PTFE Bush — Material Specifications, Engineering Data & OEM Supply
Built to international industrial standards, PTFE Bush from HEMSUN delivers low friction and universal chemical inertness for cylindrical bushes. Fabricated in Dahegam, Gandhinagar, Gujarat, India from high-density PTFE fluoropolymer with full material certification.
Where PTFE Bush is used
Plain bearing carrying radial load without grease, relying on the polymer’s low friction where oil lubrication is unwanted or impossible.
PTFE suits dry plain bearings because it runs against steel without seizing, removing the grease point altogether.
Supplied to drawing across the published range — Inner Diameter: 5mm to 300mm; Material: Virgin PTFE / Filled PTFE / Food Grade PTFE — with dimensional and material reports on request.
Key properties
Types
Sleeve, Flanged, Composite, Lined, Filled, Food Grade and Custom
Inner Diameter
5mm to 300mm
Outer Diameter
10mm to 500mm
Length
10mm to 500mm
Material
Virgin PTFE / Filled PTFE / Food Grade PTFE
Temperature range
-200°C to +260°C
Self-lubricating
zero external lubrication required
Maintenance-Free
zero external lubrication needed even in harsh chemical environments
Chemical Resistance
all acids, alkalis, and solvents, pH 0 to 14
FDA Compliance
Food Grade PTFE Bush available on request
Precision
CNC machined to tight tolerances
IEC registered
export-ready quality
Specifications
| Property | Value |
|---|---|
| Component Type & Grade | PTFE Bush (Specification Code HES-496) |
| Base Raw Material | PTFE fluoropolymer (Virgin FDA 21 CFR 177.1550 / Custom Filled) |
| Continuous Service Temp. | -200°C to +260°C (-328°F to +500°F) |
| Tensile Strength at Break | 20 to 35 MPa (Virgin) / 14 to 25 MPa (Filled) |
| Elongation at Break | 250% to 450% (ASTM D4894) |
| Specific Gravity / Density | 2.14 to 2.18 g/cm³ (ASTM D792) |
| Dielectric Strength | 50 to 80 kV/mm (0.1 mm film) |
| Surface Roughness Finish | Diamond Polished Ra ≤ 0.20 µm to Ra ≤ 0.40 µm |
| Dimensional Tolerance | ISO Grade 1 to Grade 3 / Drawing Nominals (±0.02 mm) |
| Manufacturing & Origin | Moulded, Sintered & CNC Machined in Dahegam, Gandhinagar, Gujarat, India |
Manufacturing process
Fabrication of PTFE Bush relies on high-tonnage powder compaction and free sintering of PTFE fluoropolymer. Preforms are pressed under strict pressure dwell parameters, then heat-treated above 342°C in forced-convection ovens to bond resin granules into a void-free, chemically resilient matrix.
Material selection notes
Physical performance of PTFE Bush is governed by high-grade PTFE fluoropolymer polymer formulation. Outstanding chemical resistance, high elongation (up to 400%), and low surface energy make it ideal for aggressive chemical pumps, valve seating, and pharmaceutical sanitary process lines.
How to specify your order
Procurement checklist for PTFE Bush: Specify outer dimensions (OD/ID/Length), chemical exposure media, temperature limits, and target delivery schedule. We assist in selecting the optimal virgin or filled material grade and provide itemized pricing with lead times.
Quality checks and inspection
Our quality department inspects PTFE Bush using precision coordinate measuring machines, digital surface roughness testers, and resin specific gravity balances, ensuring 100% adherence to customer drawing nominals.
Ordering and export documentation
Domestic PTFE Bush orders ship with GST invoice and e-way bill where applicable. Export orders include commercial invoice, packing list, and certificate of origin from our IEC-registered works. Material certificates and dimensional reports attached for qualified pharmaceutical and OEM shipments Contact info@hemsun.com or sales@hemsun.com with your bushes specification.
Export packing and lead time
Global shipments of PTFE Bush are handled by our dedicated export logistics team. Orders are packed in heavy-duty seaworthy packaging with VCI anti-corrosion barrier wrapping and dispatched with complete IEC customs documentation.
Storage and handling
Guidelines for PTFE Bush: Handle with clean gloves during precision assembly. Ensure mating metallic seats and shafts exhibit surface finishes of Ra ≤ 0.4 µm for maximum component operating life.
Compliance & Standards
HEMSUN is a DGFT IEC registered exporter (Government of India). Bore, wall and concentricity are verified on CMM against drawing nominals, with sintered density checked per ASTM D792 to confirm full compaction. A mill test certificate ships with the order. Export paperwork — commercial invoice, packing list and certificate of origin — accompanies international despatch.
Frequently Asked Questions
What is the difference between a PTFE Bush and a PTFE Bearing?
They refer to the same component. A PTFE Bush is also called a PTFE Sleeve Bearing, PTFE Bearing Bush, or Teflon Bearing. All describe a cylindrical PTFE component used to support a shaft or moving part with low friction, self-lubrication, and chemical resistance.
Do PTFE Bushes require lubrication?
No. PTFE Bushes are completely self-lubricating due to the inherently low friction coefficient of PTFE (0.04–0.10). No grease, oil, or external lubrication is required — they are maintenance-free throughout their service life.
What is the maximum size PTFE Bush you manufacture?
We manufacture PTFE Bushes with inner diameter from 5mm to 300mm and outer diameter up to 500mm. Custom sizes beyond these ranges are available from customer drawings or samples.
Do you export PTFE Bushes to Germany and UAE?
Yes. We regularly export PTFE Bushes — Sleeve, Flanged, Composite, Lined, and Food Grade types — to UAE, Germany, USA, Japan, Singapore, Brazil, Turkey, and across the Middle East.
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