Flanged bushing
Nylon 6 · Natural
- Ø50 × 40 mm · Ø20 through bore
- CNC turning
1 pc
$64.00
USD / part
25 pcs
$12.80
USD / part
-80.00%100 pcs
$9.29
USD / part
-85.48%CNC turning and milling · From 1 part
Plastic
Machining
Nylon, Delrin, PTFE, UHMW, PEEK and more, for anyone who needs a part: students, makers, startups, machine shops, engineers and businesses of any size. Upload your file and order from 1 part.
PTFE valve seat
PTFE (Teflon) · Ø50 × Ø25 × 12 mm
1 pc
$58.00 USD
per part
25 pcs
$13.59 USD
per part
-76.57%100 pcs
$9.74 USD
per part
-83.21%Plastics we machine
The most widely used engineering plastics in industry
Nylon Machining
Nylon 6: tough and wear-resistant. Pulleys, gears, bushings, rollers, and wheels.
View datasheet
Delrin (Acetal) Machining
Stiff, low-friction, and dimensionally stable. Gears, bushings, guides, and precision parts.
View datasheetPTFE (Teflon) Machining
The lowest friction, resistant to almost any chemical and to high heat. Seals, seats, and insulators.
View datasheet
UHMW Machining
Stands up to abrasion and impact. Guides, wear plates, and conveyor parts.
View datasheet
PEEK Machining
Keeps its strength at high temperature. Parts for oil and gas, aerospace, and medical equipment.
View datasheet
Polycarbonate Machining
Clear and highly impact-resistant. Guards, covers, and inspection windows.
View datasheetEstimated prices
How the price changes with quantity
A reference for planning your project. These examples estimate material, setup and machining; larger quantities spread the setup cost across the batch.
Already have your part? Quote it online
Positioning block
Acetal (POM) · Black
- 65 × 45 × 20 mm
- CNC milling · Pocket and 4 holes
1 pc
$74.00
USD / part
25 pcs
$23.00
USD / part
-68.92%100 pcs
$18.59
USD / part
-74.88%Conveyor guide rail
UHMW-PE · Natural
- 100 × 30 × 16 mm
- CNC milling · Channel and 2 holes
1 pc
$70.00
USD / part
25 pcs
$15.72
USD / part
-77.54%100 pcs
$11.87
USD / part
-83.04%Stepped insulator
PEEK · Natural
- Ø36 × 30 mm · Ø10 through bore
- CNC turning
1 pc
$155.00
USD / part
25 pcs
$36.00
USD / part
-76.77%100 pcs
$29.76
USD / part
-80.80%
Reference amounts in USD per part (excluding shipping and tax). Final pricing depends on geometry, tolerances, finishes and material availability.
Not sure which plastic to use?
Upload your file and tell us what the part is for: temperature, friction, chemicals, or impact. We'll help you choose the material.
Upload my fileMaterials
Plastics we machine and what each one is for
The same ones you choose in the portal when you configure your part.
Nylon 6 (Nylamid)
Flanged bushing
Tough and wear-resistant; absorbs some moisture. Pulleys, gears, rollers, wheels.
Acetal (Delrin / POM)
Positioning block
Stiff, low friction, stable dimensions. Gears, bushings, guides, precision parts.
PTFE (Teflon)
Valve seat
The lowest friction, resists chemicals and heat. Seals, valve seats, insulators.
UHMW-PE
Conveyor guide rail
Abrasion and impact resistance. Guides, wear plates, conveyors.
PEEK
Stepped insulator
High temperature and chemical resistance. Oil and gas, aerospace, medical equipment.
Polycarbonate
Inspection window
Clear and highly impact-resistant. Guards, covers, windows.
ABS
Milled enclosure
Easy to machine, good finish. Prototypes, housings, test parts.
HDPE
Mounting plate
Light, resists moisture and chemicals. Boards, tanks, parts in contact with water.
PVC
Connection flange
Resists chemicals and insulates. Flanges, fluid-handling parts, insulators.
Why PREMSA
Your plastic parts, from prototype to production
We help you choose the right plastic, make parts from 1 piece, and verify every batch before it ships.
From 1 part
No minimum quantity: a replacement part or a production run, with quantity pricing in the quote.
The right plastic
We help you choose between nylon, Delrin, PTFE, UHMW, or PEEK based on your application's temperature, friction, and chemicals.
Inspection and reports
Dimensional report, FAI, and material certificates on request, so your quality team can release without re-measuring.
Shipping to 52 countries
From Monterrey to all of Mexico and 52 countries, with estimated duties before you pay.
To design your part
Machining and materials guides
CNC machining material cost
How much the material weighs in a part's price and how to choose it.
View datasheetWhat is CNC turning?
How round parts are turned and which design details lower the cost.
View datasheetWhat is CNC milling?
How prismatic parts are milled and which design details lower the cost.
View datasheetFAQ
About plastic machining
- Which plastics do you machine?
- Nylon 6, Delrin (acetal or POM), PTFE (Teflon), UHMW, PEEK, polycarbonate, HDPE, ABS, and PVC. You choose them in the portal when you configure your part.
- What's the difference between nylon and Delrin?
- Both are used for bushings, gears, and guides. Nylon 6 is tougher and handles impact better, but it absorbs moisture and can grow slightly. Delrin (acetal) is stiffer, has lower friction, and holds its dimensions better, so it's preferred for precision parts.
- When should I use PTFE (Teflon)?
- When the part needs the lowest friction or will be in contact with aggressive chemicals or heat: seals, valve seats, insulators, and sliding parts. It's soft, so it's not a good choice for parts that carry heavy loads.
- What tolerances can you hold in plastic?
- By default, ISO 2768-m general tolerances apply. Plastics expand with temperature and some absorb moisture, so a tight tolerance in plastic is confirmed based on the material and the size of the part.
- Can I order a single part?
- Yes. There's no minimum quantity: you quote from 1 part, and the quote shows how the price per part drops with more quantity.
- What do I need to get a quote?
- Your STEP file or PDF drawing, the plastic, and the quantity. If you don't have a CAD file, request a manual quote in the portal and attach photos or the scanned drawing with dimensions.
- Can you make a plastic replacement part from a sample?
- Yes. Send photos and measurements of the part you want to replace in a manual quote; if needed, we'll model it to make it.
- Do you also 3D print plastic parts?
- Yes. For prototypes or shapes that can't be machined, switch the process to 3D Printing in the portal and choose the filament.
CNC machining of engineering plastics
An engineering plastic replaces metal when the part needs low friction, low weight, electrical insulation, or chemical resistance, and when it shouldn't need lubrication. That's why the bushings, gears, pulleys, rollers, and guides in so many machines are nylon, Delrin, or UHMW.
Each plastic does something different: nylon 6 is tough and wear-resistant; Delrin (acetal) is stiff and holds its dimensions very well; PTFE (Teflon) has the lowest friction and resists almost any chemical; UHMW stands up to abrasion and impact; and PEEK works at temperatures where the others can't.
Machining plastic isn't like machining metal: the material heats up and deforms if it's cut wrong, it expands with temperature, and some, like nylon, absorb moisture. That's why sharp tooling, the right feed, and how the part is held all matter, and why a tight tolerance in plastic is confirmed per material.
To order, upload your STEP or PDF drawing to the portal, choose the plastic and the quantity, and order from 1 part. If you're not sure which plastic fits, tell us what the part is for and we'll help you choose.
Engineering tools
To choose material and tolerances
Free datasheets and charts before you quote.
- Catalog
Materials catalog
Properties of every plastic and metal we work with.
View resource - Chart
ISO 2768 tolerance chart
The general tolerances that apply when the drawing doesn't specify another.
View chart - Chart
ISO 286 fits chart
Interference, transition, and clearance fits for bushings and holes.
View chart
Got a part in mind?
Upload it and we’ll make it real. One part or a thousand.