Ruland SPC-16-12-F Two-Piece Clamping Rigid Coupling with Keyway, Black Oxide Steel, 1" Bore A Diameter, 3/4" Bore B Diameter, 1-3/4" OD, 3" Length, 1/4" x 3/16" Keyway Width

Rigid Shaft Coupling, Two Piece Clamp Type, With Keyway, Bore Dia 1 x 3/4 In, Overall Length 3 In, Outside Dia 1 3/4 In, Clearance Dia 2.049 In, Screw Size 1/4-28 In, Keyway Width 1/4 x 3/16 In, Max Torque 4000 In-Lb, Black Oxide Steel 2-Pc. Clamp-Style Rigid CouplingsFor applications in which alignment is critical, no backlash is desired, and flexibility is not required. Wrap around hard or soft shafts without marring; easy to install without having to disassemble machinery or components. Max. rpm: 4000. Utilize 8 vibration-resistant socket cap screws. Black oxide-coated steel couplings have alloy screws; stainless steel couplings have stainless steel screws. Ruland brand has opposing Nypatch antivibration hardware and honed straight bores for increased accuracy.