JEKIN POLYMER FAQ
Frequently Asked Questions
Practical answers for engineering plastic selection, stock shapes, CNC parts, documentation and quotation preparation.
A useful starting point
The material name is only one part of the requirement.
A reliable review connects the polymer family with temperature, load, wear, chemical media, geometry, stock form, quantity and the documents needed for the project.
Project boundary: answers on this page are selection guidance. The exact grade, dimensions, batch documents and final component suitability must be confirmed for the actual application.
01 / Material
Material selection
Screen the service conditions first, then compare suitable polymer families and exact grades against the required evidence.
How do I choose an engineering plastic?
Start with temperature, load, wear, friction, chemical media, electrical needs, dimensional control, geometry, quantity and documentation. There is no universal best material; the final candidate should be checked against the exact grade information and the real service conditions.
Can I choose a material from service temperature alone?
No. Include load at temperature, exposure duration, thermal cycling, chemical contact, moisture, friction and the required service life. A material that suits an unloaded temperature condition may not suit a loaded or wear-critical part.
What if the material grade is not fixed yet?
Share the required performance and application conditions instead of choosing by name alone. A drawing, sample, target geometry, stock-shape dimensions, quantity and document requirements can help narrow the candidate range before the exact grade is confirmed.
02 / Shapes
Rods, sheets & tubes
Stock-form selection affects machining allowance, wall thickness, material yield and the practical supply route.
Are engineering plastics available as rods, sheets and tubes?
JEKIN reviews semi-finished rods, sheets or plates, and tubes according to the polymer family, exact grade, color, dimensions, quantity and current supply route. Availability should be confirmed for the requested specification rather than assumed for every grade.
How do I choose between a rod, sheet and tube?
Use the finished geometry and machining route as the starting point. Round parts may begin with rod, flat or prismatic parts may begin with sheet, and hollow or large-diameter parts may benefit from tube. Final selection depends on dimensions, allowance, wall section, grade and availability.
Can I request a non-standard stock size?
Send the material or candidate grade, shape, required dimensions, tolerance, quantity, destination and requested timing. The appropriate route may be current stock, cutting, production or a drawing-based review, and it must be confirmed for the exact requirement.
03 / CNC
CNC machined parts
A drawing or sample can start the review, but geometry, material, inspection and quantity still need to be aligned.
Can JEKIN review a drawing or sample?
Yes. Share the available drawing or sample together with the material or candidate grade, quantity, critical dimensions, tolerances, surface requirements, service conditions and requested inspection or document scope.
Can I request finished machined parts as well as stock material?
State clearly whether you need a semi-finished rod, sheet or tube, a drawing-based machined component, or both routes for review. The information needed for dimensions, machining allowance, inspection and quotation will differ between the two scopes.
What information helps with a CNC parts quotation?
Include the drawing or reference geometry, material and grade, quantity, critical tolerances, datums, surface requirements, operating conditions, inspection method, packaging, destination and any required technical or batch documents.
04 / Documents
TDS, COA & evidence
Document requirements should be tied to the exact material, grade, color, batch and intended application.
Can I request a TDS or COA?
State the required TDS, COA, lot information, traceability, inspection report or material declaration when you request a quotation. Availability depends on the exact supplied grade, color, batch and supply arrangement.
Does a document for one grade apply to every grade?
No. Technical values and supporting documents should be matched to the exact grade and supply condition. Do not transfer a document from another grade, color, filler level, batch or processing route without confirmation.
How should I handle food, medical or semiconductor requirements?
Describe the intended contact, process, cleaning or sterilization exposure, purity or contamination limits and required declarations. Any statement or document must cover the exact material and supply condition; the buyer remains responsible for validating the finished part and equipment.
05 / Quote
Quotation & delivery
A useful quotation connects the technical requirement with the actual stock or machining route.
What affects the quotation?
Material family and grade, stock form, dimensions, machining allowance, finished geometry, tolerances, quantity, inspection, documents, packaging, destination and supply route can all affect the quotation. A material name alone is usually not enough.
Can I request a quotation without a complete drawing?
You can begin with a sample, preliminary sketch, reference dimensions, approved material, application description or stock-shape requirement. The more information available, the more accurately the supply scope and remaining questions can be defined before quotation.
How is delivery confirmed?
Current stock, production route and delivery arrangement should be confirmed for the exact grade, shape, dimensions, quantity and destination. A general page should not be treated as a fixed lead-time commitment for every project.
Ready to clarify the requirement?
Send the information you already have.
Share the material, shape, drawing, service conditions, quantity or document requirement. The remaining questions can be defined from there.