Bushings, Grommets

Part Number	Description / PDF	Quantity
87172022 Murrplastik	LARGE GROMMET KDT/Z-EMC, 21-22MM	0
87301170 Murrplastik	KDP/N 24/23 CABLE ENTRY PLATE FO	78
87303040 Murrplastik	KDP/Z 24/30 CABLE ENTRY PLATE FO	8
87303120 Murrplastik	KDP/ZR M40/6 ROUND CABLE ENTRY F	16
87301180 Murrplastik	KDP/N 24/29 CABLE ENTRY PLATE FO	38
83692832 Murrplastik	V-ZLT-95KB STRAIN RELIEF BLANK	0
87301034 Murrplastik	KDP/R M50/8 ROUND CABLE ENTRY FO	40
87171826 Murrplastik	SMALL GROMMET KDT/Z-EMC, 10-11MM	50
87303010 Murrplastik	KDP/Z 24/14 CABLE ENTRY PLATE FO	10
87172026 Murrplastik	LARGE GROMMET KDT/Z-EMC, 23-24MM	0
87172016 Murrplastik	LARGE GROMMET KDT/Z-EMC, 18-19MM	0
87171010 Murrplastik	CABLE ENTRY PLATE KDL, CUT-OUT S	28
87171024 Murrplastik	CABLE ENTRY PLATE EMC, CUT-OUT S	20
87171412 Murrplastik	LARGE GROMMET KDT/Z 16-17MM	0
87301038 Murrplastik	KDP/R M50/31 ROUND CABLE ENTRY F	5
87171026 Murrplastik	CABLE ENTRY PLATE EMC, CUT-OUT S	19
83692632 Murrplastik	ELH 12S THREADED INSERTS	0
87172028 Murrplastik	LARGE GROMMET KDT/Z-EMC, 24-25MM	0
87303160 Murrplastik	KDP/ZR M63/15 ROUND CABLE ENTRY	10
83692806 Murrplastik	ZS-70 STRAIN RELIEF ASSEMBLY	0

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.