| 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 | 190 | 190 | 2.0 | 285 | 3.0 | 475 | 5.0 | - | 60 | 129 | 115 | 54 | 102 | 3 | 45 | 140 | 133 |
The RRS 190 is a high-capacity "Radially Removable Spacer" (RRS) coupling designed for heavy-duty industrial pump and fan drives. As a standout in the Snap Wrap family, the RRS 190 is specifically engineered to bridge a 140 mm Distance Between Shaft Ends (DBSE). This extended gap is essential for large "back pull-out" pumps, providing ample room for technicians to service mechanical seals and bearing housings without moving the motor or the piping.
The RRS 190 marks a transition into the larger industrial scale, offering massive torque and shaft capacity:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 190 Nm |
| Rated Torque (Polyurethane) | 285 Nm |
| Rated Torque (H-Trans) | 475 Nm |
| Power Rating @ 100 RPM | 2.0 kW (Rubber) / 3.0 kW (PU) |
| Maximum Bore Capacity (D) | 60 mm |
| Outside Diameter (ØA) | 129 mm |
| Distance Between Shaft Ends (DBSE) | 140 mm |
| Overall Length (TL1) | 133 mm |
The RRS 190 utilizes a modular three-piece design to maximize drive-train efficiency:
Extended Spacer Design: The center spacer bridges a 140 mm gap, which is the preferred standard for larger process pumps that require extra clearance for seal removal.
Compression Power: Torque is transmitted through a radially removable elastomer. This element is squeezed between the heavy-duty jaws of the hubs, providing a cushion for the drive system.
The "Drop-Out" Advantage: By simply loosening the retaining ring and bolts, the center spacer "drops out" radially. This allows the rotating element of the pump to be removed while the motor remains perfectly aligned on its base.
Optimized Maintenance Access: The 140 mm DBSE is specifically designed for larger pumps, making seal and bearing changes faster and safer.
Large Shaft Support: A 60 mm maximum bore allows this coupling to fit the high-horsepower motors typically found in chemical processing and water treatment.
Massive Torque Handling: When fitted with an H-Trans element, it can handle up to 475 Nm, allowing for a compact coupling footprint on powerful drives.
Vibration Dampening: The thick elastomeric material isolates the motor from the shocks and vibrations inherent in large fluid-handling systems.
Fail-Safe Security: Even if the flexible element is destroyed, the metal jaws remain interlocked, ensuring the drive stays connected until a controlled shutdown occurs.
The RRS 190 is the go-to choice for heavy-duty process environments:
Large ANSI/ISO Process Pumps: Ideal for hydrocarbon and chemical pumps with large seal chambers.
Municipal Water Pumps: Connecting massive motors to high-flow centrifugal pumps.
Cooling Tower Fans: Perfect for bridging the distance between the motor and the gearbox in large-scale cooling units.
Heavy-Duty Agitators: Used in pulp and paper or waste treatment where the motor is offset from the tank.
The RRS 190 is a powerhouse of serviceability. By combining a 60 mm bore with a generous 140 mm spacer, it eliminates the most common headaches in industrial maintenance. It offers the perfect balance of massive torque capacity (up to 475 Nm) and the convenience of the "Snap Wrap" system, ensuring your plant stays productive with minimal downtime.
