Rexnord 91040903 is an Omega E30 elastomeric coupling with two HRB (ready bore) hubs. The E30 coupling size provides a continuous torque rating of 2,495 in-lb. The hubs are supplied with unmachined bores for customer finishing. This coupling accommodates misalignment and dampens vibration in power transmission applications.

Matched Hub/Sleeve Assembly No Element Material Standard Legacy Falk Bore Tol. - Hub 1 No Legacy Falk Bore Tol. - Hub 2 No Extended Storage Packaging No Coupling / Components Required Hub-1 (Hub) Only - No Oth Prts Product Type Omega Close Coupled Inch Coatings None (Standard) Torsionally Matched Element No High Speed Rings Required No Quantity of Sleeve Extensions None Hub Material Carbon Steel Hub1 Spec Set Screw TC08-022 Product Size 30 API-610 Hubs No. If required, contact Engin Hub2 Spec Set Screw TC08-022 Capscrew Material Carbon Steel VC Country of Origin China Hub-1 Bore Finish 125 Ra Microinch max (3.2 µm) Hub-1 Puller Hole Dimension Metric Hub-1 Bore Type Rough Bore (To Rex Standard) Hub-1 Keyway Type Square Key Hub-1 Bore Fit/Tolerance Clearance Hub-1 Keyway Finish 250 Ra Microinch max (6.3 µm) Hub-1 Quantity of Keyways 1 Keyway Hub-1 Keyway Radii 0.000000 Hub-1 Quantity of Setscrews One setscrew Hub-1 Nominal Bore/Shaft Metri Hub-1 Dimension Designation Inch (Imperial) Hub-1 Puller Hole None Hub-1 Keyway Size Keyway Standard Hub-1 Nominal Bore/Shaft Inch Hub-1 Key Fit AGMA Commercial (Inch) Hub-1 Setscrew Dimension Inch (Imperial) Hub-1 Bore Diameter Min Inch Hub-1 Bore Diameter Min Metric Hub-2 Bore Finish 125 Ra Microinch max (3.2 µm) Hub-2 Keyway Finish 250 Ra Microinch max (6.3 µm) Hub-2 Bore Diameter Min Metric Hub-2 Keyway Type Square Key Hub-2 Quantity of Setscrews One setscrew Hub-2 Nominal Bore/Shaft Metri Hub-2 Key Fit AGMA Commercial (Inch) Hub-2 Keyway Radii 0.000000 Hub-2 Puller Hole Dimension Metric Hub-2 Nominal Bore/Shaft Inch Hub-2 Bore Diameter Min Inch Hub-2 Quantity of Keyways 1 Keyway Hub-2 Bore Fit/Tolerance Clearance