Bushings, Grommets

Part Number	Description / PDF	Quantity
87171222 Murrplastik	SMALL GROMMET KDT/Z 8-9MM RAN	380
87141756 Murrplastik	KDT/X-FDA 25 GROMMET 25-26 MM	120
87141712 Murrplastik	KDT/X-FDA 03 GROMMET 03-04 MM	144
87141754 Murrplastik	KDT/X-FDA 24 GROMMET 24-25MM	120
87171824 Murrplastik	SMALL GROMMET KDT/Z-EMC, 9-10MM	200
87141762 Murrplastik	KDT/X-FDA 28 GROMMET 28-29 MM	120
87121240 Murrplastik	LARGE GROMMET KDT/ZE 18-19MM	48
87141770 Murrplastik	BTK/X-FDA BLANK GROMMET SMALL	120
87141766 Murrplastik	BTG/X-FDA BLANK GROMMET MEDIUM	120
87171214 Murrplastik	SMALL GROMMET KDT/Z 4-5MM RAN	127
87171234 Murrplastik	SMALL GROMMET KDT/Z 14-15MM R	60
87141724 Murrplastik	KDT/X-FDA 09 GROMMET 09-10 MM	144
87121291 Murrplastik	SMALL GROMMET KDT/ZE 2X8MM OP	6
87171228 Murrplastik	SMALL GROMMET KDT/Z 11-12MM R	245
87121224 Murrplastik	SMALL GROMMET KDT/ZE 10-11MM	152
87141758 Murrplastik	KDT/X-FDA 26 GROMMET 26-27 MM	120
87171016 Murrplastik	CABLE ENTRY PLATE KDL, CUT-OUT S	106
87141240 Murrplastik	MEDIUM GROMMET KDT/X 17-18MM	78
83723460 Murrplastik	CONDUIT END GROMMET FOR M32 COND	75
87121228 Murrplastik	SMALL GROMMET KDT/ZE 12-13MM	165

Bushings, Grommets

1. Overview

Management bushings and grommets are passive cable management components designed to protect wires, cables, and conduits where they pass through panels, walls, or enclosures. These components prevent mechanical damage, reduce vibration stress, and maintain environmental seals. Their importance in modern electrical, automotive, aerospace, and industrial systems lies in enhancing system reliability, safety, and longevity while simplifying maintenance and compliance with regulatory standards.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Rubber Bushings	Elastomeric material for vibration damping, waterproof sealing	Automotive wiring harnesses, marine equipment
Plastic Grommets	Lightweight, chemical-resistant, low-friction surface	Consumer electronics, HVAC systems
Metallic Bushings	High mechanical strength, EMI shielding capabilities	Aerospace avionics, industrial machinery
Multi-hole Bushings	Integrated cable separation, strain relief	Data centers, control panels
Sealed Grommets	IP65+ protection rating, dust/water ingress prevention	Outdoor telecom cabinets, renewable energy systems

3. Structure & Composition

Typical bushings/grommets feature: - Base Material: Rubber (EPDM, silicone), thermoplastics (PVC, nylon), or metal alloys (aluminum, steel) - Geometry: Cylindrical, rectangular, or custom profiles with edge flanges - Internal Features: Cable retention ribs, anti-rotation tabs, integrated seals - Surface Treatment: UV-resistant coatings, flame-retardant additives, conductive plating

4. Key Technical Specifications

Parameter	Description	Importance
Material Temperature Range	-40 C to +150 C (varies by material)	Determines environmental compatibility
Protection Rating (IP)	IP54 to IP68	Defines ingress protection level
Size Range	3mm to 150mm diameter	Affects cable compatibility
Compression Force	5-50N/mm	Influences sealing performance
Flammability Rating	UL94 V-0, VW-1	Safety compliance indicator
Installation Method	Push-in, screw-mount, adhesive	Impacts maintenance efficiency

5. Application Fields

Industrial: PLC control cabinets, robotic arms
Telecom: 5G base stations, fiber distribution hubs
Transportation: Electric vehicle battery packs, railcar wiring
Energy: Solar inverters, wind turbine nacelles
Commercial: Server racks, medical imaging equipment

6. Leading Manufacturers & Products

Manufacturer	Key Products	Technical Highlights
HellermannTyton	Sealed Cable Glands Series 680	IP68 rating, -40 C cold-crack resistance
Panduit	Multi-Cable Transit Bushings	UL94 V-0 flame rating, 20+ cable capacity
3M	Scotch Cable Grommets	Self-sealing silicone material, EMI shielding
TE Connectivity	DEUTSCH DuraGrommet	10,000 insertion durability, aerospace qualified

7. Selection Recommendations

Key selection criteria: - Environmental factors (temperature, UV exposure, chemical contact) - Cable diameter and quantity (allow 20% tolerance) - Required protection rating (IP65+ for outdoor use) - Mechanical stress requirements (vibration, compression) - Regulatory compliance (REACH, RoHS, NEC Article 300) - Installation accessibility (permanent vs. serviceable connections)

8. Industry Trends & Developments

Emerging trends include: - Integration with smart sensors for cable health monitoring - Adoption of bio-based polymers for sustainability - Miniaturization for high-density data center applications - Additive manufacturing for custom geometries - Enhanced EMI shielding solutions for 5G infrastructure - Self-healing materials for extreme environments

9. Case Studies

Automotive: Tesla Model Y uses multi-layer silicone bushings to protect battery harnesses against vibration and thermal cycling.
Renewables: Vestas wind turbines employ IP66-rated grommets to maintain nacelle sealing under harsh weather.
Data Center: Google's server racks utilize Panduit multi-cable bushings to achieve 40% faster deployment times.