Bushings, Grommets

Part Number	Description / PDF	Quantity
87141716 Murrplastik	KDT/X-FDA 05 GROMMET 05-06 MM	144
87121258 Murrplastik	LARGE GROMMET KDT/ZE 27-28MM	0
87121238 Murrplastik	LARGE GROMMET KDT/ZE 17-18MM	49
87141736 Murrplastik	KDT/X-FDA 15 GROMMET 15-16 MM	144
87121230 Murrplastik	SMALL GROMMET KDT/ZE 13-14MM	137
87141710 Murrplastik	KDT/X-FDA 02 GROMMET 02-03 MM	144
87171232 Murrplastik	SMALL GROMMET KDT/Z 13-14MM R	99
87141728 Murrplastik	KDT/X-FDA 11 GROMMET 11-12 MM	144
87141720 Murrplastik	KDT/X-FDA 07 GROMMET 07-08MM	144
87141764 Murrplastik	KDT/X-FDA 29 GROMMET 29-30 MM	120
87121246 Murrplastik	LARGE GROMMET KDT/ZE 21-22MM	35
87121214 Murrplastik	SMALL GROMMET KDT/ZE 5-6MM RA	633
87121286 Murrplastik	SMALL GROMMET KDT/ZE 2X5MM OP	52
87141714 Murrplastik	KDT/X-FDA 04 GROMMET 04-05 MM	144
87141238 Murrplastik	MEDIUM GROMMET KDT/X 16-17MM	20
87141765 Murrplastik	BTG/XL-FDA BLANK GROMMET LARGE	120
87141752 Murrplastik	KDT/X-FDA 23 GROMMET 23-24MM	120
87121236 Murrplastik	LARGE GROMMET KDT/ZE 16-17MM	49
87121242 Murrplastik	LARGE GROMMET KDT/ZE 19-20MM	40
87141210 Murrplastik	SMALL GROMMET KDT/X 2-3MM RAN	119

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.