| 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 | 225 | 265 | 2.8 | 397.5 | 4.2 | 662.5 | 6.9 | - | 65 | 142 | 127 | 64 | 111 | 3 | 45 | 180 | 153 |
The RRS 225 is the largest "Radially Removable Spacer" (RRS) coupling in the standard series, specifically engineered for massive industrial equipment. It is designed to bridge a substantial 180 mm Distance Between Shaft Ends (DBSE), providing maximum clearance for heavy-duty "back pull-out" pump maintenance. For engineers and maintenance managers, the RRS 225 is the ultimate solution for large-scale power transmission where machine uptime and easy serviceability are the highest priorities.
The RRS 225 offers the highest torque and physical dimensions in the spacer lineup:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 265 Nm |
| Rated Torque (Polyurethane) | 397.5 Nm |
| Rated Torque (H-Trans) | 662.5 Nm |
| Power Rating @ 100 RPM | 2.8 kW (Rubber) / 4.2 kW (PU) |
| Maximum Bore Capacity (D) | 65 mm |
| Outside Diameter (ØA) | 142 mm |
| Distance Between Shaft Ends (DBSE) | 180 mm |
| Overall Length (TL1) | 153 mm |
The RRS 225 utilizes a specialized three-piece "drop-out" architecture:
Maximum Bridging: It spans a 180 mm gap, the widest standard DBSE in the series. This allows for the removal of very large mechanical seals and rotating elements from high-capacity pumps without disturbing the motor alignment.
Compression Transmission: Power is transferred through an elastomeric "Snap Wrap" spider. This element is compressed between the interlocking metal jaws of the hubs, absorbing immense shock loads.
Radial Disassembly: By sliding back the retaining ring and removing the fasteners, the entire center spacer assembly is removed radially (sideways). This leaves both the motor and the driven machine firmly bolted to their bases, saving hours of re-alignment labor.
Ultimate Maintenance Clearance: The 180 mm DBSE is ideal for massive industrial pumps that require significant space for internal servicing.
Large Shaft Compatibility: With a 65 mm maximum bore, it is designed to fit the shafts of large industrial motors used in mining, water treatment, and heavy manufacturing.
Unrivaled Torque Capacity: Using the H-Trans element allows this coupling to handle a staggering 662.5 Nm of torque.
Vibration Dampening: The heavy-duty elastomer effectively isolates the motor from the severe vibrations and shocks common in high-capacity fluid handling.
Fail-Safe Security: The rugged jaw design provides a mechanical backup; if the flexible element fails, the jaws stay engaged to allow for a controlled system shutdown.
The RRS 225 is built for the largest "back pull-out" systems in the industry:
High-Flow Municipal Pumps: Connecting massive water transport pumps to their drive motors.
Large-Scale Paper & Pulp Agitators: Used where the motor is set back significantly from the mixing vessel.
Industrial Cooling Towers: Spanning long distances between motors and gearboxes in large plenum chambers.
Mining Slurry Pumps: Handling thick, abrasive fluids while allowing for fast replacement of pump wear-parts.
The RRS 225 is the powerhouse of the spacer coupling world. By offering a 180 mm DBSE and a 65 mm bore, it meets the requirements of the heaviest industrial drive trains. It combines the extreme torque capacity of 662.5 Nm (with H-Trans) with the unparalleled maintenance convenience of the "Snap Wrap" system, making it the premier choice for critical infrastructure.
