company tower banner
Norplex-Micarta Company Logo

Norplex-Micarta RTB320Z

RTB320Z is similar to RTB320X being composed of an extra-fine weave woven cotton fabric combined with a phenolic resin system. RTB320Z tubes have higher densities (minimum allowable specific gravity is 1.30) resulting in enhanced precise machining characteristics and are expected to give longer life in wear applications. Typical uses include retainers for ball-bearings. RTB320Z also complies with MIL-I-24768/13, Type FBE, ASTM D709 Type II Grade LE and Federal Specification WW-L-2887 and IEC 61212-3-1 PF CC 21.

Polymer Name: Phenolic Compound

Reinforcement Material: Cotton

Physical Form: Tube

Density: 1340.0 - 1340.0 kg/m³

Features: Bearing Grade, Good Machinability, High Density, Wear Resistant

  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Fillers Included
Polymer Name
Reinforcement Material

Features & Benefits

Applications & Uses

Markets
Plastics & Elastomers End Uses

Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity (0.75" ID x 1.00" OD)1.34ASTM D792
Rockwell Hardness (0.75" ID x 1.00" OD)105M ScaleASTM D785
Moisture Absorption (0.75" ID x 1.00" OD, Condition D1-24/23)1.4%ASTM D570
Acetone Extraction (0.75" ID x 1.00" OD, Condition A)max. 1.0%ASTM F2953-12
Tensile Strength (0.75" ID x 1.00" OD, Condition A)11000psiASTM D638
Compressive Strength (0.75" ID x 1.00" OD, Condition A)33000psiASTM D695
Compressive Modulus (0.75" ID x 1.00" OD, Condition A)400kpsiASTM D695
Thermal Properties
ValueUnitsTest Method / Conditions
Temperature Index (0.75" ID x 1.00" OD, Electrical / Mechanical)125/125°C
Flammability Rating (0.75" ID x 1.00" OD, Condition A)HBClassUL Bulletin 94
Electrical Properties
ValueUnitsTest Method / Conditions
Electric Strength (0.75" ID x 1.00" OD, Condition A)200Volts/milASTM D149

Regulatory & Compliance