Custom & Machined PTFE Balls — Material Specifications, Engineering Data & OEM Supply
Built to international industrial standards, Custom & Machined PTFE Balls from HEMSUN delivers low friction and universal chemical inertness for precision valve balls. Fabricated in Dahegam, Gandhinagar, Gujarat, India from high-density PTFE fluoropolymer with full material certification.
Where Custom PTFE Ball is used
Sealing and flow-control element in ball valves and pump check seats, where sphericity and surface finish decide shutoff tightness and operating torque.
PTFE suits check and valve balls because it seats against metal without galling and needs no lubricant that could contaminate the line.
Common where an obsolete or single-source part must be reproduced from a drawing, a sample, or measurement of the worn original.
Supplied to drawing across the published range — Tailored Dimensions: Machined to any custom diameter from 5 mm up to 310 mm, matching specific valve cavity sizes. — with dimensional and material reports on request.
Key properties
Tailored Dimensions
Machined to any custom diameter from 5 mm up to 310 mm, matching specific valve cavity sizes.
Precision Tolerances
Capable of achieving tight sphericity and dimensional tolerances down to ±0.01 mm on request.
Geometrical Customization
Can include details like threaded holes, slots, flat spots, or grooves as per drawings.
Custom Compound Blends
Compounding with fillers like glass fiber, carbon, bronze, graphite, or MoS2 in-house.
In-House Tooling
Custom mold and die fabrication reduces production lead times and costs.
Drawing Support
We accept engineering drawings in PDF, DXF, DWG, STEP, STP, and IGES formats.
Prototype to Production
Flexible manufacturing lines support small prototyping runs as well as high-volume OEM orders.
100% Quality Auditing
Individual testing of custom geometry using profile projectors and micro-meters.
Specifications
| Property | Value |
|---|---|
| Component Type & Grade | Custom & Machined PTFE Balls (Specification Code HES-982) |
| 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 |
Available sizes
We manufacture custom PTFE balls based entirely on client drawings. Below are typical parameters we accommodate. Custom tolerances are verified using calibrated inspection equipment.
| Size | Metric | Inch | Tolerance |
|---|---|---|---|
| Custom | 6.00 mm | 0.236″ | ±0.01 mm (Tight) |
| Custom | 10.00 mm | 0.394″ | ±0.02 mm (Tight) |
| Custom | 15.00 mm | 0.590″ | ±0.02 mm |
| Custom | 30.00 mm | 1.181″ | ±0.03 mm |
| Custom | 45.00 mm | 1.771″ | ±0.04 mm |
| Custom | 80.00 mm | 3.149″ | ±0.05 mm |
| Custom | 120.00 mm | 4.724″ | ±0.08 mm |
| Custom | 250.00 mm | 9.842″ | ±0.15 mm |
How this part is made
Compound Specification
We select the virgin resin or compound formulation (glass, carbon, bronze, or MoS2) based on mechanical and thermal specifications.
In-House Die Tooling
Our toolroom designs and cuts custom steel dies. The compound is compacted at calculated MPa pressures (20-25 MPa).
Thermal Curing
Sintering profiles are customized based on the preform size and filler compound to prevent micro-cracking and voids.
CNC Turning & Grinding
Specialized CNC lathes turn the custom features (holes, flats, grooves) and centerless grinders achieve target sphericity.
Metrology Lab Auditing
Dimensions are verified using digital micrometers, dial test indicators, and profile projectors to guarantee print compliance.
Material selection notes
Engineered from high-purity PTFE fluoropolymer, this component resists virtually all industrial acids, alkalis, and aggressive organic solvents. The non-stick, self-lubricating surface minimizes drag and prevents material buildup in fluid handling systems. Compressive deformation under load is optimized through tailored filler grades based on service pressure.
How to specify your order
To configure Custom & Machined PTFE Balls for your application, submit component dimensions, operating PV factors, and delivery port requirements. Our engineering team prepares complete technical evaluations and formal quotations within 24 hours.
Quality checks and inspection
Testing procedures for Custom & Machined PTFE Balls include optical comparator profile inspection, hydrostatic pressure holding tests on seal components, and material hardness checks (Shore D) to verify full sintering cure.
Ordering and export documentation
Domestic Custom & Machined PTFE Balls 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. Recurring supply schedules supported with fixed drawing revision and lot numbering for plant stores Contact info@hemsun.com or sales@hemsun.com with your balls specification.
Export packing and lead time
Export logistics for Custom & Machined PTFE Balls cover global delivery via air freight or ocean container through Mundra and Nhava Sheva ports. Products are packed with protective foam wrapping and moisture-barrier film inside export-grade wooden crates, accompanied by certified commercial invoices and Certificates of Origin.
Storage and handling
Guidelines for Custom & Machined PTFE Balls: 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.
Material comparison
See how our custom PTFE fabrication capabilities compare against off-the-shelf standard catalog spheres.
| Characteristic | Custom PTFE | Standard Catalog PTFE |
|---|---|---|
| Tolerance Control | Extra-Tight (capable of reaching ±0.01 mm sphericity) | Standard (typically ±0.05 mm to ±0.15 mm) |
| Design Complexity | Unlimited (supports holes, threads, flats, grooves) | Solid Spheres (standard round balls only) |
| Material Compounds | Custom Blends (carbon, glass, bronze, graphite, MoS2) | Standard Pure Virgin PTFE |
| Sourcing Cycle | Requires Tooling & Setup (typically 10-15 business days) | Immediate Stock (ships in 24-48 hours) |
Compliance & Standards
HEMSUN is a DGFT IEC registered exporter (Government of India). Diameter and sphericity are verified on calibrated gauges and the achieved grade is recorded on the inspection report; sintered density is checked per ASTM D792. 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 file formats do you accept for custom engineering drawings?
We accept PDF, DXF, DWG, STEP, STP, IGES, and SolidWorks file formats. Physical samples can also be shipped directly to our factory in Gujarat for reverse-engineering.
Can you supply filled PTFE compounds for custom balls?
Yes. We compound and mold filled PTFE materials including glass fiber, carbon, bronze, graphite, and MoS2 blends in-house to match structural specifications.
What is the minimum order quantity (MOQ) for custom PTFE balls?
Custom MOQs depend on tooling requirements and diameter. For parts requiring simple modifications, we offer flexible prototyping runs. Please contact our sales team to discuss details.
How do you verify the sphericity of custom-sized balls?
We utilize digital micrometers and roundness measuring instruments in our metrology lab to inspect the spheres at multiple axes, ensuring compliance with specified drawings.
Are you able to machine internal threads inside a PTFE ball?
Yes. We machine internal and external threads, blind holes, cross-drill holes, and flat spots using our precision CNC milling and turning centers.
Do you charge a separate tooling or die fee?
For standard geometries or small custom diameters where we have active tooling, there is no tool fee. For highly specialized dimensions, a nominal die fee is charged to cover tool steel fabrication.
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