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Ruland

RulandCarefully Made Shaft Collars and CouplingsBeLLOWS couplings


IntroductionRuland Manufacturing Co., Inc. has been supplying carefullymade products since 1937. We have manufactured everythingfrom bicycle pumps to high pressure valves, including the valvethat pressurized the spacesuit of the first American to walk inspace. In recent years, all of our expertise has been devoted tomaking the best shaft collars and couplings available. Bellowscouplings are just one design in the full line of motion controlcouplings manufactured by Ruland (see back cover).Bellows couplings are an assembly of two aluminum hubs anda uniform, thin walled stainless steel bellows. The use ofaluminum hubs with a bellows results in a coupling with verylow inertia, a feature that is very important in today’s highlyresponsive systems. The characteristics of bellows make theman ideal method for transmitting torque in motion controlapplications. The bellows allow the coupling to bend easilyunder loads caused by the three basic types of misalignmentbetween shafts (angular, parallel, axial motion). Because theyhave uniform, thin walls, the bellows provide low bearing loadsthat remain constant at all points of rotation, without thedamaging cyclical high and low loading points found in someother types of couplings. All of this is accomplished whileremaining rigid under torsional loads. Torsional rigidity is a keyfactor in determining the accuracy of the coupling. The stifferthe coupling, the more accurately motion is translated from themotor to the driven component. Among servo couplings,bellows type couplings are one of the stiffest available, makingthem ideal in high performance applications that require a highdegree of accuracy and repeatability.WARRANTY / DISCLAIMER OF UNSTATED WARRANTIES / LIMITATION OF LIABILITYWarranty. Ruland warranties that the products sold hereunder meet Ruland’s size and materials specifications asset forth in this catalog. Products not meeting Ruland’s size and material specifications will, at Ruland’s option,be replaced or the purchase price refunded.Disclaimer of unstated warranties. THE WARRANTY PRINTED ABOVE IS THE ONLY WARRANTY APPLICABLE TOTHESE PRODUCTS. ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THEIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. It isthe responsibility of the user to determine the suitability of Ruland products for a specific application. No person,including employees of Ruland or agents in the company’s channels of distribution is authorized to represent onRuland’s behalf, the suitability of Ruland products for a specific purpose.Limitation of Liability. IT IS UNDERSTOOD AND AGREED THAT SELLER’S LIABILITY SHALL NOT EXCEED THEAMOUNT OF THE PURCHASE PRICE. SELLER SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIALDAMAGES. THE PRICE STATED FOR THE PRODUCT IS A CONSIDERATION IN LIMITING RULAND’S LIABILITY.2


cBSSTAINLESS STEEL BELLOWS cOUPLINGInch DIMENSION SERIESpart numberclampstyleBC10BC12BC16BC21BC26BC32Set ScrewstyleBS10BS12BS16BS21BS26BS32Specificationsbore 1 (in)2 (.125)3 (.188)4 (.250)3 (.188)4 (.250)5 (.313)4 (.250)5 (.313)6 (.375)8 (.500)5 (.313)6 (.375)8 (.500)10 (.625)6 (.375)8 (.500)10 (.625)12 (.750)8 (.500)10 (.625)12 (.750)14 (.875)16 (1.000)bore 2 (in)2 (.125)3 (.188)4 (.250)3 (.188)4 (.250)5 (.313)4 (.250)5 (.313)6 (.375)8 (.500)5 (.313)6 (.375)8 (.500)10 (.625)6 (.375)8 (.500)10 (.625)12 (.750)8 (.500)10 (.625)12 (.750)14 (.875)16 (1.000)OuterDiam.Od (in).590.7501.0001.3131.6252.000LengthL (in)11 3 ⁄161 5 ⁄161 9 ⁄1622 5 ⁄16ClampScrewM2M2.5M3M3M4M5SetScrewM3M3M4M4M5M6hubwidthl1 (in).340.410.467.590.710.810StaticTorque(lb-in)224060120250400TorsionalStiffness(lb-in/Deg)72120244400550950AngularMisalignment(Deg)1.501.501.501.502.002.00ParallelMisalignment(in).004.004.004.006.010.010AxialMotion(in).008.010.012.016.020.020Ordering InformationChoose any bore b1 and any bore b2 availablein a body size. Part numbers are in the followingformat with numbers representing inches:3/4" OD 3/16" BoreBC 12–4–3–AClamp Style 1/4" Bore Aluminum HubsNote 1 Static torque ratings are at maximum misalignment. To obtain dynamic rating, static ratings should be divided by2 for non-reversing applications and by 4 for reversing applications.Note 2 Hardware is alloy steel with black oxide finish. Parts BS10, BS12, MBS15 and MBS19 have one set screw oneach end. BS16, BS21, BS26, BS32, MBS25, MBS33, MBS41 and MBS51 have two set screws 90° apart.Note 3 Performance ratings are for guidance only. The user must determine suitability for a particular application.Note 4 Couplings supplied with aluminum hubs. Stainless steel hubs available upon request.For engineering information, see page 5. For warranty information, see page 2.3www.ruland.com • Phone (508) 485-1000 • Fax (508) 485-9000 • sales@ruland.com


STAINLESS STEEL BELLOWS COUPLINGMETRIC DIMENSION SERIESmBCmBSpart numberclampstyleMBC15MBC19MBC25MBC33MBC41MBC51Set ScrewstyleMBS15MBS19MBS25MBS33MBS41MBS51Specificationsbore1 (mm)3456456868101281012141516101214151620121415162025bore2 (mm)3456456868101281012141516101214151620121415162025OuterDiam.Od (mm)151925334151LengthL (mm)253033405159ClampScrewM2M2.5M3M3M4M5SetScrewM3M3M4M4M5M6hubwidthl1 (mm)8.6510.4011.8515.0018.0520.55StaticTorque(Nm)2.54.56.813.628.045.2TorsionalStiffness(Nm/Deg)814274563108AngularMisalignment(Deg)1.501.501.501.502.002.00ParallelMisalignment(mm)0.100.100.100.150.250.25AxialMotion(mm)0.200.250.300.400.500.50Ordering InformationChoose any bore b1 and any bore b2 availablein a body size. Part numbers are in the followingformat with numbers representing metrics:19mm ODMBC 19–6–5–A5mm BoreClamp Style 6mm Bore Aluminum HubsNote 1 Static torque ratings are at maximum misalignment. To obtain dynamic rating, static ratings should be divided by2 for non-reversing applications and by 4 for reversing applications.Note 2 Hardware is alloy steel with black oxide finish. Parts BS10, BS12, MBS15 and MBS19 have one set screw oneach end. BS16, BS21, BS26, BS32, MBS25, MBS33, MBS41 and MBS51 have two set screws 90° apart.Note 3 Performance ratings are for guidance only. The user must determine suitability for a particular application.Note 4 Couplings supplied with aluminum hubs. Stainless steel hubs available upon request.For engineering information, see page 5. For warranty information, see page 2.4www.ruland.com • Phone (508) 485-1000 • Fax (508) 485-9000 • sales@ruland.com

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