| 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 | 226 | 327 | 3.4 | 490.5 | 5.1 | 817.5 | 8.6 | 25 | 70 | 153 | 137 | 70 | 119 | 3 | 51 | - | 178 |
The RRS 226 represents a specialized high-torque variant within the Radially Removable Spacer (RRS) series. It is engineered for industrial applications that require a robust connection and significant power transmission but do not require the extreme 180 mm gap of the 225 model. With a focus on stability and high torque density, the RRS 226 is a critical component for large-scale pumps and machinery where "back pull-out" maintenance is the standard operating procedure.
The RRS 226 provides a substantial increase in torque and power rating over previous models, handling larger motor outputs with ease:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 327 Nm |
| Rated Torque (Polyurethane) | 490.5 Nm |
| Rated Torque (H-Trans) | 817.5 Nm |
| Power Rating @ 100 RPM | 3.4 kW (Rubber) / 5.1 kW (PU) |
| Maximum Bore Capacity (D) | 70 mm |
| Outside Diameter (ØA) | 153 mm |
| Overall Length (TL1) | 178 mm |
| Pilot Drill Size | 25 mm |
The RRS 226 operates as a torsionally flexible spacer coupling designed for radial serviceability:
Direct Power Transfer: Torque is transmitted from the driving hub to the driven hub through a high-performance elastomeric element.
Compression-Type Design: The "jaws" of the coupling hubs compress the legs of the elastomer, which dampens shock loads and accommodates shaft misalignment.
The "Drop-Out" Advantage: The RRS design allows the center spacer and the flexible element to be removed radially (sideways). This means you can access pump seals or bearings without unbolting or moving the heavy motor from its foundation.
Exceptional Torque Capacity: Capable of handling up to 817.5 Nm with an H-Trans element, making it suitable for high-horsepower industrial drives.
Large Shaft Support: A 70 mm maximum bore capacity allows it to fit onto the larger shafts of high-frame-size industrial motors.
Maintenance Efficiency: By allowing the spacer to "drop out," it eliminates the need for time-consuming re-alignments after routine pump maintenance.
Fail-Safe Integrity: The interlocking jaw design ensures that if the elastomer fails, the metal jaws will remain engaged to allow a safe, controlled shutdown of the equipment.
No Lubrication Required: The dry elastomeric design is perfect for harsh environments where grease would attract abrasive dust or contaminants.
The RRS 226 is built for heavy-duty, high-uptime industrial sectors:
Large Centrifugal Pumps: Ideal for municipal water transport and chemical processing plants.
Industrial Agitators: Used in mixing tanks where the motor must be easily disconnected from the shaft.
Heavy-Duty Fans & Blowers: Managing high-inertia rotational loads in ventilation systems.
Gearbox Inputs: Acting as a protective, flexible link between large motors and industrial reducers.
The RRS 226 is a heavy-duty solution for engineers who need maximum torque in a manageable footprint. With a 70 mm bore and a power rating of 8.6 kW @ 100 RPM (using H-Trans), it provides the strength of a much larger coupling while maintaining the ease of maintenance provided by the "Snap Wrap" and "RRS" systems.
