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Manufacturing services
CNC milling and turning · From 1 part
Test nests, insulators, connectors, bushings, brackets and parts for electrical, medical and high-temperature equipment in ULTEM, milled and turned from your file. Upload your CAD and order online, starting at a single part.
Test nest
ULTEM (PEI) · 70 × 70 × 12 mm · 30 × 30 × 3 nest · 16 × 16 through window · 4 counterbored holes · 2 dowel holes · CNC milled
1 pc
$86.13 USD
per part
25 pcs
$24.27 USD
per part
-71.82%100 pcs
$21.71 USD
per part
-74.79%ULTEM (PEI, polyetherimide) is a rigid, strong high-performance plastic that works continuously up to about 170 °C, insulates electricity and meets UL94 V-0 for flame. It weighs 1.27 g/cm³, is very dimensionally stable and withstands steam sterilization. That is why it is used for test nests, insulators, connectors, bushings and parts for electrical, medical and high-temperature equipment. At PREMSA we CNC mill and turn it from your file, starting at a single part with an instant price.
ULTEM (PEI) properties: mechanical, physical, thermal, electrical and chemical data to choose the material for your machined part.
Material Type
Amorphous high-performance thermoplastic (PEI)
Primary Characteristics
High temperature resistance, excellent dimensional stability, flame-resistant, strong electrical insulation
Tensile Strength (Ultimate)
14,000–16,000 psi (96–110 MPa)
Flexural Strength
20,000–24,000 psi (138–165 MPa)
Elongation at Break
5–10%
Impact Resistance
Moderate
Hardness
Rockwell M100–M110
Density
1.27 g/cm³
Elastic Modulus
500,000–600,000 psi (3.5–4.1 GPa)
Continuous Service Temperature
~170–180 °C (338–356 °F)
Glass Transition Temperature
~217 °C (423 °F)
Thermal Conductivity
~0.22 W/m·K
Machinability
Good: it is rigid, so it is clamped firmly and cut with sharp tooling; tight-tolerance parts can be annealed
Flame Resistance
Excellent (UL94 V-0 rating)
Electrical Insulation
Excellent
Chemical Resistance
Good (resists many chemicals, oils and fuels; some chlorinated solvents attack it)
Moisture Absorption
Low to moderate
Common Forms
Plate and rod
Typical Applications
Test nests, insulators, connectors, bushings, parts for electrical, medical and high-temperature equipment
Rating across key engineering and manufacturing criteria.
Strength
Weight
Machinability
Thermal Resistance
Electrical Insulation
Dimensional Stability
Chemical Resistance
Cost Efficiency
Upload your CAD file and get an instant price and delivery date. CNC milling and turning from one part to production.
We CNC mill and turn ULTEM parts that have to handle heat, insulate electricity and hold their dimensions.
Test nests and fixtures
Insulators
Connectors and bases
Bushings and spacers
Electrical equipment parts
Sterilizable medical equipment parts
High-temperature parts
Brackets and guides
Custom ULTEM parts
What people ask most about ULTEM parts: what it is, uses, machining, temperature, strength, insulation, flame, sterilization, chemicals, threads, weight, price and tolerances.
ULTEM is chosen for parts that work with heat, electricity or sterilization: test nests, insulators, connectors, bushings and parts for electrical, medical and high-temperature equipment.
At PREMSA Industries we machine ULTEM with CNC milling and turning from your file, from a prototype to production.
ULTEM is chosen when the part has to be rigid, handle heat and insulate.
If your drawing doesn’t specify tolerances, we machine to ISO 2768-m (medium). On dimensions you call out —holes, pockets, contours and fits— we can hold ±0.05 mm (±0.002 in), and critical dimensions are checked in inspection. ULTEM is rigid and very stable, so it holds its dimensions well after machining.
ULTEM is machined with CNC milling, CNC turning, drilling and tapping. It is rigid: it is clamped firmly and cut with sharp tooling and good chip evacuation so it doesn’t heat up or crack. Tight-tolerance parts can be annealed to relieve stress.
Because it handles heat and insulates electricity, ULTEM is used in many parts made with CNC machining.
ULTEM is usually the right choice when the part runs hot, insulates electricity or gets sterilized.