| 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 | ||||||||
| SW | 2955 | 2132 | 22.3 | * 3198 | * 33.5 | - | - | 30 | 105 | 253 | 237 | 108 | 180 | 3 | 80 | - | 264 |
The SW 2955 is a high-capacity, heavy-duty industrial coupling within the "Snap Wrap" series. Positioned between the SW 295 and the SW 300 models, it is specifically designed to handle increased torque demands while retaining the maintenance-friendly features of a radially removable elastomer. This coupling serves as a critical link in large-scale rotating equipment, ensuring power is transmitted efficiently while protecting machinery from vibration and shock.
The SW 2955 offers a significant jump in performance compared to standard sizes, as detailed in the technical chart:
| Specification | Metric Value |
| Rated Torque (Synthetic Rubber) | 2132 Nm |
| Rated Torque (Polyurethane) | 3198 Nm |
| Power Rating @ 100 RPM | 22.3 kW (Rubber) / 33.5 kW (PU) |
| Maximum Bore Capacity (D) | 105 mm |
| Overall Length (TL1) | 264 mm |
| Outside Diameter (ØA) | 253 mm |
| Total Weight (Approx.) | 59 kg |
The SW 2955 utilizes a flexible jaw design combined with a "Snap Wrap" elastomeric element:
Direct Drive: Two cast-iron hubs (standard FG 260 grade) interlock their jaws around a central spider.
Radial Maintenance: The "SW" design features a wrap-around element held in place by an outer retaining ring and screws.
Torsional Damping: As the motor turns, the elastomer cushions the impact of torque spikes. Because the element is radially removable, you can replace the "wear part" by simply sliding back the retaining ring—no need to move the motor or the pump.
Maximum Uptime: Maintenance takes minutes rather than hours. The "Snap Wrap" system eliminates the need for expensive and time-consuming realignments after an element change.
High Torque Density: It provides a power-to-size ratio that supports heavy industrial motors (up to 33.5 kW per 100 RPM with Polyurethane).
Fail-Safe Reliability: Even if the elastomer fails due to extreme overload, the metal jaws will interlock to prevent a complete loss of drive, allowing for a controlled emergency shutdown.
Lubrication-Free: The dry design requires zero grease, making it ideal for clean environments or hard-to-reach locations.
Misalignment Tolerant: Accommodates up to $1^{\circ}$ of angular misalignment and $0.4\text{ mm}$ of parallel misalignment.
The SW 2955 is built for the "heavy" end of the industrial spectrum:
Heavy-Duty Pumps: Ideal for large centrifugal and reciprocating pumps in chemical or water treatment plants.
Conveyor Drives: Used in mining and bulk material handling where start-stop shock loads are frequent.
Industrial Fans & Blowers: Manages the high inertia of large-diameter fan blades.
Mixers and Agitators: Effectively handles the fluctuating torque loads common in chemical processing.
The SW 2955 is a premium industrial coupling that bridges the gap between standard duty and ultra-heavy-duty power transmission. With a 105 mm maximum bore and a robust 2132 Nm torque rating, it is the preferred choice for engineers who demand high performance without the high maintenance costs associated with traditional couplings.
