You searched for "parallel bore"
Ruland
Ruland Beam Coupling, 19mm Outside Diameter, 5mm Bore, 22.9mm Length Coupler
Part: PSMR19-5-5-A
Small precision beam coupling for light machinery and servo motor applications.
Ruland
Ruland Beam Coupling, 19mm Outside Diameter, 5mm Bore, 22.9mm Length Coupler
Part: PCMR19-5-5-A
Compact precision beam coupling for small motor and instrument shaft connections.
Ruland
Ruland Beam Coupling, 19mm Outside Diameter, 4mm Bore, 22.9mm Length Coupler
Part: PCMR19-4-4-A
Lightweight aluminium beam coupling for small precision machinery and light-duty applications.
Ruland
Ruland Beam Coupling, 19mm Outside Diameter, 4mm Bore, 22.9mm Length Coupler
Part: PSMR19-4-4-A
Small precision beam coupler connecting rotating shafts with high misalignment tolerance.