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[cite: 24]. Featuring a fail-safe design with conical buffer pins mounted in spherical flexible elastomer bushes[cite: 24], the RUPEX RWN 360 delivers a nominal torque capacity of 13,200 Nm (peak torque up to 33,000 Nm)[cite: 24]. Covering 25 frame sizes from size 105 to 2000 (200 Nm to 1,300,000 Nm)[cite: 24], 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)[cite: 24]. They are extensively specified across heavy cranes, cement ball mills, mine hoists, bucket wheel excavators, crushers, and marine winch drives[cite: 24].
Technical Specifications
| Model / Part Number | RUPEX RWN 360 (Type RWN, Size 360 Heavy Duty)[cite: 24] |
|---|---|
| Brand / Manufacturer | Flender GmbH[cite: 24] |
| Structural Execution | Type RWN (Cast iron / steel standard pin and bush design)[cite: 24] |
| Nominal Torque Output | 13,200 Nm (Size 360) / 200 Nm to 1,300,000 Nm (Full Series Range)[cite: 24] |
| Buffer Pin Elements | Ground conical steel pins with spherical NBR 80 Shore A or TPU flexible bushes[cite: 24] |
| Operating Temperature | -50°C to +100°C (Depending on elastomer grade selected)[cite: 24] |
| ATEX Certification | Certified according to 2014/34/EU Directive for explosive atmospheres (Zone 1/21 & 2/22)[cite: 24] |
| Overload Behavior | Fail-safe operation (Transmits torque safely under extreme overload)[cite: 24] |
Documentation & Resources
Flender RUPEX Series Modular Architecture Matrix
Full-range structural configuration guide for Flender RUPEX heavy-duty flexible pin and bush couplings[cite: 24]. 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)[cite: 24] | Size 105 to Size 1000 (19 Sizes)[cite: 24] | 200 Nm - 240,000 Nm[cite: 24] | Standard Heavy Duty (Universal industrial drives)[cite: 24] |
| RUPEX Type RWS (All-Steel High-Speed)[cite: 24] | Size 144 to Size 2000 (23 Sizes)[cite: 24] | 1,000 Nm - 1,300,000 Nm[cite: 24] | High-Speed Steel (Turbines, mills & heavy hoists)[cite: 24] |
| RUPEX Type RWB / RBS (With Brake Disc)[cite: 24] | Size 160 to Size 1000 (16 Sizes)[cite: 24] | 1,600 Nm - 240,000 Nm[cite: 24] | Brake Disc Integration (Crane hoist & winch brakes)[cite: 24] |
| RUPEX Type RWD (With Brake Drum)[cite: 24] | Size 144 to Size 630 (13 Sizes)[cite: 24] | 1,000 Nm - 63,000 Nm[cite: 24] | Brake Drum Integration (Shoe brake systems)[cite: 24] |
| RUPEX Type RWT (Shear Pin Protection)[cite: 24] | Size 198 to Size 800 (13 Sizes)[cite: 24] | 2,700 Nm - 160,000 Nm[cite: 24] | Overload Shear Pin (Isolates drive upon jam)[cite: 24] |
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[cite: 24]. 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[cite: 24] | Pin & Bush Elastomer[cite: 24] | RUPEX Type RWN 360 Current Standard[cite: 24] | 13,200 Nm[cite: 24] | Direct 1-to-1 hub dimensions & pin pitch circle match[cite: 24]. |
| Legacy Heavy Pin Couplings[cite: 24] | Straight Pin & Bush[cite: 24] | RUPEX Type RWN 250 / 315 / 360 Conical Pin[cite: 24] | 5,000 Nm - 13,200 Nm[cite: 24] | Conical buffer pins eliminate pin backlash and reduce wear[cite: 24]. |
| Rigid Flange / Gear Couplings[cite: 24] | Toothed Gear Sleeve[cite: 24] | RUPEX Type RWS 360 / 450 / 560 Shock-Damping[cite: 24] | 13,200 Nm - 50,000 Nm[cite: 24] | Damps heavy shock loads in ball mills and crushers[cite: 24]. |
| Heavy Mine Hoist Drives[cite: 24] | Pin Coupling with Brake[cite: 24] | RUPEX Type RBS 360 / 450 + Brake Steel Brake[cite: 24] | 13,200 Nm - 25,000 Nm[cite: 24] | High-speed steel execution with integrated caliper brake disc[cite: 24]. |
| Jammed Drive Overload Duty[cite: 24] | Standard Pin Coupling[cite: 24] | RUPEX Type RWT 360 Shear Pin Overload Protection[cite: 24] | 13,200 Nm[cite: 24] | Precise shear pin calibration protects expensive speed reducers[cite: 24]. |
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[cite: 24]. 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[cite: 24].
Core Benchmark Model Standard Configurations
- RUPEX Type RWN 198[cite: 24]
- RUPEX Type RWN 224[cite: 24]
- RUPEX Type RWN 250[cite: 24]
- RUPEX Type RWN 280[cite: 24]
- RUPEX Type RWN 315[cite: 24]
- RUPEX Type RWN 360[cite: 24]
- RUPEX Type RWN 400[cite: 24]
- RUPEX Type RWN 450[cite: 24]
- RUPEX Type RWN 500[cite: 24]
- RUPEX Type RWS 360 (Steel)[cite: 24]
- RUPEX Type RWS 450 (Steel)[cite: 24]
- RUPEX Type RWS 560 (Steel)[cite: 24]
- RUPEX Type RWB 360 (Brake Disc)[cite: 24]
- RUPEX Type RBS 360 (Steel Brake)[cite: 24]
- RUPEX Type RWD 360 (Brake Drum)[cite: 24]
- RUPEX Type RWT 360 (Shear Pin)[cite: 24]
- RUPEX Buffer Pins Size 360 (NBR)[cite: 24]
- RUPEX Buffer Pins Size 400 (NBR)[cite: 24]
- RUPEX TPU High-Impact Bushes[cite: 24]
- RUPEX Reamed Fitted Pin Sets[cite: 24]
