Heavy .051″ aluminum plates, edges rounded for maximum withstanding voltage, and 5/16″ diameter aluminum tie rods: 1/4″ cadmium-plated steel shafts; laminated phosphor bronze contact springs; and steatite insulation. Type “D” – overall width: 4-1/4″ – height: 4″ – height bottom to shaft center: 2-5/32.”
Dual types have center rotor connection for better balance. End frames tapped 8-32. Three holes, for panel mounting – brackets furnished for chassis mounting.