Specialised Rotary Materials for Navigation, Aerospace & Aviation
Rotary Joint Contacts for Low-Noise Slip Ring Assemblies:
Low-noise slip ring assemblies are used to transmit minute electrical signals in rotating equipment like microwave antennas, radar receivers, sonar receivers, rotating thermocouple read-outs, and rotating strain gauge read-outs. The slip ring is attached to the rotating shaft and is usually made of coin silver, silver-plated copper, or bronze. If a connection with low resistance, low voltage drop, and low electrical noise is required, the stationary brush or contact can be made of Silver metallized carbon. These assemblies are also called rotary joints, microwave rotary couplings, and RF rotary joints.
Applications include air traffic control radar, telecommunications systems, and satellite communication systems. A noise level a low as 0.01 mv is possible on a 5 mv signal. Rotating shaft speeds can be as high as 10,000 ft/min.
Non-Welding Contact Tips:
Silver metalized carbon non-welding contact tips are used to interrupt critical circuits where there is the possibility that heavy overload could cause other contact materials to arc and weld in the closed position. This situation occurs in circuit breakers, controllers, contactors, and relays due to possible short circuits or lightning strikes.
Silver metalized carbon is also good for sliding contacts where long wear-life and low contact resistance is required. This occurs in elevator contacts where high amperage circuits must be reliably opened and closed.
DC Motor Brushes for High Altitude:
Ordinary carbon/graphite brushes show a high wear rate when running at high altitude (over 20,000 ft), in vacuum, or in dry atmospheres (dew point -30°F, or - 34°C). However, Silver metalized carbon brushes with additive film formers can run on coin silver, silver, copper, or bronze commutators and provide long wear-life, low voltage drop and high current carrying capacity.
Slip Rings & Rotary Joints:
Safecon supplies through its channel partners slip rings and rotary joints for variety of applications to be used in Wind Turbines, Navigation & Aerospace, Water Treatment, Packaging and Medical Devices. Safecon products cater for a variety of speeds, power/signal transmission and environmental conditions. Safecon offers bespoke design solutions. In many instances, standard parts can be adapted to provide a new product.
