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Re[4]: Scott gap
Wow! Good score! Thanks for digging that up, Dan. That sounds
perfect!
paul
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Subject: Re: Re[2]: Scott gap
Author: Tesla List <tesla-at-pupman-dot-com> at INTERNET
Date: 4/13/00 11:54 AM
Original Poster: "Dan Kline" <ntesla-at-ntesla.csd.sc.edu>
<snip>
Here's some material offered by McMaster-Carr I've been thinking about
using for SRSG rotors. It might be good for this type of gap too, maybe. ;)
A 1/2" thick, 12" x 12" square is $12.54
Electrical Grade Fiberglass (GP03)
Color: Opaque red
Temp. Range: 0° to 400° F
Tensile Strength: Excellent
Enhanced electrical insulation properties and a flame-resistant additive
make this material ideal for electrical applications. It is a glass
fiber-reinforced polyester. Material meets UL-94V0 standards.
Impact Strength: Excellent
Excellent electrical insulator
Use indoors
Easy to machine
Notice that the temperature goes to 400° F, and it's listed as easy to
machine.
Other specifications:
Tensile Strength: 10,000 psi
Impact Strength: 8.2 ft.-lbs./in.
Dielectric Strength: 400 V/mil
Tracking Index: 500 volts
Durometer: Barcol 50
Coefficient of Thermal Expansion: 2.010 -5 in./in./°C
Weather Resistance: Material is not weather resistant. Resin will break
down over long periods of exposure to the outdoors.
Processing--
Machinability: Can be easily machined. Can be cut with a hacksaw, diamond
grit saw blade, and carbide tip saw blade. Holes are easily created using
conventional drill bits and milling bits. A dust mask and gloves should be
worn when working on this material.
Welding: Not recommended.
Scratch Resistance: Moderate.
Chemical Resistance: Use with mild detergents. Do not use with strong acids.
The original GP03 page is at http://www.mcmaster-dot-com/pdf/106/3088.pdf
The extra specifications are at http://www.mcmaster-dot-com/pdf/106/8549KAC1.pdf