Premium Quality Plastic Bushing
| Manufacturer | DALON |
| Material | WOUND FIBER GLASS POLYMER |
| Type | SLEEVE BUSHING |
| Working Temperature ?/td> | From - 196°C to + 19680°C |
| Product Code | WFB-505540-B31 |
| Density (g/cm³) | 1.9 |
| HS Code | 8483300090 |
| Hardness | HRM 95 |
| Static Load (Mpa) | 190 Mpa |
| Max Speed (m/s) | 2 |
| Max PV (dry) | 2.2 |
| I.D.(d) | 50 |
| I.D. (d1) | |
| O.D. (D) | 55 |
| O.D. (D1) | |
| Length (L) | 40 |
| Flange Dia. (fd) | |
| Flange Thickness (fl) | |
| General Tolerance | E10 r7 js13 |
| Weight(ref)/Gram | 0.00 |
| Minimum Order Qty | 500 |
| Designation | Test Method | Unit | DALON(DOB-EP) |
|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.46 |
| Dynamic friction/steel(dry) | 0.05~0.20 | ||
| Max.PV(dry) | N/mm²*m/s | 0.4 | |
| Mechanical capability | |||
| Tensile strength 20?/td> | ISO527 | N/mm² | >40 |
| Compressive strength 20?/td> | ISO527 | N/mm² | >75 |
| E-module | ISO527 | N/mm² | >1300 |
| Max.static pressure of the surface 20?/td> | N/mm² | >70 | |
| Charpy notched impact strength 30?/td> | ISO179-2 | Kj/m² | 3 |
| Hardness Rockwell | ISO2039-2 | HRR | 108 |
| Physical and thermal capability | |||
| Continuous work temperature | ?/td> | -40/80 | |
| Short-time work temperature | ?/td> | -70/+120 | |
| Thermal conductivity | ASTME1461 | W/m.k | 0.2 |
| Linear coef.Of thermal expansion | ASTMD696 | K-1.10-5 | 10 |
| Moisture absorption RH50/23?/td> | ASTMD570 | % | 0.2 |
| Electrically conductivity capability | |||
| Volume resistivity | IEC60093 | Ω.cm | >1012 |
| Surface resistivity | IEC60093 | Ω | >1015 |
| Flammability | UL94 | HB | |
| Color | Dark Grey | ||
| Designation | Unit | B-32 | B-31 | B-21 | B-06 | B-03 | B-01 |
|---|---|---|---|---|---|---|---|
| Basic type | Higher Load | Higher Load | High Load | Standard | General | Economic | |
| Static load | Mpa | 485 | 465 | 240 | 240 | 240 | 150 |
| Dynamic load | Mpa | 210 | 190 | 160 | 150 | 100 | 30 |
| Density | g/cm³ | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 |
| Max.speed | M/s | 0.5 | 0.5 | 0.2 | 0.2 | 0.2 | 0.1 |
| Max.PV | Mpa*m/s | 2.5 | 2.2 | 2 | 2 | 1.8 | 1.6 |
| Coefficient of friction | - | 0.03-0.12 | 0.03-0.12 | 0.03-0.12 | 0.03-0.12 | 0.03-0.12 | 0.15-0.25 |
| Working temp. | °C | ±196 | ±196 | ±180 | ±180 | ±150 | ±150 |
| Short-time work temp. | °C | -269~+269 | -269~+269 | -196~230 | -196~+230 | -196~+196 | -196~+160 |
| Radial compressive strength | Mpa | 550 | 520 | 500 | 500 | 500 | 200 |
| Hardness | HRM | 95 | 95 | 95 | 95 | 95 | 85 |
| 25-150°C Linear thermal expansion factor | Um/m°C | 13×10-6 | 13×10-6 | 13×10-6 | 13×10-6 | 13×10-6 | 13×10-6 |
| Color | - | Black | Black | Black | Black | Black | Black |
DALON’s WOUND FIBER GLASS BUSHING 50×55×40 is a high-performance insulating component specifically designed for electrical plastic bushing applications. Crafted from thermoset resin-impregnated fiberglass yarn and precision wound into a cylindrical sleeve, this bushing delivers excellent dielectric strength, dimensional stability, and thermal resistance in high-voltage or thermal-cycling environments.
With an inner diameter of 50 mm, outer diameter of 55 mm, and a length of 40 mm, it is tailored for tight-fitting applications where both electrical insulation and structural support are critical. The continuous glass fiber construction resists cracking, creep, and fatigue under mechanical or thermal stress, making it ideal for housing, spacing, or guiding conductive elements.
Unlike injection-molded plastic bushings, the wound fiberglass construction allows controlled fiber alignment, resulting in enhanced mechanical strength and resistance to delamination. Its non-conductive and flame-retardant properties also ensure reliable performance in power distribution systems, transformers, switchgear, and electrical motor housings.
Material: Wound fiberglass with thermosetting resin
Dimensions: ID 50 mm × OD 55 mm × Length 40 mm
Electrical Insulation: Excellent dielectric performance
Thermal Range: Operates from -40°C to +180°C continuously
Flame Resistance: UL-compliant non-conductive resin system
Mechanical Strength: Resistant to cracking, vibration, and deformation
Customizable: Available in various wall thicknesses and lengths
Electrical insulation in power electronics and switchgear
Motor and transformer shaft sleeves
High-voltage equipment bushings and guides
Industrial control panel spacer sleeves
Structural insulation in battery modules and EV systems
DALON is a trusted manufacturer of precision-engineered plastic bushings and wound fiberglass components, serving global OEMs in electrical, energy, and industrial sectors. With ISO 9001:2015 certification and decades of experience in composite material processing, we offer both standard and customized solutions to meet your design and functional requirements.
We offer:
Full customization of inner diameter, wall thickness, and length
Rapid development for prototype and production parts
35–40 day lead time for new tooling; 30 days for existing molds
Technical support for insulation, mechanical loading, and installation
Low-MOQ options and engineering consultation
Q1: What is a wound fiberglass bushing used for in electrical systems?
It insulates and supports conductive parts in high-voltage or thermally sensitive assemblies, preventing short circuits and maintaining structural alignment.
Q2: How does this bushing compare to molded plastic bushings?
Wound fiberglass bushings offer better mechanical strength, temperature resistance, and dimensional precision compared to injection-molded plastics.
Q3: Is this material suitable for outdoor or harsh environments?
Yes. The fiberglass and resin system provides excellent UV, moisture, and chemical resistance.
Q4: Can the size be customized for different shaft or housing fits?
Absolutely. We can customize ID, OD, and length according to your engineering drawings or application needs.
Q5: What is the lead time for custom bushings?
For existing tooling, the lead time is around 30 days. For new tooling and custom designs, expect 35–40 days including mold development.
Q6: What industries use fiberglass plastic bushings?
Used widely in energy systems, electric vehicles, power electronics, automation control, and industrial switching devices.
Q: What material is best for electrical insulation bushings?
Fiberglass with thermoset resin is ideal due to its high dielectric strength, mechanical integrity, and resistance to heat and flame.
Q: Can fiberglass bushings handle high voltages?
Yes. Wound fiberglass bushings are designed to withstand high dielectric stress in switchgear, transformers, and high-voltage systems.
Q: Are fiberglass bushings resistant to vibration and thermal shock?
They are highly stable under mechanical and thermal cycling, making them reliable in dynamic and high-stress environments.
The versatility of WOUND FIBER GLASS BUSHING 50X55X40 makes them ideal for numerous applications, including:
WOUND FIBER GLASS BUSHING 50X55X40 are designed for environments where traditional lubrication is impractical or impossible. They offer outstanding performance, durability, and cost savings, making them the preferred choice for various industries. Experience the reliability and efficiency of WOUND FIBER GLASS BUSHING 50X55X40, tailored to meet the demands of your specific applications.
Our professional team is ready to assist with your inquiry for this Wound Fiberglass Bushing – Electrical Plastic Insulation 50×55×40.
Contact UsAll our products are manufactured according to ISO 9001 standards.
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