Salt no threat to Astrosyn's sealless stepper motors
9 March 2011
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Thanks to their advanced anti-corrosion coatings, the latest range of hybrid stepper motors from Astrosyn International Technology can operate in wet and corrosive environments despite not being sealed.
A range of corrosion proof coatings applied to every surface and component, both inside and outside, enables the motors to withstand prolonged contact even with salty water.
Traditionally, motors intended for harsh environments are fitted with seals on their shafts and end caps. However, temperature variations in particular mean that sooner or later these allow in moisture and contaminants which eventually lead to corrosion and failure.
Stepper motors are particularly susceptible to the effects of corrosion, owing to the extremely small air gaps between their rotors and stators.
The coatings and materials used in the new Astrosyn motors are tailored to each component. For example, the permanent magnets, aluminium endbells and steel laminations are made from upgraded materials before being given an appropriate coating.
A further advantage of eliminating seals is that seals around the shaft introduce additional friction which causes a significant reduction in torque.
Suitable applications for the motors include mobile phone masts, marine antennas, food processing equipment, chemical industries and the automotive sector.
For further information, please contact David Melder:
Astrosyn International Technology Ltd, The Old Courthouse, New Road Avenue, Chatham, Kent, ME4 6BE, UK Tel: +44 (0)1634 815175 Fax: +44 (0)1634 826552 Email: astrosyn@btinternet.com Web: www.astrosyn.com
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