Product Overview
HDPE bushings are cylindrical plastic components installed between a shaft, pin or moving part and its housing. They provide a non-metallic contact surface for guiding, spacing, isolating and reducing direct contact between mating components.
Technical Specifications
|
Parameter / Feature |
Technical Standard / Available Option |
|
Base Material |
100% Virgin HDPE (FDA / RoHS compliant grades available) |
|
Material Density |
0.94 - 0.97 g/cm³ |
|
Operating Temperature |
-50°C to +80°C (-58°F to +176°F) |
|
Melting Point |
130°C to 137°C (266°F to 278°F) |
|
Surface Finish |
Machined finish (Ra 1.6 - 3.2 µm standard) |
|
Color Options |
Natural (White), Black, or custom industrial colors |
Key Material Advantages
High Moisture & Corrosion Resistance
Prevents dimensional expansion in humid or wet processing environments.
Low Coefficient of Friction
Provides smooth sliding contact to help minimize wear on mating metal shafts.
Impact & Shock Absorption
Flexes under load to absorb mechanical vibration and repeated stress cycles.
Lightweight Efficiency
Approximately 1/7th the weight of bronze or steel bushings, reducing equipment inertia.
Industrial Applications
Conveyor Systems: Shaft sleeves, guide rollers, and pivot points in material handling setups.
Water & Wastewater Treatment: Submerged bushings, agitator shaft guides, and fluid-exposed wearing elements.
Agricultural Machinery: Linkage pins, pivot joints, and dirt-resistant slide blocks.
Food & Packaging Equipment: FDA-compliant non-contaminating guides and wear components.
General Mechanical Equipment: Hinge pins, sliding supports, isolated mounting collars, and custom spacers.
Operating Conditions
HDPE bushings are suitable for selected industrial applications involving sliding, pivoting and low-speed rotational movement.
Temperature: Typical HDPE service temperature is approximately -50°C to +80°C, depending on the material grade and application.
Moisture: Very low water absorption makes HDPE suitable for many humid and wet environments.
Chemical Exposure: HDPE has good resistance to many acids, alkalis, salts and industrial chemicals. Suitability depends on the specific chemical, concentration and temperature.
Load and Movement: Bushing performance depends on load, contact area, shaft speed, movement type, temperature and lubrication conditions where applicable.
Engineering Selection Criteria
Optimal performance relies on reviewing mechanical and environmental variables together rather than selecting dimensions in isolation:
Shaft and Housing Fits
Bore (ID) and outside diameter (OD) dimensions are matched precisely to the mating pin/shaft and housing bore, accounting for thermal expansion.
Load and Speed Limits
Designed for light-to-medium radial loads and low-speed rotational, pivoting, or sliding movements.
Environmental Resistance
Highly resilient against water, chemical washdowns, and inorganic salts without swelling or requiring external lubricants in basic setups.
Quality Control
Drawing-Based Manufacturing: Produced against 2D drawings (PDF, DWG, DXF), 3D STEP/IGES CAD models, or physical sample measurement.
Quality Assurance: In-process checking covers inner/outer diameters, concentricity, flange thickness, and surface finish to match approved drawing requirements.
Batch Consistency: Production records, setup parameters, and material specs are archived for seamless repeat ordering.
Export Packaging: Shipped with protective film, individual polybags, shock-absorbent cartons, and heat-treated pallets for international transit.
FAQ
Q: Can HDPE bushings be manufactured from our drawing?
A: Yes. Production can be based on 2D drawings, 3D CAD files, dimensioned sketches or physical samples.
Q: Can you produce flanged and stepped bushings?
A: Yes. Flanges, steps, grooves, holes and other machined features can be incorporated into custom designs.
Q: Can the ID and OD be produced to specified tolerances?
A: Yes. Dimensional requirements can be controlled according to the approved drawing and mating assembly.
Q: Can an existing metal bushing be replaced with HDPE?
A: This can be evaluated based on shaft and housing dimensions, load, movement, temperature and working environment.
Q: Can samples be supplied before production?
A: Sample production can be arranged for dimensional and assembly verification before larger production quantities.
Q: What information is needed for a quotation?
A: For a faster quotation, provide:
2D drawing or 3D CAD file
Inner diameter
Outer diameter
Overall length
Material requirement
Dimensional tolerances
Required quantity
Application and operating conditions
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