| Coupling | Synthetic Rubber | Polyurethane | H-Trans | Pilot Drill Size | Max. Bore D | ØA | Length thru' Bore L1 | ØB | Gap G | ØE | DBSE | Overall Length TL1 | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Size | Rated Torque (Nm) | kW @ 100 rpm | Rated Torque (Nm) | kW @ 100 rpm | Rated Torque (Nm) | kW @ 100 rpm | SW/RRS | L | ||||||||
| RRS | 95 | 21.10 | 0.22 | 31.7 | 0.33 | 52.8 | 0.55 | - | 28 | 65 | 54 | 25 | 49 | 2 | 19 | 90 | 63 |
The RRS 95 is a specialized "Radially Removable Spacer" (RRS) coupling designed for applications where the distance between shaft ends (DBSE) is significant. Part of the flexible jaw coupling family, the RRS 95 is engineered to bridge larger gaps—specifically 90 mm—while allowing for the easy removal of the center spacer. This is a critical feature for pump applications, as it allows for the servicing of pump seals and bearings without disturbing the motor or the piping.
The RRS 95 balances compact design with industrial-strength performance:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 21.10 Nm |
| Rated Torque (Polyurethane) | 31.7 Nm |
| Power Rating @ 100 RPM | 0.22 kW (Rubber) / 0.33 kW (PU) |
| Maximum Bore Capacity (D) | 28 mm |
| Outside Diameter (ØA) | 65 mm |
| Distance Between Shaft Ends (DBSE) | 90 mm |
| Overall Length (TL1) | 63 mm |
The RRS 95 operates on the standard jaw coupling principle but introduces a "spacer" element:
Spacer Hub Assembly: The coupling consists of two standard hubs mounted on the shafts and a center spacer assembly that fits between them.
Flexible Transmission: Torque is transmitted through a flexible elastomer spider. In the RRS configuration, the spacer provides the necessary length to span the 90 mm gap.
Radial Removal: The "RRS" designation means the entire center section (spacer and element) can be removed radially. By loosening the assembly, the spacer "drops out," providing clear access to the driven equipment's face.
Pump-Friendly Maintenance: Specifically designed for "back pull-out" pumps. It allows maintenance teams to replace mechanical seals without moving the motor.
Standardized DBSE: The 90 mm DBSE is a common industry standard, making the RRS 95 a versatile drop-in replacement for many pump drive systems.
Misalignment Protection: Effectively handles angular, parallel, and axial misalignments, which are common in long-coupled systems.
Chemical Resistance: When used with a Polyurethane element, the coupling offers excellent resistance to oil and chemicals often found in industrial environments.
Fail-Safe Design: Even if the elastomer fails, the jaw structure remains engaged, preventing a runaway load until the system can be safely shut down.
The RRS 95 is predominantly used in fluid handling and light-to-medium industrial drives:
Centrifugal Pumps: Perfect for standard chemical and water pumps.
Fans and Blowers: Used where the motor and fan are separated to avoid heat transfer or for easier access.
Compressors: Spanning the gap between the prime mover and the compression unit.
Process Machinery: Anywhere a defined distance between shafts is required for maintenance access.
The RRS 95 is a precision-engineered solution for "spacer-style" power transmission. With its 28 mm maximum bore and 90 mm DBSE, it provides the ideal balance of flexibility and accessibility. It is the go-to choice for maintenance-focused engineers who need a reliable, fail-safe coupling that simplifies pump repairs.
