Flender N-EUPEX Type A 160 Flexible Pin Coupling
The Flender N-EUPEX Type A 160 is the world's most widely specified three-part flexible pin and bush elastomer coupling for industrial power transmission[cite: 22]. Engineered to compensate for shaft misalignments (angular, radial, and axial) while effectively damping torsional vibrations and shock loads[cite: 22], the Type A three-part design allows replacement of flexible elastomer packets without moving the driven or driving machinery[cite: 22]. Available in 23 standard sizes (size 58 to 710) covering nominal torques from 19 Nm to 85,000 Nm[cite: 22], N-EUPEX couplings feature fail-safe cast iron construction with flexible NBR or TPU packets[cite: 22], and are widely specified across pump drives, fan drives, belt conveyors, compressors, mill drives, and crane machinery[cite: 22].
Technical Specifications
| Model / Part Number | N-EUPEX Type A 160 (Three-part design, Size 160 Frame)[cite: 22] |
|---|---|
| Brand / Manufacturer | Flender GmbH[cite: 22] |
| Structural Execution | Type A (Three-part fail-safe pin & bush layout for easy bush replacement)[cite: 22] |
| Nominal Torque Output | 1,050 Nm (Size 160) / 19 Nm to 85,000 Nm (Full Series Range)[cite: 22] |
| Elastomer Packets | Flexible NBR 80 Shore A (Standard), NBR 90 Shore A, or High-Temp TPU Packets[cite: 22] |
| Operating Temperature | -50°C to +100°C (Depending on elastomer grade selected)[cite: 22] |
| ATEX Certification | Certified according to 2014/34/EU Directive for explosive atmospheres (Zone 1/21 & 2/22)[cite: 22] |
| Overload Behavior | Fail-safe design (Caws transmit torque even if elastomer wears out)[cite: 22] |
Documentation & Resources
Flender N-EUPEX Series Modular Architecture Matrix
Full-range structural configuration guide for Flender N-EUPEX and N-EUPEX DS flexible pin and bush couplings[cite: 22]. Review supported execution types, brake attachments, pump spacer options, and overload protection:
| Coupling Type & Structural Execution | Frame Sizes Covered | Nominal Torque Rating (Nm) | Key Operational Advantages & Applications |
|---|---|---|---|
| N-EUPEX Type A (Three-Part Fail-Safe)[cite: 22] | Size 110 to Size 710 (17 Sizes)[cite: 22] | 380 Nm - 85,000 Nm[cite: 22] | Easy Maintenance (Bushes replaced without unbolting motor)[cite: 22] |
| N-EUPEX Type B (Two-Part Fail-Safe)[cite: 22] | Size 58 to Size 710 (21 Sizes)[cite: 22] | 19 Nm - 85,000 Nm[cite: 22] | Compact Standard (Shortest DBSE for space savings)[cite: 22] |
| N-EUPEX Type D / E (Brake Disc / Drum)[cite: 22] | Size 80 to Size 710 (17 Sizes)[cite: 22] | 60 Nm - 85,000 Nm[cite: 22] | Brake Integration (Attached brake disc or drum for hoists)[cite: 22] |
| N-EUPEX Type H / P (Pump Spacer Sleeves)[cite: 22] | Size 110 to Size 315 (10 Sizes)[cite: 22] | 380 Nm - 15,000 Nm[cite: 22] | ANSI/ISO Pump Spacer (Allows pump seal maintenance)[cite: 22] |
| N-EUPEX DS Series (Non-Fail-Safe)[cite: 22] | Size 68 to Size 250 (11 Sizes)[cite: 22] | 34 Nm - 8,000 Nm[cite: 22] | Non-Fail-Safe (Isolates motor upon elastomer breakdown)[cite: 22] |
Legacy Pin Coupling Replacement & N-EUPEX Upgrade Guide
Worn EUPEX or non-standard flexible pin couplings installed on pumps, fans, and gearboxes can be directly replaced with current Flender N-EUPEX couplings[cite: 22]. Refer to the replacement mapping below for 1-to-1 retrofitting:
| Legacy Coupling Series / Type | Coupling Mechanism | Current N-EUPEX Equivalent Model | Torque Capacity | Mechanical Fit & Retrofit Engineering Notes |
|---|---|---|---|---|
| Legacy EUPEX Size 160 Type A[cite: 22] | Pin & Bush Elastomer[cite: 22] | N-EUPEX Type A 160 Current Standard[cite: 22] | 1,050 Nm[cite: 22] | Direct 1-to-1 hub diameter & bolt pattern match. Uses standard N-EUPEX packets[cite: 22]. |
| Legacy EUPEX Size 160 Type B[cite: 22] | Pin & Bush Elastomer[cite: 22] | N-EUPEX Type B 160 Current Standard[cite: 22] | 1,050 Nm[cite: 22] | Two-part compact design. Identical shaft insertion depth[cite: 22]. |
| Standard Jaw / Spider Couplings[cite: 22] | Elastomer Spider[cite: 22] | N-EUPEX Type B 110 / 140 / 160 Heavy Duty[cite: 22] | 380 Nm - 1,050 Nm[cite: 22] | Replaces fragile spiders with durable NBR multi-bushes[cite: 22]. |
| ISO / ANSI Process Pump Couplings[cite: 22] | Pin & Bush Spacer[cite: 22] | N-EUPEX Type H / Type P Spacer Pump Duty[cite: 22] | 380 Nm - 15,000 Nm[cite: 22] | Standard DBSE spacer lengths (100mm, 140mm, 180mm, 250mm)[cite: 22]. |
| Overload Isolation Applications[cite: 22] | Fail-Safe Bushing[cite: 22] | N-EUPEX DS Type A / Type B Non-Fail-Safe[cite: 22] | 34 Nm - 8,000 Nm[cite: 22] | Breaks mechanical link upon element destruction to protect machinery[cite: 22]. |
Expert Selection & Retrofit Engineering Notes
When servicing existing installations featuring worn elastomer bushes, we stock genuine Flender N-EUPEX flexible packets in standard NBR 80 Shore A, high-load NBR 90 Shore A, and high-temperature TPU grades[cite: 22]. 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: 22].
Core Benchmark Model Standard Configurations
- N-EUPEX Type A 110[cite: 22]
- N-EUPEX Type A 140[cite: 22]
- N-EUPEX Type A 160[cite: 22]
- N-EUPEX Type A 180[cite: 22]
- N-EUPEX Type A 200[cite: 22]
- N-EUPEX Type A 225[cite: 22]
- N-EUPEX Type B 80[cite: 22]
- N-EUPEX Type B 95[cite: 22]
- N-EUPEX Type B 110[cite: 22]
- N-EUPEX Type B 140[cite: 22]
- N-EUPEX Type B 160[cite: 22]
- N-EUPEX Type B 200[cite: 22]
- N-EUPEX Type D 160 (Brake Disc)[cite: 22]
- N-EUPEX Type E 160 (Brake Drum)[cite: 22]
- N-EUPEX Type H 140 (Pump Spacer)[cite: 22]
- N-EUPEX Type P 160 (Pump Sleeve)[cite: 22]
- N-EUPEX DS Type A 160[cite: 22]
- N-EUPEX Packets Size 160 (NBR 80)[cite: 22]
- N-EUPEX Packets Size 200 (NBR 80)[cite: 22]
- N-EUPEX TPU High-Temp Packets[cite: 22]
