Ruland offers beam couplings and oldham couplings in miniature sizes suitable for micro component applications. Beam couplings are offered as standard parts in twenty different body sizes with outside diameters as small as 9mm (3/8") and bores as small as 3mm (3/32"). Oldham couplings are offered in seven sizes of set screw or clamp style hubs with outside diameters starting at 13mm (½") and bores starting at 3mm (1/8"). Common applications for miniature couplings include medical devices, test and measurement instruments, inspection equipment, small encoders, stepper motors, and tachometers.

Ruland beam couplings feature multiple spiral cuts to accommodate angular misalignment, parallel misalignment, and axial motion with modest bearing loads. The multiple cut pattern also provides for high torsional stiffness and higher torque capabilities when compared to single beam couplings. Oldham couplings are comprised of two aluminum hubs with drive tenons that mate with a floating center member. The couplings accommodate angular and axial misalignment, but are especially useful in applications where parallel misalignment is present. They offer zero backlash and high torque capacity.