You searched for "parallel misalignment"
KTR
KTR Gear Coupling, 58mm Outside Diameter, 38mm Bore Coupler
Part: BOWEXM38-HUB-PB
Gear coupling for controlled power transmission between moderately misaligned shafts.
KTR
KTR Gear Coupling, 36mm Outside Diameter, 24mm Bore Coupler
Part: BOWEXM24-COMPLETE
Heavy-duty gear coupling transmits high torque between parallel shafts.