinationin three different sizes.There are no o-rings to stick,no seals to drag. There’s nothingto hinder precise control oftorque at lower operating pressures.By engaging and disengagingvarious combinations of small,medium and large piston sets,you’ll have a broad range oftorque vs. Air pressurecombinations. This gives youprecise control over a widerange of torques and airpressures and lets you run awider variety of materials onthe same machine.Features and benefits• Fine torque control forprecise tension control ofweb processes - 500:1tension control range• Field and dynamicprogramming of pressure/torque characteristics forflexible operations• Diaphragm operation — noseals to drag or o-rings tostick for great low pressureperformance• Different size piston sets• Through-shaft mounting• Compact size• No rotary air unionsrequired — eliminates"gun drilling" shaftsVariable torque rangesthrough the use of valvesUse air valves to engage combinationsof pistons as shownin Diagram 2. Read the torquevalue for each piston setdirectly from the Torque vs. AirPressure graph on the nextpage and add them.Example: STB 600Large piston set at 40 p.s.i. hasa rated torque of 95 in-lb.Medium piston set at 40 p.s.i.has a rated torque of 67 in-lb.Small piston set at 40 p.s.i. hasa rated torque of 41 in-lb.Total torque at 40 p.s.i.:Large + Medium =95 + 67 = 162 in-lb.Small only = 41 in-lb.The total torque range of thebrake will equal the sum of thetorques of the individual sets from0 to maximum air pressure.216
Table of ContentsWeb ProductsTENSION CONTROL BRAKES ◗STB 600 AND 940 BRAKESTorque vs. Air PressureThermal Horsepower vs. RPMSTB 600STB 940◗ SPECIFICATIONSMODEL PRODUCT NUMBER MAX. RPM TEE FITTING ELBOWS TUBING BORE DIAMETER SHIPPING WEIGHTSTB 600 927203 3600 5 3 60 Inch [1524 MM] 1.125* Inch [29 MM] 9.7 Lbs. [4,4 Kg]STB 940 927207 2400 5 3 60 Inch [1524 MM] 1.938* Inch [49 MM] 31.3 Lbs. [14,2 Kg]◗ DIMENSIONS(Shown with recommendedguard) Nexen recommendsusing adequate guarding onall brakes and <strong>clutches</strong>.*With standard square keyways.. Consult factory for otherbore size requirementsPRODUCT HUB KEY SET +.OO1 OPTIONAL GUARDMODEL NUMBER AJ3. CP1 CP2 CP3 CR CR1 CS CW LENGTH (SQ.) KL P PA PB PC SCREW U -.OO1 PRODUCT NUMBERSTB 600 927203 .8006 1.36 2.06 2.50 3.46 3.86 0.27 0.55 3.39 0.250 2.00 6.00 2.04 6.62 4.02 .312-18 1.125 927206[20,34] [35] [53] [64] [88] [98] [6,9] [14] [86] [6] [51] [152] [52] [168] [102] [8] [29]STB 940 927207 .140 1.78 2.52 3.01 4.51 4.93 0.37 0.74 4.44 0.500 3.00 9.40 3.33 10.02 5.72 .500-13 1.938 927210[4] [5] [64] [76] [115] [125] [9] [19] [113] [13] [76] [239] [85] [255] [145] [13] [49]SHAFT INERTIA PILOT INERTIALB. Ft 2 LB. Ft 2MODEL [Kg. m 2 ] [Kg. m 2 ]STB 600 0.133 0.133[0,006] [0,006]SHAFT INERTIA PILOT INERTIALB. Ft 2 LB. Ft 2MODEL [Kg. m 2 ] [Kg. m 2 ]STB 940 0.725 0.955[0,034] [0,040]217
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Table of ContentsPRODUCTCAT ALOG10-
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Table of Contents◗PRODUCT NUMBER
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Table of Contents◗FAMILY OF PRODU
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Table of Contents“Air Champ” ®
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Table of Contents◗APPLICATION GUI
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Table of ContentsWeb ProductsGUIDE
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Table of Contents◗ MICRO FRICTION
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Table of Contents◗“Air Champ”
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Table of ContentsWeb ProductsIn acc
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Table of ContentsWeb ProductsTENSIO
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Table of ContentsWeb ProductsHousin
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Table of Contents◗ AIR PRESSURE C
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Table of ContentsEclipse SERVOMOTOR
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Table of ContentsEclipse SERVOMOTOR
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Table of ContentsEclipse LINEAR MOT
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Table of ContentsEclipse NEMA AC MO
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Table of ContentsEclipse METRIC AC
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Table of Contents◗ BW MODEL BRAKE
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Table of Contents◗CALIPER BRAKES
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Page 178 and 179: Table of ContentsDRUM BRAKES “Air
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Table of ContentsCLUTCH/BRAKES “A
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Table of ContentsCLUTCH/BRAKES “A
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Table of Contents◗CLUTCH/BRAKES
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Table of Contents◗METRIC CLUTCH/B
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Table of Contents◗WEB GUIDING CON
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Table of Contents◗WEB AUXILLARY C
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Table of Contents◗CONTROLS“Air
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Table of Contents◗REPAIR KITS“A
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