Bell Mouth Strain Relief Bushings
Also referred to as bell‑mouth cable entry bushings or Heyco original strain relief, these precision‑engineered inserts are crafted from UL 94 V‑2 rated Nylon 6/6. They facilitate a smooth, protective "lazy‑bend" for cables exiting panels. By relieving tension and preventing sharp kinks, these bushings extend cable life in switchgear, control panels, machinery, appliance wiring, renewable energy systems, rail and marine installations throughout the UK. They absorb vibration, shock, and axial strain—rock‑solid protection for OEMs, installers and maintenance engineers seeking durable cable solutions. Vital Parts offers these as a cost‑effective alternative to snap‑in Lockit types, installed securely with pliers.
Available Materials & Style Options
- UL 94 V‑2 rated Nylon 6/6 – black
- Flat cable variants (for ribbon and twin cables)
- Round cable variants (for single‑core and flexi cable)
- Hole diameters from 1.6 mm up to approx. 16 mm
- Panel thickness compatibility: 1.6 mm and 3.2 mm
Key Features & Benefits:
- Flared bell‑mouth eases cable exit and prevents sharp bending—extends cable and product longevity
- Absorbs pull, push, twist and flex forces to protect cores
- Straight‑through design suits both flat and round cable types
- Operating temperature −18 °C to +105 °C—suitable for indoor/outdoor use
- UL Component recognised (E15331) and CSA certified (8919)
- Made from Nylon 6/6 for high chemical, wear and impact resistance
- Secure pliers‑fit for firm retention in thicker panels—cost‑effective over snap‑in variants
- Compatible with mounting hole plugs to blank unused holes in panels
Common UK Use Cases
- Securing signal, power and instrumentation cables in industrial control enclosures
- Strain relief on solar inverters, wind turbine junction boxes and other renewable‑energy panels
- Protecting cable exits in rail carriages, signalling racks and station equipment
- Marine switchboard and vessel control cabinet cable routing
- White‑goods and appliance wiring loom through‑panel protection
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