Norplex-Micarta RTB320

Chemical Family: Phenols & Phenolics

Grade RTB320 has low moisture absorption and excellent dimensional stability. Produced with a bleached linen and a phenolic resin system, it's typical uses include retainers for ball-bearings and applications that require fine machining characteristics. RTB320 also complies with MIL-I-24768/13, Type FBE, ASTM D709 Type II Grade LE and with IEC 61212-3-1 PF CC 21.

Properties

Physical Form: Tube

Product families

Automotive & Transportation — Automotive

Chassis & Brake

Industrial — Chemical & Industrial Manufacturing

Equipment & Parts

Other characteristics

Density: 1330.0 - 1330.0 kg/m³
Features: Bearing Grade, Dimensional Stability, Good Machinability, Low Moisture Absorption
Polymer Name: Phenolic Compound
Reinforcement Material: Cotton
Markets: Automotive & Transportation
Industrial
Technology: Composite Materials
Plastics
Fillers Included: Cotton
Natural Fiber
Product Families: Composite Materials — Parts & Shapes
Plastics — Parts, Shapes & Films
Quality Standards: IEC PF CC 21
MIL-I-24768/13 Type FBE
NEMA LE
Composites End Use: Gaskets
Wheels
Material Features: Bearing Grade
Dimensional Stability
Good Machinability
Low Moisture Absorption
Plastics and Elastomers End Uses: Bearings
O Rings
Thrust Washer

Technical data

Table 1 of 3

6 rows

Characteristic	Value	Unit	Method
Specific Gravity (0.75" ID x 1.00" OD)	1.33	—	ASTM D792
Rockwell Hardness (0.75" ID x 1.00" OD)	110	M Scale	ASTM D785
Moisture Absorption (0.75" ID x 1.00" OD, Condition D1-24/23)	1.15	%	ASTM D570
Tensile Strength (0.75" ID x 1.00" OD, Condition A)	10000	psi	ASTM D638
Compressive Strength (0.75" ID x 1.00" OD, Condition A)	30000	psi	ASTM D695
Compressive Modulus (0.75" ID x 1.00" OD, Condition A)	380	kpsi	ASTM D695

Table 2 of 3

2 rows

Characteristic	Value	Unit	Method
Temperature Index (0.75" ID x 1.00" OD, Electrical / Mechanical)	135/135	°C	—
Flammability Rating (0.75" ID x 1.00" OD, Condition A)	HB	Class	UL Bulletin 94

Table 3 of 3