rotary encoder magnetic ring
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MAGNET RINGS HEAVY DUTY APPLICATIONS

OUR MAGNET RINGS6 1 – DESCRIPTION6 2 – MATERIAL7 2.1 – Surface treatment & adhesion

To meet the needs of its global customers on land, in the air and at sea, Hutchinson has been designing, developing and manufacturing high-performance solutions for over 160 years. Our innovations cover a wide variety of demanding markets: automotive, aerospace, defence, energy, rail and industry in general. Hutchinson is a global leader in anti-vibration systems, fluid management and sealing solutions, our group stands out for its multi-market and multi-expertise approach, a source of synergies and added value. PRECISION SEALING SYSTEMS BODY SEALING SYSTEMS FLUID MANAGEMENT SYSTEMS...

2 – HUTCHINSON PRECISION SEALING SYSTEMS Hutchinson Precision Sealing Systems designs and manufactures sealing solutions for dynamic applications and magnetic encoders measuring movement and position of rotating shafts and moving objects. Our project team relies on constant experimentation and innovation, to develop solutions that are perfectly adapted to customer needs. Our business unit has an international footprint with production and sales sites in Europe, NAFTA (Mexico and USA), Brazil and across Asia in China and Japan. Services - Worldwide production - Continuous R&D product...

Our magnet rings are made of a metal insert bonded to a magnetic rubber compound. It responds efficiently to industrial applications, combining elastic properties and strong rubber/insert adhesion needed in extreme environments. The magnet rings are compatible with different sensor technologies such as Hall Effect and magneto-resistive. Metal Insert Multi-track Magnet Ring Our solutions allow high measurement accuracy. They are integrated in position and speed control systems such as encoders, motors, and actuators. We develop and manufacture magnet rings with a customized magnetic pattern....

2 – MATERIAL 2.1 – Surface treatment & adhesion Bonding technology by Hutchinson vs gluing Thanks to a special expertise in rubber adhesion, we can design the metal and the bonding agent system according to customer needs. 2.2 – Rubber We design our magnetic rubber compounds with an expertise of more than 160 years. Our elastomer technology provides a good resistance to mechanical stress due to its elastic properties. Our HNBR compounds offer solutions for high temperature. They are based on anisotropic magnetic ferrite technology to get the best magnetic and mechanical performance. Their...

Sensor housing Sensing element Magnet Ring Reading diameter Reading aera The sensing element is located in the Reading Area. Ri/Re: Reading Radius min/max Ag1/Ag2 : Air Gap min/max Magnet Ring Magnetic profile The outline of the magnetic profile is important as it allows us to define the recommended reading area in order to improve the magnetic performance. Magnetic Amplitude The distance between the surface of the magnet ring and the sensing element within the sensor housing is refered as the magnetic air gap. 3030 2525 Recommended Reading Area Reading position

Temperature effect The operating temperature affects the magnet. For each degree Celsius increase, the ferrite remanence decreases by 0.19%. This effect is reversible as it returns to ambient temperature. Signal strength The magnetic signal is stronger when the air gap is smaller. Pole width The pole width affects the magnetic flux amplitude. It is important to know the air gap to calculate the recommended reading area and get the desired magnetic strength. Magnetic Amplitude Reading position

PARTS SELECTION 1-TECHNICAL SUPPORT All our parts can be pre-designed with a magnetic simulation. We offer on request numerical simulations that support accurately your designs and test their performance. Feasibility studies or mockup parts can be realized upon request to fit customer needs. Our experts can advice you about the reading position to fit the magnetic profile of your part. A parametric study takes every parameter into account to possibly optimize the part including the rubber volume. Thickness Height Other factors that the numerical simulation covers is the magnetic compound,...

The axis is always consider to be at the left of the profile. Height We design several profiles to fit different applications. The magnetic field (B) is along the rotational axis. The magnetic field (B) is orthogonal to the rotational axis.

3 – SIZE CHARTS 3.1 – Axial references Profile

PARTS SELECTION

11/2021 - Ph. : HUTCHINSON, Adobe Stock Hutchinson - Paulstra SNC Z.I. d‘Etriché, Route d‘Aviré 49500 Segré-en-Anjou-Bleu - France www.hutchinson.com / paultsra.seal@hutchinson.com +33 2 41 94 5