Custom machined part
Plastic insulators
- Job
- Supports & separates
- Materials
- G10, phenolic, PEEK, ULTEM & more
- Starting point
- Drawing, spec or old part
- Quantity
- One part to production
Custom machined insulators that support or separate a live or heated part while breaking the electrical or heat path. Machined to your drawing in the grade your specification names, from one part to production runs.
- ±0.002"–±0.005" on critical dimensions
- Family owned in Aurora since 1986
- Expedited service for breakdowns
What your insulator does
It holds a part and breaks a path
An insulator isn’t just plastic that doesn’t conduct. It supports or separates a live or heated part as well. These are the common forms.
| Form | What it does | What we machine | |
|---|---|---|---|
| Barriers and plates | What it does Separate live parts inside an enclosure or panel. | What we machine Sheet profiles, slots, cut-outs and hole patterns. | |
| Terminal boards and blocks | What it does Carry terminals or connections on an insulating base. | What we machine Drilled and tapped patterns, pockets and steps. | |
| Bus-bar supports | What it does Hold conductors in position and apart. | What we machine Slots, steps and mounting faces. | |
| Sleeves and bushes | What it does Line a hole so a bolt or shaft doesn’t touch the metal around it. | What we machine Turned bores, outside diameters and shoulders. | |
| Thermal blocks and pads | What it does Separate a heated part from the frame it mounts to. | What we machine Faces, pockets and fastener holes. |
Insulating a joint, bore or shaft? We also machine insulating rings
Grade and specification
Machined to the exact grade
Insulating laminates such as G10 come in several grades, and their properties change with the grade, the thickness and the direction of the glass weave. We machine to the grade and specification on your drawing.
Example grade specification
- Material & grade
- G10
- The exact grade, not just the resin family.
- Thickness
- 0.250"
- Laminate properties change with thickness.
- Weave direction
- LW / CW
- Which way the layers run in the finished part.
- Source document
- Spec / sheet
- The standard or supplier sheet the grade comes from.
- We machine to the full grade on your drawing.
- Insulating or static-dissipative? Some assemblies need a part that bleeds static rather than holds it. We machine both, to the grade on your drawing.
Getting a quote
Start with what you have
Any one of these is enough to get a quote started. Pick yours to see what helps.
Send the drawing and we machine to it.
- The full grade name
- Quantity
- Inserts or hardware to fit
Upload drawings, CAD files or photos on the quote form.
Send the old insulator, and the grade if you know it.
- Any part number or record
- Photos of how it mounts
- Quantity
Upload drawings, CAD files or photos on the quote form.
Send the specification and a sketch. We’ll ask for the rest.
- The grade on your spec
- Overall size and thickness
- Holes and mounting
Upload drawings, CAD files or photos on the quote form.
Materials for insulators
Laminates and high-performance plastics
Laminates
- G10
- Glass-epoxy laminate: rigid, strong and electrically insulating.
- Phenolic
- Paper and canvas grades for electrical and mechanical parts.
- Micarta
- Laminate grades as named on your drawing.
Need FR-4, GPO-3 or another grade? Put it on your drawing; we’ll confirm it with the quote.
Machined in Aurora
How your insulators are made
±0.002"–
±0.005"
On critical dimensions, depending on the material.
- Laminates and high-performance plastics CNC milled and turned to your profile, holes, bores and shoulders.
- Ready to fit: threaded inserts, standard hardware and fasteners fitted before shipping.
- Specs and CAD files kept, so the next batch matches the last.
Evaluating a supplier? See the shop and how we check the work.
Where insulators are used
- Electronics & semiconductor Barriers, boards and supports in equipment
- Power & switchgear Bus-bar supports and barriers
- Motors & drives Terminal boards and sleeves
- Heated process equipment Thermal blocks and pads
Buyer questions
Insulator FAQs
Something else? Call (630) 904-2525.
Ratings come from the exact grade, thickness and test in your specification. We machine to the grade you name; we don’t rate the finished part.
We can match its shape. The grade comes from your records or specification, so send any drawing, part number or spec with the part.
We hold ±0.002" to ±0.005" on critical dimensions, depending on the material. We review your drawing and confirm the critical dimensions with your quote.
Timing depends on the insulator, material and quantity, and comes with your quote. For an emergency breakdown, ask about our expedited service.
Not an insulator?
What does yours do?
Mounting and electrical parts are easiest to name by their job. We machine almost any plastic part, so if yours isn’t here, describe it in a quote request.
- Breaks an electrical or heat path Insulators
- Ring at a joint or bore Insulating rings
- Sets a mounted height Standoffs
- Sets a gap Spacers
- Mounts a component Brackets
- You only have the old part Reverse engineering
Standard quote
Ready to send your insulator details?
Experienced help from your first quote to the finished part.