| 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 | 100 | 46.40 | 0.49 | 69.6 | 0.73 | 116 | 1.2 | - | 35 | 78 | 65 | 35 | 57 | 2 | 27 | 140 | 88 |
The RRS 100 is a high-performance "Radially Removable Spacer" (RRS) coupling designed for industrial applications that require a significantly larger gap between shaft ends. While it shares the same torque ratings as the size 99, the RRS 100 is specifically engineered with an extended 140 mm Distance Between Shaft Ends (DBSE). This makes it the ideal choice for larger pump assemblies or specialized machinery where extra clearance is required for maintenance access.
The RRS 100 provides the same robust power transmission as the 99 model but offers a larger physical footprint and bore capacity:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 46.40 Nm |
| Rated Torque (Polyurethane) | 69.6 Nm |
| Power Rating @ 100 RPM | 0.49 kW (Rubber) / 0.73 kW (PU) |
| Maximum Bore Capacity (D) | 35 mm |
| Outside Diameter (ØA) | 78 mm |
| Distance Between Shaft Ends (DBSE) | 140 mm |
| Overall Length (TL1) | 88 mm |
The RRS 100 functions as a three-piece assembly designed for "drop-out" maintenance:
Extended Bridging: The coupling features a center spacer that spans a 140 mm gap. This extra 40 mm compared to the RRS 99 allows for the removal of larger mechanical seals or more complex bearing housings.
Torsional Flexibility: Power is transmitted through an elastomeric spider. This element absorbs shock loads and handles both angular and parallel misalignment.
Radial Maintenance: By loosening the retaining ring and screws, the center spacer section can be lifted out radially (sideways). This allows the pump's rotating element to be removed without unbolting the motor from its base.
Maximum Clearance: The 140 mm DBSE provides superior "hand room" for technicians working on pump internals.
Larger Bore Capacity: With a 35 mm maximum bore, it can accommodate slightly larger motor shafts than the RRS 99.
Simplified Re-alignment: Because the hubs remain fixed on the shafts during maintenance, there is no need to perform a full laser alignment after every seal change.
Fail-Safe Reliability: The interlocking metal jaws provide a secondary drive path, ensuring the system can be shut down safely even if the elastomer fails.
H-Trans Compatibility: For applications requiring even more power, using an H-Trans element increases the torque capacity to 116 Nm.
The RRS 100 is typically found in heavy-duty fluid handling and industrial processing:
Large Process Pumps: Ideal for pumps that have larger seal chambers requiring extra clearance.
Industrial Agitators: Used where the motor is mounted at a distance from the mixing vessel.
Cooling Tower Fans: Spanning the distance between the motor and the gearbox in tight plenum spaces.
Petrochemical Refining: Used in critical pump lines where fast maintenance turnaround is a priority.
The RRS 100 is the preferred choice when an industry-standard 100 mm gap isn't enough. By offering a 140 mm DBSE and a 35 mm bore capacity, it provides the same reliable power transmission as the rest of the series while maximizing maintenance accessibility. It is the perfect blend of high torque density and user-friendly design.
