Avoid measuring clamping distortion
Thin rings and soft sealing lips need a defined inspection approach. Identify free-state dimensions and any dimensions that apply only in the installed or restrained condition.
Engineering plastic / CNC MATERIALS
PTFE CNC Machining
Custom machined PTFE parts with virgin or filled material identified in the purchase specification.
CNC milling & turning · Drawing-based orders
Does the seal drawing call for virgin PTFE or a filled compound?
Keep filler identity and content in the specification. A glass-, carbon- or bronze-filled compound is not equivalent to virgin PTFE, and a PTFE brand name alone does not identify the formulation. OUJI has confirmed PTFE machining experience; the drawing must still define the particular stock and finished fit.
01 / MATERIAL SPECIFICATION
PTFE grades & conditions.
Match the full designation on your drawing. Frequent machining experience, published project evidence and specifications for review are shown separately.
| Grade / designation | Experience | Include with your drawing | Inquiry |
|---|---|---|---|
| Virgin PTFE | Specify for review | Virgin PTFE: specify the stock grade and any purity or contact-document requirements. | Quote grade ↗ |
| Glass-filled PTFE | Specify for review | Glass-filled PTFE: include the glass percentage and the mating-surface specification. | Quote grade ↗ |
| Carbon-filled PTFE | Specify for review | Carbon-filled PTFE: name the compound and state whether electrical behavior is an acceptance criterion. | Quote grade ↗ |
| Bronze-filled PTFE | Specify for review | Bronze-filled PTFE: give the bronze content and any media-compatibility requirement set by your design. | Quote grade ↗ |
OUJI machining experience: confirmed by the company owner, 10 September 2026. Family-level experience does not establish a specific grade, stock condition or customer end use; see individual row and case evidence.
Listed grades do not imply current inventory. Material condition, stock form and documentation are agreed with the quotation.
02 / MACHINING REQUIREMENTS
Make the drawing ready for review.
Focus on the details that change material purchasing, the machining route and finished-part acceptance.
Temperature at inspection
Give the inspection temperature and dimensional acceptance condition for close fits. Do not treat a warmed, freshly machined component as equivalent to a stabilized part.
Seal edges and surface marks
Mark functional lips and faces, allowed edge breaks and surface-finish requirements. A general deburring note should not authorize changes to a sealing edge.
ORDER DETAILS
Material, finish and documentation.
Specify the requirements together so the quoted scope matches the finished part you need.
Purchasing
Material certificates ↗
Specify the material records and traceability your order needs.
ManufacturingFinish compatibility ↗
Connect material, coating and final dimensional requirements.
SpecificationGrade cross-reference ↗
Review regional names without assuming an automatic substitute.
Finishing is coordinated through specialist partners. View surface finishing services.
Can filled PTFE replace virgin PTFE for a seal?
The buyer must approve the compound for the intended interface and environment. Filler selection changes the material specification, so a substitution cannot be based on machining convenience alone.
Can OUJI infer the media or pressure from a seal drawing?
Do not rely on that assumption. Include relevant acceptance requirements or an approved compound specification; the finished-part geometry does not establish its service conditions.
DRAWING TO QUOTATION
Have a material on your drawing?
Send the drawing and quantity. We’ll review the material, machining route, finish and inspection requirements together.
Response within 24 hours of receiving complete project details.
Start with what you have.
Open the full request form ↗Details already in your drawing do not need to be repeated. If a material is undecided, tell us what the part needs to do.
See our inspection approach ↗