Tolerance stack-up in machined interfaces between motor frames, gearboxes, and their driven shafts will normally result in slight misalignment in the lateral and angular directions. While most motor mounting brackets allow for sufficient alignment to work with standard bellows couplings, occasionally a given machine layout will require high performance couplings to accommodate more than a few thousandths of an inch of shaft offset. For this purpose R+W has recently released a special series of double flex bellows couplings for higher misalignment.

The BKL-DOUBLEFLEX allows for a multiplication of lateral misalignment tolerance by taking advantage of the greater flexibility in the angular direction of each bellows. Compared to its single-flex counterparts, the BKL-DOUBLEFLEX allows for up to 5 times more lateral misalignment depending on the size. Compared to other types of dual-flexture couplings, this new series possesses a very high level of torsional stiffness with zero backlash, and a low moment of inertia, making it ideal for servo drives in packaging equipment and special machinery.

The BKL-DOUBLEFLEX series is currently available in torque ratings from 15 – 500 Nm (132– 4425 in-lbs.) and can accept English or metric shafts from 8 – 62 mm (5/16" – 2-5/16" in.). Special miniature versions are also available for troublesome encoder coupling installations.

For more information or a datasheet, contact R+W America at (888)479-8728 or info@rw-america.com.