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Table of Contents◗TENSION CONTROL BRAKESWeb ProductsNEXEN XTB TENSION CONTROL BRAKESCool performance for hotter profits.XTB shaft temperature at140° F, (60° C), the shafttemperature of a competitivebrake at 240° F, (115° C) .The new airflow pathdesign that keeps theXTB brake cool.The caliper fins redirect dissipated heatout into spaceIt’s just one feature of this brakethat will help generate hotterprofits. Its lower weight androtational inertia will simplifyinstallation and reduce web waste.Quick change componentsmake maintenance a snap.Plus, Nexen technical service,parts and accessories are onlya phone call away. No othertension control brake in theindustry has such a comprehensivepackage of features.Affordably priced, the XTBseries comes in various sizes tofit your application.With all these features, itmakes you wonder why you’dconsider using any othertension control brake.200Keeping cool with theXTB airflow path.Unlike other brake designs thatcan direct heat back into thebrake, shaft and bearings, theXTB maximizes heat dissipationby deflecting it away fromthe brake components.This unique airflow design usesfins on the rotor, hub back andcalipers to throw dissipatedheat into space, not into thebrake or shaft. The design alsohelps draw cooler air aroundand over the brake.The new,one-piece lightweight rotorpulls cool air into the brake anddraws it over the air hoses sothey don’t overheat and crack.Note that air hoses run alongthe inner, not outer, circumferenceof the calipers. This keepshose lengths to a minimum, tohelp protect them and keepthem cool.The airflow path then directsthe air over the caliper fins.These fins redirect air out andaway from the assembly.Fins on the back of the hubalso draw cool air back overthe calipers to help cool thefriction material and hoses.Tests run with the brakes atmaximum torque show theRecommended shaft bearingtemperatures are normallyaround 170 ° F, (76° C). If thisheat is not directed away, ittravels back into the brake andup the shaft to the bearings.This can cause brake fade,shaft crystallization and bearingseal meltdown.Less weight for lowerrotational inertiaNot only is Nexen’s rotorlighter than other brake rotors,the entire brake weighs 40%of what other brakes weigh forRPM = V/2πRI = wk 2Unwind roll dynamicsV = product velocity(constant)R = unwind roll radiusI = inertiaw = weightk = radiusup to 2/3 less rotational inertia.Lower weight and lowerrotational inertia are criticalbecause of the dynamics of theunwind roll. Tension is constantand the radius is changingconstantly. Lower rotationalinertia makes the XTB moreprecise at lower torques. This isespecially important whenrunning delicate materials thatrequire precise tension, suchas tissue or nylon.Lower rotational inertiafor less web wasteThe XTB has up to 2/3 lessrotational inertia than otherbrakes. Rotational inertiacreates undesirable tensionthat can break your web beforeFins on the one-piece rotor help deflecthot air and draw cool air over the brake.your material runs all the wayto the core. And your web willbreak even earlier whenrunning delicate materials.Why waste several hundredfeet of product every roll dueto breakage?Precisely control eachcaliper pneumaticallyor electronicallyThere are 2 pistons thatactivate the friction pads oneach caliper. Choose up to 9calipers per brake, dependingupon brake size.Precise control of the airpressure to the calipersgenerates the low to hightorque range. High torquemaintains the tension needs ona large roll of material. Lowtorque yields the delicatecontrol needed near the core.You get this precision controlby using Nexen’s Three StageCaliper Control to divide thenumber of XTB calipers intothree groups, or stages.Pneumatically control thesestages individually or incombination. This gives you theeffect of having several brakeswith different torque ranges.For the ultimate in precisionunwind control, combine theThree Stage Caliper Controlwith a Nexen Electronic TensionControl System. Don’t risk downtimeby using another brakeyou can’t accurately control.
Table of ContentsWeb ProductsTENSION CONTROL BRAKES ◗Friction pads are completelyinterchangeable, so you won’tneed to stock different sizepads for different size brakes.These features will maximizeyour uptime and keepmaintenance simple.Nexen Kits and AccessoriesFor information on Nexen kits, accessories or parts, including completeassemblies or individual rotors, hubs, mounting plates, frictionpad kits or brake guards, call 800-843-7445.For precise control, choose a Nexenpneumatic or electronic controller.Choose from a full lineof controllersChoose either single caliper orthree stage caliper control forpneumatic control. For electroniccontrol, choose from severalmodels that vary by programability,readout and controlsophistication. Please consultNexen for the best controllerfor your application.Less weight for easierinstallation40% less weight also makesXTB brakes easier to installand maintain. You will not needto adjust pad overhang or shimthe pads for proper installation.A lighter brake also puts lessstrain on shafts, unwind rolls,bearings and stands.Remove the disc without removing ordisassembling the brake.Change the disc withoutremoving the brakefrom the shaftChanging the disc on otherbrakes is no simple task. Youmust remove the brake fromthe shaft and mark the locationfor the new disc. Then youmust disassemble it until youhave enough access to removethe old disc. With the XTB, youcan change the disc by pulling itfrom the shaft without removingthe entire brake. The new disccan be installed without markingthe disc location because thehub stays locked and locatedon the shaft.GUARDFRICTION PAD KITROTOR/HUB/MOUNTING PLATEASSEMBLYCALIPER ASSEMBLYCool performance for hotter profitsThe XTB brake gives you superior heat dissipation for worry-freeperformance, less weight for lower rotational inertia, and easierinstallation and maintenance. All this plus technical service fromthe folks who have been designing and manufacturing pneumaticallyactuated brakes for over 50 years. Add this to a full line ofweb controlling products with technical service to match and youwon’t go anywhere else for your web tension needs.Spring-loaded retaining pins make thefriction pads easy to changeFriction pads changequickly without tools,springs or cotter keys.Change the caliper frictionpads by releasing two springloadedfriction facing retainingpins that hold them in place.Replace them in seconds withouttools, leaf springs, hitchpins. Pad retaining rod, pins orclips. There are no screws orcotter keys to remove or dropinto the machinery. You do noteven have to remove the caliperfrom the brake to change thefriction pad.XTB Cooling EnhancementIncrease heat dissipation atlower RPMs for increased performancewithout upgradingbrake size. This squirrel cagefan mounts on the brake guardand blows air onto the hub anddeflects heat out through thedisc. Use it at lower RPMswhen the rotor is less effectiveat dissipating heat because ofthe lower speed. Works on allXTB tension control brakes.Operates on 110 volts. Don’tbuy a larger brake just to gethigher heat dissipation specifications.Try this coolingenhancement first!6.00[152,4]3.3125[79375]7.125[181]4.75[120,6]3.969[100,8]3.375[85,7]Ordering Information.391[9,93]Mounting Holes#10-242.875[73]Model ProductNumberShippingWt. Lbs.[kg]XTB Cooling Enhancement 835175 6.0 [2,7]3.625[92].375[9,5]5.75[146]XTB Guard5.3125[134,9]56875[144,4]201
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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 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◗CLUTCH/BRAKES
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Table of Contents◗CLUTCH/BRAKESA
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Table of ContentsCLUTCH/BRAKES “A
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Table of Contents◗WEB AUXILLARY C
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Table of Contents◗REPAIR KITS“A
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