Capability
PTFE Machining Services from India
Precision Machining India supplies OEMs and procurement teams worldwide with PTFE Machining, made in our ISO 9001:2015 certified CNC machining plant in Pune, India.
ISO 9001:2015 Certified
Documented quality management system
Mitutoyo Quality Inspection
Calipers, micrometers, height gauge, DTIs
Export-Ready Packaging
VCI film, ISPM-15 wooden crates
RFQ Response in 24 Hours
Quote within one working day
NDA Available
Your drawings stay confidential
On this page15 sections
Direct answer
What you get when you order PTFE Machining
Seals, seats, rings and liners in virgin and filled PTFE. The work is quoted from your drawing and 3D model, made to the revision you release, and delivered with a dimensional inspection report for the batch. Standard capability for this process is ±0.05 mm typical; ±0.025 mm on selected diameters. Polymer stock is cut with sharp, high-rake tooling and left to stabilise at room temperature before it is measured, because machining heat moves a plastic section much further than a steel one. There is no fixed minimum order: a single prototype and a 10,000-piece release follow the same documented route through programming, first-article inspection and export packing from our ISO 9001:2015 certified shop in Pune.
- Tolerance: ±0.05 mm typical; ±0.025 mm on selected diameters
- Materials: PTFE (Teflon)
- Typical parts: seals & rings, bushings, insulators and valve components
- Quoted within 24 hours, NDA on request, no minimum order quantity
At a glance
Materials & technical specifications
Material choice drives cost, lead time and performance. We stock or source certified bar and plate in PTFE (Teflon), with EN 10204 3.1 material certificates available on request.
- Process
- PTFE Machining
- Materials
- PTFE (Teflon)
- Standard tolerance
- ±0.05 mm typical; ±0.025 mm on selected diameters
- Surface finish
- As-machined, fine turned for sealing faces
- Max turning size
- Ø400 × 1200 mm (conventional), bar work on CNC lathes
- Max milling envelope
- 800 × 500 × 400 mm (VMC)
- Threading
- M3–M32 auto tapping; metric, BSP, NPT, UNC/UNF
- Batch size
- 1 prototype to 10,000+ pieces
PTFE Machining: overview
Seals, seats, rings and liners in virgin and filled PTFE. PTFE is turned and milled with sharp, high-rake tools at controlled speeds. Parts are stress-relieved where needed and measured after temperature stabilisation because PTFE expands with heat.
Every order is programmed in VISI or Delcam CAM, machined on CNC turning centres and VMC, and inspected in our Mitutoyo quality lab before it is packed and shipped.
PTFE Machining capability
We run ptfe machining on dedicated machines, so prototypes, pilot lots and production runs all follow the same documented process. Common parts include seals & rings, bushings, insulators and valve components.
Before quoting, our engineers review your STEP, IGES or PDF drawing for machinability and suggest changes that reduce cost without affecting function.
- CNC turning centres (LMW, Jyoti, Ace Micromatics): Shafts, bushings, fittings, turned plastic parts
- Vertical machining centre (VMC) (Ace Micromatics, FANUC control): 3-axis milling, bed 800 × 500 × 400 mm
- Auto tapping machines (M3 to M32 capacity): High-volume internal threading
- Conventional lathe (Uma Enterprises): Turning up to Ø400 × 1200 mm
- Band saw (Rajlaxmi): Bar stock cutting and blank preparation
Tolerances & surface finish
Standard capability for this work is ±0.05 mm typical; ±0.025 mm on selected diameters. Bores can be held to H7 and bearing seats to h6/g6 fits. Where your drawing calls for tighter limits, we agree the critical characteristics up front and record them on the inspection report.
Surface finish is typically Ra 1.6–3.2 µm as machined, with Ra 0.8 µm achievable on turned sealing and bearing surfaces. Plastics are finished with sharp tools to avoid smearing and burrs.
Plating, anodising, passivation and heat treatment are arranged through qualified partners and re-inspected in-house before packing.
Quality inspection process
Quality is built into every step under our ISO 9001:2015 management system. Raw material is checked against its mill certificate, the first article is fully inspected against the drawing, and in-process checks run at defined intervals.
Every shipment includes a dimensional inspection report, with material test certificates (EN 10204 3.1) on request.
- Mitutoyo digital vernier calipers
- Mitutoyo height gauge
- Granite surface plate
- Mitutoyo outside micrometers
- Inside calipers and bore gauges
- Dial test indicators
Envelope, tolerance and quantity
Check the part against these three cards before you send the drawing. They describe the machines and instruments we own, not a general industry capability.
Size and set-up
Will the part fit our machines
- Turned diameter
- Up to Ø400 mm on the conventional lathe; smaller bar and billet work on the CNC turning centres
- Turned length
- Up to 1200 mm between centres
- Milled envelope
- 800 × 500 × 400 mm on the 3-axis VMC
- Threading
- M3 to M32 auto tapped; metric, BSP, NPT and UNC/UNF single-point or thread-milled
- Blanks
- Rod, tube or plate cut to length on the band saw and deburred, with the stock lot identified against the works order
Tolerance, fits and finish
What is held, and how it is checked
- Standard for this work
- ±0.05 mm typical; ±0.025 mm on selected diameters
- Unmarked dimensions
- ISO 2768-m unless your drawing states another class
- Fits
- Agreed as a diametral clearance in millimetres rather than an ISO 286 class, because the polymer moves with temperature and load
- Surface finish
- Ra 1.6–3.2 µm as machined; sealing faces fine turned with a sharp, high-rake tool
- Verified with
- Mitutoyo micrometers, vernier calipers and height gauge, inside calipers, bore gauges and dial test indicators on a granite surface plate
- Measured when
- After the part has stabilised at room temperature, so the reading on the report is the one you will receive
Quantity, quote and paperwork
From RFQ to crated batch
- Batch size
- One prototype to 10,000+ pieces, with no fixed minimum order quantity
- RFQ turnaround
- A price and a lead time within 24 hours of a drawing, quantity, material and destination
- Lead time
- Quoted per batch with the price; any partner plating, anodising, passivation or heat treatment is listed as its own step
- First article
- Dimensional report on new parts for your sign-off before the balance is machined
- With every shipment
- Inspection report, commercial invoice, packing list and certificate of origin; the stock supplier's material certificate where the grade is supplied with one
- Incoterms
- EXW Pune, FOB Nhava Sheva (JNPT) or Mumbai, or CIF your port
How a PTFE Machining order runs
The same five stages for a one-off and for a scheduled release. Nothing is cut before the quote and the drawing revision are agreed in writing.
- 01
Drawing in, NDA first if you want one
Send the PDF with a STEP or IGES model, the grade, the batch quantity and the destination. We sign an NDA before the files move if your part is confidential.
- 02
DFM review and quotation
An engineer rebuilds the set-ups in VISI or Delcam, queries anything undimensioned or unmeasurable, and flags features that cost more than they return. Price and lead time come back within 24 hours.
- 03
Stock and blank preparation
Rod, tube or plate in PTFE (Teflon) is bought to grade and cut to length on the band saw, with each blank identified against the works order so the batch stays traceable.
- 04
Programme, first-off and sign-off
The verified toolpath is loaded on the equipment this process uses — CNC turning centres and VMC — and the first part off is measured against every drawing dimension. On a new part, that report goes to you for approval before the batch continues.
- 05
Production, final inspection and packing
In-process checks run at set intervals against the agreed critical characteristics. Any partner plating, anodising, passivation or heat treatment is re-inspected here on return. Parts then go into VCI anti-rust film and ISPM-15 heat-treated crates with the full document set.
Industries we serve
This work is used across pumps & valves, electronics & electrical, general engineering and aerospace. Pumps & Valves customers, for example, need corrosion-resistant shafts, seats and wear parts with accurate runout and finish.
Our core customers are corporate OEMs in automotive, hydraulics, pumps & valves and general engineering, plus multinational companies that need PTFE, Nylon, Delrin and PEEK parts machined to drawing.
Export packaging & logistics
We export to 45+ countries from Nhava Sheva (JNPT), with sea transit of about 4–7 days to the Gulf, 18–28 days to Europe and the UK, and 25–35 days to North America. Air freight is available for urgent orders.
All parts are protected with VCI film and packed in ISPM-15 crates. We quote EXW, FOB or CIF to suit your logistics.
Why choose an Indian machining partner
India has become a leading China+1 destination for precision machined components. For international buyers, we combine competitive piece prices with an ISO 9001:2015 quality system, English-speaking engineers and drawings worked to ISO, DIN and ASME standards.
You get a 24-hour RFQ response, an NDA on request, one engineer as your contact, and inspection reports with every shipment.
- ISO 9001:2015 certified
- Mitutoyo quality inspection
- Export-ready packaging
- RFQ response in 24 hours
- NDA available
Drawing notes that decide the price
Most of the gap between two quotes for the same part comes from the notes around the geometry rather than the geometry itself. These are the ones that move our price the furthest.
Put this on the drawing
- Say whether a dimension applies as-machined or after conditioning, and at what temperature it is to be verified.
- Mark the three or four features that actually matter and leave the rest at ISO 2768-m. We price the recorded measurements as much as the material.
- Give the fit you need as a diametral clearance in millimetres and say at what temperature it applies; an ISO 286 class alone does not describe a polymer bore.
- Name the datums, and say which face a runout, position or flatness call-out is measured from.
- State the grade in full — Virgin PTFE — rather than a family name or “as per sample”.
What quietly inflates the price
- Flatness, concentricity or runout with no datum. As drawn it cannot be measured, so it comes back as a query before anything can be priced.
- A hardness figure to be certified on the part. Heat treatment and hardness testing are done outside, so allow for the transit in the delivery date.
- Splitting an agreed batch into several small releases after the order is placed. Each release repeats the set-up and the first-off.
- A revision issued after the stock is cut. Stock is bought and sawn to the lengths on the drawing we quoted.
- Internal pocket corners below R1.5, or pockets deeper than about five times their width. Both force a long, slow cutter and extra finishing passes.
How to order
Getting a quote for PTFE Machining is simple:
- Send your drawing (PDF) and 3D model (STEP or IGES) with material, quantity and destination.
- Our engineers review it and send a quote with lead time within 24 hours.
- Approve samples or a first-article report for new parts.
- We machine, inspect, pack and ship with full export documents.
What is in scope, and what is not
Where PTFE Machining starts and stops here, stated plainly so you can check it against your approved-vendor requirements before sending a drawing.
Programmed before anything is cut
Your model is built into set-ups in VISI or Delcam and the toolpath is simulated, so the first part off the machine is a check rather than an experiment.
Measured in-house, with the limits stated
Mitutoyo micrometers, vernier calipers and height gauge, inside calipers, bore gauges and dial test indicators, used on a granite surface plate. There is no CMM, optical comparator or hardness tester here; a feature needing one is sent out and priced that way.
The approvals we hold, and those we do not
ISO 9001:2015, with inspection records kept per batch. We do not hold AS9100 or ISO 13485 and do not take flight-critical or implanted-device work. Industrial, hydraulic, pump, valve and general engineering parts are the normal scope.
Handled as polymers, not as soft metal
Each polymer gets its own tool geometry, speeds and light finishing passes, with stress relief or annealing arranged where a tight tolerance needs it, and measurement held back until the part is at room temperature.
Traceability you can audit
The stock lot recorded against the works order, the supplier's material certificate where the grade is supplied with one, a dimensional inspection report with every shipment, and an NDA signed before drawings change hands.
Packed and documented for export
VCI anti-rust film and ISPM-15 heat-treated crates, with commercial invoice, packing list, certificate of origin and inspection report. Parts leave Pune for 45+ countries EXW, FOB Nhava Sheva (JNPT) or Mumbai, or CIF.
Frequently asked questions
Get a quote in 24hWhat tolerances can you hold for PTFE Machining?
Standard capability is ±0.05 mm typical; ±0.025 mm on selected diameters. Bores to H7 and shaft fits to h6/g6 are routine; tighter limits are agreed per drawing.
Are you ISO certified?
Yes. We are ISO 9001:2015 certified. We do not hold AS9100 or ISO 13485, but we work under customer quality plans and supply full inspection reports and material certificates.
What files do you need for a quote?
A PDF drawing with tolerances plus a STEP or IGES model is ideal. Include material, quantity, finish and destination. We reply within 24 hours.
What is your minimum order quantity?
There is no fixed MOQ. We machine single prototypes, low-volume batches and high-volume production runs.
Do you export?
Yes. We export to 45+ countries across North America, Europe, the Middle East, Africa, Asia-Pacific and Latin America.
Keep exploring
Related capabilities, materials and markets
Everything below is machined in the same Pune plant to the same ISO 9001:2015 system. Follow whichever is closest to the part you are sourcing.
Capabilities & related parts
4Export markets
8Request for quotation
Send your drawing. Get a quote in 24 hours.
Upload STEP, IGES or PDF files. NDA available on request. Quoting: PTFE Machining.