Flender RUPEX RWN 360 Flexible Pin & Bush Coupling
The Flender RUPEX RWN 360 is a heavy-duty, shock-damping flexible pin and bush coupling engineered for demanding industrial drive trains requiring high torque capacity, fail-safe reliability, and impact load absorption. Featuring a fail-safe design with conical buffer pins mounted in spherical flexible elastomer bushes, the RUPEX RWN 360 delivers a nominal torque capacity of 13,200 Nm (peak torque up to 33,000 Nm). Covering 25 frame sizes from size 105 to 2000 (200 Nm to 1,300,000 Nm), RUPEX couplings feature cast iron/steel standard designs (RWN), high-speed all-steel executions (RWS), integrated brake discs (RWB/RBS), brake drums (RWD), and shear-pin overload protection (RWT). They are extensively specified across heavy cranes, cement ball mills, mine hoists, bucket wheel excavators, crushers, and marine winch drives.
Technical Specifications
| Model / Part Number | RUPEX RWN 360 (Type RWN, Size 360 Heavy Duty) |
|---|---|
| Brand / Manufacturer | Flender GmbH |
| Structural Execution | Type RWN (Cast iron / steel standard pin and bush design) |
| Nominal Torque Output | 13,200 Nm (Size 360) / 200 Nm to 1,300,000 Nm (Full Series Range) |
| Buffer Pin Elements | Ground conical steel pins with spherical NBR 80 Shore A or TPU flexible bushes |
| Operating Temperature | -50°C to +100°C (Depending on elastomer grade selected) |
| ATEX Certification | Certified according to 2014/34/EU Directive for explosive atmospheres (Zone 1/21 & 2/22) |
| Overload Behavior | Fail-safe operation (Transmits torque safely under extreme overload) |
Documentation & Resources
Flender RUPEX Series Modular Architecture Matrix
Full-range structural configuration guide for Flender RUPEX heavy-duty flexible pin and bush couplings. Review supported execution types, brake attachments, high-speed steel designs, and overload protection:
| Coupling Type & Structural Execution | Frame Sizes Covered | Nominal Torque Rating (Nm) | Key Operational Advantages & Applications |
|---|---|---|---|
| RUPEX Type RWN (Standard Cast Iron/Steel) | Size 105 to Size 1000 (19 Sizes) | 200 Nm - 240,000 Nm | Standard Heavy Duty (Universal industrial drives) |
| RUPEX Type RWS (All-Steel High-Speed) | Size 144 to Size 2000 (23 Sizes) | 1,000 Nm - 1,300,000 Nm | High-Speed Steel (Turbines, mills & heavy hoists) |
| RUPEX Type RWB / RBS (With Brake Disc) | Size 160 to Size 1000 (16 Sizes) | 1,600 Nm - 240,000 Nm | Brake Disc Integration (Crane hoist & winch brakes) |
| RUPEX Type RWD (With Brake Drum) | Size 144 to Size 630 (13 Sizes) | 1,000 Nm - 63,000 Nm | Brake Drum Integration (Shoe brake systems) |
| RUPEX Type RWT (Shear Pin Protection) | Size 198 to Size 800 (13 Sizes) | 2,700 Nm - 160,000 Nm | Overload Shear Pin (Isolates drive upon jam) |
Legacy Pin Coupling Replacement & RUPEX Upgrade Guide
Worn pin and bush couplings or gear couplings on heavy crushers, mills, and cranes can be directly replaced with Flender RUPEX heavy-duty couplings. Refer to the replacement mapping below for 1-to-1 retrofitting:
| Legacy Coupling Series / Type | Coupling Mechanism | Current RUPEX Equivalent Model | Torque Capacity | Mechanical Fit & Retrofit Engineering Notes |
|---|---|---|---|---|
| Legacy RUPEX Size 360 Type RWN | Pin & Bush Elastomer | RUPEX Type RWN 360 Current Standard | 13,200 Nm | Direct 1-to-1 hub dimensions & pin pitch circle match. |
| Legacy Heavy Pin Couplings | Straight Pin & Bush | RUPEX Type RWN 250 / 315 / 360 Conical Pin | 5,000 Nm - 13,200 Nm | Conical buffer pins eliminate pin backlash and reduce wear. |
| Rigid Flange / Gear Couplings | Toothed Gear Sleeve | RUPEX Type RWS 360 / 450 / 560 Shock-Damping | 13,200 Nm - 50,000 Nm | Damps heavy shock loads in ball mills and crushers. |
| Heavy Mine Hoist Drives | Pin Coupling with Brake | RUPEX Type RBS 360 / 450 + Brake Steel Brake | 13,200 Nm - 25,000 Nm | High-speed steel execution with integrated caliper brake disc. |
| Jammed Drive Overload Duty | Standard Pin Coupling | RUPEX Type RWT 360 Shear Pin Overload Protection | 13,200 Nm | Precise shear pin calibration protects expensive speed reducers. |
Expert Selection & Retrofit Engineering Notes
When servicing existing installations featuring worn buffer pins, we stock genuine Flender RUPEX conical buffer pin assemblies and spherical bushes in standard NBR 80 Shore A and high-impact TPU materials. Simply supply us with your coupling size, bore diameters, and operating parameters, and our engineering team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- RUPEX Type RWN 198
- RUPEX Type RWN 224
- RUPEX Type RWN 250
- RUPEX Type RWN 280
- RUPEX Type RWN 315
- RUPEX Type RWN 360
- RUPEX Type RWN 400
- RUPEX Type RWN 450
- RUPEX Type RWN 500
- RUPEX Type RWS 360 (Steel)
- RUPEX Type RWS 450 (Steel)
- RUPEX Type RWS 560 (Steel)
- RUPEX Type RWB 360 (Brake Disc)
- RUPEX Type RBS 360 (Steel Brake)
- RUPEX Type RWD 360 (Brake Drum)
- RUPEX Type RWT 360 (Shear Pin)
- RUPEX Buffer Pins Size 360 (NBR)
- RUPEX Buffer Pins Size 400 (NBR)
- RUPEX TPU High-Impact Bushes
- RUPEX Reamed Fitted Pin Sets
