Family-owned precision machine shop · Aurora, Illinois · Since 1986

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Materials · High-performance plastics

PSU machining

Custom polysulfone (PSU) parts CNC machined to your drawing or sample: manifolds, housings, covers and insulators for equipment that sees hot water and steam. Machined in our Aurora, Illinois shop.

Quote a PSU part (630) 904-2525

PSU at a glance

Full name
Polysulfone (PSU)
Also called
Udel®
Known for
Toughness and clarity, and standing up to hot water and steam
Common in
Medical, food processing, laboratory and water equipment
Color
See-through amber when natural; also black

Parts in PSU

PSU parts we machine

The parts we see most often in PSU, and why it suits each job. We machine any PSU part to your drawing or sample, listed here or not.

Need a different PSU part? Send the drawing, or the old part, and we’ll quote it. Request a quote

Is PSU right for the part?

Where PSU works, and where another plastic may suit

General guidance on how PSU behaves. If your drawing specifies a PSU grade or Udel®, we machine to it.

Where it works

Steam
Takes hot water, steam and repeated sterilization.
Clarity
See-through amber, so you can see what’s inside the part.
Toughness
Tough and rigid, and takes everyday knocks.
Insulation
A good electrical insulator that stays stable as temperatures change.

Where another plastic may suit

If the part needs Often used instead
Solvents Some solvents can crack PSU. These resist them.
Sliding wear PSU isn’t a bearing plastic. These run against shafts and slides.
More steam cycles For parts sterilized over and over, PPSU lasts longer.

Precision in PSU

How we machine PSU

±0.002"–±0.005" On critical dimensions, depending on the plastic

PSU is stable and takes on little water, so it machines to close size. Coolant choice and heat at the cut are what we control. We confirm the critical dimensions with your quote.

  1. Coolants

    Some cutting fluids can crack PSU.

    We use coolants that are safe for it, or cut dry with air.

  2. Heat at the cut

    Heat from cutting can leave stress in the part.

    We keep tools sharp and feeds steady so the cut stays cool.

  3. See-through faces

    Tool marks show on clear parts.

    We use sharp tools and fine finishing passes for clean faces.

Grades

PSU grades

PSU comes unfilled and glass-filled. Name the grade on your drawing, or tell us how the part is used and we’ll suggest one.

Grade Typically used for
Unfilled Manifolds, covers and see-through parts.
Glass-filled Stiffer parts that hold close size, such as housings and brackets.
PPSU For tougher parts that are sterilized often. PPSU
Polycarbonate When the part doesn’t see steam, at lower cost. Polycarbonate

Buyer questions

PSU FAQs

Something else? Call (630) 904-2525.

All plastics we machine

PPSU is tougher and handles more sterilization cycles. PSU costs less. If your drawing specifies one, we machine to it.

Udel® is a brand of PSU. If your drawing specifies it, we machine to it. CDS isn’t affiliated with the trademark owner.

Yes. We supply PSU sheet and rod, cut to size when you need it, through our material supply service.

Getting a quote

Start with what you have

A drawing, a sketch or the worn or broken PSU part itself. Our experienced team takes it from there.

Request a quote (630) 904-2525
When a breakdown can’t wait, ask about our expedited service