Hand Tube Bender Manual
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Hand Tube Bender ManualContentsIntroduction. . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Bender Components. . . . . . . . . . . . . . . . . . 4 Tube Preparation. . . . . . . . . . . . . . . . . . . . . . 5 Bender Setup. . . . . . . . . . . . . . . . . . . . . . . . . 6 Making Bends. . . . . . . . . . . . . . . . . . . . . . . . . 8 Springback. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Determining Changesin Plane and Direction. . . . . . . . . . . . . . . . . 11 Vise Clamp Block. . . . . . . . . . . . . . . . . . . . . 12 Adjustment (Gain) Calculations. . . . . . . 13 Offset Bend Formula. . . . . . . . . . . . . . . . . . 16 Preparation forAccurate Bends. . . . . . . . . . . . . . . . . . . . . . . 17 Tubing Installation. . . . . . . . . . . . . . . . . . . . 18 Conversions. . . . . . . . . . . . . . . . . . . . . . . . . . 19 Decimal Equivalents. . . . . . . . . . . . . . . . . . 2034IntroductionSwagelok hand tube benders provide consistent, high-quality bends in tubing made of stainless steel, copper,steel, aluminum, and a variety of other materials.This handbook will assist you in tube preparation and proper use of the bender. We recommend reading this handbook in its entirety BEFORE using the bender.Bender ComponentsShort handleClevisLinkRoll DieBender DiesVise Clamp Block NameplateNameplateStraight Tube Length MarkTube LatchRoll SupportLong handle5Tube PreparationIt is important to use high-quality, annealed tubing and quality cutting tools.Proper deburring of both the inside diameter (ID) and outside diameter (OD) is required toremove all metal chips and burrs.Tube Deburring ToolTube CutterTube Sawing GuidePrior to making bends, it is necessary to mark the tubing.First make a reference mark on the end of the tubing to indicate where layout measurements begin.Next,make a measurement mark to indicate where the tube should be aligned in the bender.Always make this mark a full 360°around the tubing.Making Bends Bends 90°or LessBends Greater than 90°The right angle design of the Swagelok tube bender offers maximum leverage when making bends.The bender's unique design lets you continue using right angle leverage for bends greater than 90°.springback than harder tubing, such as stainless steel. Experience will help you predict the amount of spring-back.Expect to allow 1 to 3°compensation, depending on tubing material and hardness.10Determining Changes inPlane and DirectionWhen making multiple bends on asingle piece of tubing, it is importantto keep track of the correct benddirections.Y ou can do this by simplymarking the tubing longitudinally onthe outside of the intended tube benddirection or the side opposite the bend.To ensure that bends will lie in thesame intended plane, make surethe tubing is positioned and alignedcorrectly in the bender.For bends in the opposite direction of the previous bend, align the end of the tubing with the raised short handle. For bends in the same direction as the previous bend, align the end of the tubing parallel with the long handle.11Vise Clamp BlockThe Swagelok tube bender features a vise clamp block which allows you to clamp the bender in a vise.This feature is especially helpful when bending tubing of a hard material or heavy wall thickness.1213Adjustment (Gain) CalculationsWhen determining tube bend locations, adjustment factors must be considered to achieve proper layout.Adjustment (gain) is the difference in the length of tubing used in a radiused bend compared to the length of tubing required in a sharp bend, when measured from P1 to P2.See Figure above.The distance around a radiused bend is alwaysless than a sharp bend.P2m m )P1Radiused BendSharp Bend14Adjustment Formula =(2 TAN 1/2 Ø - 0.01745 Ø) ϫRTAN = Tangent Ø = Bend Angle R = Radius5040302010090°80°70°60°50°40°The adjustment factor is determined by the radius of the tube bender and the number of degrees of the bend.Bend Adjustment% o f B e n d e r R a d i u sFractional Adjustment CalculationsAdjustments on angles of less than 45°are minimal.15Offset Bend FormulaC16Preparation for Accurate BendsTo achieve configurations,mark the tubingas follows:P1= 3 in.P2=P1 + 2.5 in.– 1/4 in.adjustment = 5.25 in.P3=P2 + 3 in.– 1/4 in.adjustment = 8 in.90°adjustment=1/4 in.45°adjustment=1/32 in.17Tubing InstallationProperly selected tubing, combined with quality Swagelok tube fittings, can provide leak-tight systems. When installing fittings near tube bends, there must be a sufficient length of straight tubing to allow the tube to be bottomed in the Swagelok tube fitting:18ReliabilityFor maximum assurance of reliable performance, use Swagelok tube fittings assembled in accordance with catalog instructions, and use properly selected and handled high-quality tubing.Conversions19Decimal EquivalentsSwagelok—TM Swagelok Company©1999, 2003 Swagelok CompanyPrinted in U.S.A., GLLMarch 2003, R2MS-13-43。
