G11 Plastic Machining

G11 epoxy resin is an ideal material for parts and components that require extremely high strength, high dimensional stability, and high creep resistance across a wide temperature range. Sometimes referred to as G11-FR5 or G11 laminate, this glass epoxy material is commonly used for terminal boards, electric rotor insulation, electronic test equipment, and high humidity applications. Although the material can be difficult to machine with accuracy, Upland Fab has the experience and expertise to fabricate high precision laminate parts from G11 plastic.

G11 Epoxy Resin

Like other phenolic laminates, G11 epoxy resin is produced by applying high heat and pressure to multiple stacked layers of specialty materials, which have been impregnated with synthetic thermoset resins. The heat and pressure polymerizes those disparate layers into a single, laminated material.

G11-FR5 is extremely strong and stiff, with excellent electrical properties and a very low coefficient of thermal expansion. It exhibits very low moisture absorption and is flame retardant. These and other factors make G11 plastic ideal for electronic and electromechanical components and high-humidity environments.

Precision Machined G11-FR5 Parts

Because of its unique makeup, accurately machining G11-FR5 presents a challenge. Upland Fab utilizes multi-axis CNC machining and special tools to produce high precision, tight tolerance G11 plastic parts. CNC technology ensures perfect repeatability from the first piece to the last, and enables us to fabricate parts with minimal time devoted to handling and fixturing. In many cases, even parts with very intricate geometries can be completed in a single operation for fast and efficient service.

Through DPD/MBD processes (Digital Product Definition/Model-Based Definition), we can work directly from your CAD models or other digital design files. This improves accuracy and helps us eliminate manufacturing errors, resulting in higher quality parts at lower costs.

Stay Up to Date with Upland Fab’s Top-Flight Communication

We know that communication is critical to success. With that in mind, we provide consistent, reliable updates to you informed on the progress of your project. And, when you work with Upland Fab, you’ll have a single point of contact throughout the entire process, making it easier to get the information you need.

Other Materials We Work With

Are you looking for another material? We have the ability to machine many different materials take a look below at some of the other plastics we work with.

Are you interested in taking a deeper look into which material you should be using? Contact us and we'll be happy to personally connect with you and discuss your application in more detail!

Contact Us Today to Discover the Upland Edge

Upland Fab is the leader in G11 plastic machining. Request a quote to get started, or contact us to discuss your specific project needs with an engineer.

Properties of G11 Epoxy Resin

ASTM or UL test	Property	G-3	G-5/G-9	G-7	G-10	G-11
	*PHYSICAL*
D792	Density (lb/in³) (g/cm³)	0.065 1.80	0.067 1.85	0.065 1.80	0.065 1.80	0.065 1.80
D570	Water Absorption, 24 hrs (%)	2.65	0.60	0.10	0.10	0.20
	*MECHANICAL*
D638	Tensile Strength (psi) -lengthwise	42,000 34,000	61,600 51,100	20,000 -	45,000 38,000	43,000 37,000
D790	Flexural Strength (psi) -lengthwise -crosswise	40,500 34,000	61,600 51,100	30,000 -	75,000 65,000	80,000 70,000
D790	Flexural Modulus (Kpsi) -lengthwise -crosswise	1,800 1,400	2,000 1,700	1,600 -	2,700 2,400	3,000 2,700
D256	IZOD Notched Impact (ft-lb/in) -lengthwise -crosswise	12.0 11.0	12.5 8.5	13.0 -	14.0 12.0	12.0 9.0
D695	Compressive Strength (psi)	55,000	65,000	50,000	65,000	63,000
D785	Hardness, Rockwell M	M110	M115	M105	M110	M112
	*THERMAL*
D696	Coefficient of Linear Thermal Expansion (x 10^-5 in./in./°F) -lengthwise -crosswise	0.83 1.00	0.83 1.00	0.72 0.90	0.55 0.66	0.72 0.83
-	Max Operating Temp (°F / °C)	340 / 170	285 / 140	430 / 220	284 / 140	329 / 165
C177	Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10^-4 cal/cm-sec-°C)	2.0 7.0	2.0 7.0	2.0 7.0	2.0 7.0	2.0 7.0
UL94	Flammability Rating	H-B	V-0	H-B	H-B	H-B
	*ELECTRICAL*
D149	Dielectric Strength (V/mil) short time, 1/8" thick	460	300	350	800	900
D150	Dielectric Constant at 1 MHz	7.3	6.3	4.5	5.0	4.5
D150	Dissipation Factor at 1 MHz	0.023	0.019	0.018	0.019	0.020
D495	Arc Resistance (sec)	180	180	240	100	120

[G11 material chart]

PROVIDING SOLUTIONS TO YOUR PLASTIC MACHINING REQUIREMENTS FOR OVER 50 YEARS