Avtron HS45 Encoders

Avtron HS45 Encoders

Magnetic Durability, Worldwide Compatibility

  • No fragile optics, no glass disks
  • All electronics fully potted/encapsulated
  • Cast aluminum heavy duty housing
  • 3-5X heavier duty bearings
  • Insulated from motor shaft currents
  • Immune to magnetic and electrical interference from motors and brakes
  • Mechanical Overspeed Switch Option
  • 3 Year No-Hassle Warranty
Outline Drawing
Avtron HS45 EU-SMART Encoders are magnetic, hollow shaft, heavy duty encoders (incremental rotary quadrature encoders) for any mounting application including NEMA motors (incl. GE, Marathon, US Motors) and European-style motors such as ABB and Siemens.  Also available:  AV45 solid shaft encoder to fit European B-flanges (85mm), and foot mount applications and severe duty AV685 encoders. 

The HS45 offers clamp-style and (rear) center-bolt mounting options.  Clamp-style fits shafts from 5/8" to 1 1/8" [16mm-30mm]; center-bolt mounting is available for 16mm (straight) and 17mm (cone/taper shaft).  Clamp-style mounting utilizes a convenient field-changable sizing sleeve and provides shaft current isolation.  Center-bolt styles feature insulated ceramic ball bearings to prevent shaft current damage.

The HS45 is designed for use in rough environments with constant exposure to temperature extremes, water, oil, and dirt. Its high-power output circuits with universal 5-24V power are fully protected against surges and wiring errors. The onboard diagnostics warn of any signal quality issues before these problems cause downtime on your machine.
Operating Power: Volts: 5-24VDC; 100mA, no load
Output Format: A Quad B with marker (A,A, B,B, Z,Z )
Second Isolated Output: Optional
Frequency Range: 0 to 165 KHz
Maximum Instantaneous Current Output: 3000mA*
PPR: 8-5000
Speed: 5000 RPM Max. std., for higher speeds, consult factory
Enclosure: IP65
Electronics: Fully Encapsulated, IP67*
Temperature: -40° to +100°C*
Vibration: 18Gs
Shock: 100Gs
Chemical: Polyurethane enamel paint protects against salt spray, mild acids, and bases.

*see manual for specification details
  • Direct replacement for Hubner HOG8, 9, 10, Leine & Linde 861, 862, 865, and many others
  • Fits US motors with shafts from 5/8" to 1 1/8"
  • Fits European motors with 16mm straight and 17mm taper shaft center-bolt systems
  • Full protection against wiring errors and short circuits, surges and reverse voltage
  • High-power outputs for long cable runs
  • Diagnostic LED & alarm output contact option
  • Dual isolated output option (mix and match PPRs as needed)
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV32, AV6A, AV6M, HS25A, HS35A, HS6A, HS6M, K661,

Mill Duty

AV32, HS35M, K661, M185, M3, M3(small), RAHS35M

Heavy Mill Duty

AV115, AV125, AV45, AV5, AV56, AV56S, AV67, AV85, AV850, AV850Test, AVSK, Carlen Replacement, HS45, K661, M4, M4(small), XR115, XR12, XR125, XR45, XR4F, XR5, XR56, XR85, XR850, XR97, XRB1, XRB2

Severe Mill Duty

AV12, AV30, AV485, AV5, AV685, Carlen Replacement, HS40, K661, M484, M6, M6C, M7, XR12, XR485, XR5, XR685, XR97, XRB1, XRB2,
Avtron's HS45 encoders directly replace and provide a great upgrade from competitive models, including:

BEI:  HS35, XHS35 encoders

Dynapar:  HS35, HS35R encoders

Northstar:  HSD35, HSD37, HSD38, HS56, Magcoder, MH encoder

Leine and Linde:  861, 862, 863, 865 encoders

Baumer Hubner: 
HOG 75
HOG 9, HOG 9 G
HOG 10, HOG 10 G, HOG 10 + DSL, HOG 10 + FSL
HOG 11, HOG 11 G
HOG 12
HOG 131
HML 131 M
HG 16 encoders

And other hollow shaft mount encoder models, shaft sizes 5/8"-1 1/8" [16mm-30mm] including center-bolt 16mm and 17mm 10:1 taper/cone shaft mounting,
including older Avtron models: M3, M3-3, M3-4, M3-5, M4, M4-4, M4-5

For direct model replacements, try our cross reference page
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In This Section

  • A Quad B

    A Quad B refers to the set of output quadrature signals from an incremental quadrature encoder to indicate speed and direction, including complements: A, A NOT, B, B NOT (, , , ). Most Avtron encoders offer A Quad B output at no extra cost.  For more information on quadrature- Wikipedia: http://en.wikipedia.org/wiki/Quadrature_phase

  • Axial Shaft Movement

    Motor shaft movement in or out, relative to the ends of the motor. Often motors that use roller or sleeve bearing construction have more axial shaft movement. Most Avtron modular encoders tolerate +/- 0.050" of axial movement maximum. Use hollow shaft encoders for high axial movement motor styles, such as MD motors. Most competitors’ modular encoders tolerate much less axial movement than Avtron products.

  • Encoder

    A device which indicates position and speed via a set of digital outputs. Incremental encoders output quadrature (A Quad B) signals, and may add a marker pulse once per revolution.  Absolute encoders typically indicate position via a digital message, a set of parallel outputs, or analog values.

  • Heavy Mill Duty

    Heavy Mill Duty encoders are designed to withstand temperature cycling, extreme temperatures, contaminants, bearing loads, and physical force.

  • Hollow Shaft

    Hollow Shaft encoders mount by passing the shaft of the motor into or through the encoder. Hollow shaft encoders are easy to mount and replace but are vulnerable to damage. Also, the weight of the encoder must be considered for small motor shafts < 0.75" diameter. Avtron offers a full range of hollow shaft encoders, including: AV685, HS25A, HS35A, HS35M, M3, M4, M6, M7, XP45.

  • Industrial EPIC

    The preferred encoder connector of most users in North America. It contains a full size terminal strip and, unlike the MS connector, requires no soldering for quick field connections. Avtron offers pin-for-pin exact replacements for competitors’ models using industrial EPIC® style connectors. EPIC® is a registered trademark of the Lapp Group.

  • Magnetic Encoder

    Magnetic and magnetoresistive encoders typically use a magnetized rotor with north and south poles lined up around the perimeter of the disk. A magnetoresistive sensor detects the transitions, and these are the counts or pulses generated by the encoder. Magnetic encoders withstand dirt, dust, water, and temperature changes far better than optical encoders.

  • Shaft Runout

    The wobbling motion produced by a shaft that is not perfectly true and straight. Shaft runout is often abbreviated T.I.R. (Total Indicated Runout).

  • Stub Shaft

    The portion of the shaft (often on the non-drive end of the motor) used to mount an encoder. To add an encoder to a motor or other shaft that lacks enough extra shaft length to install the encoder, an additional shaft length is added. The stub shaft is threaded into the center of the motor shaft, or the existing motor shaft is enclosed in a sleeve that grips the shaft. Avtron offers many standard and custom stub shafts.

  • Torque Arm

    A type of anti-rotation arm used to mount hollow shaft encoders to large frame motors. It features a threaded rod for adjustable radius.

  • Wide-Gap Technology

    Avtron encoders use special optical sensors and magnetoresistive sensors, combined with proprietary circuit designs to allow the sensor to be located much farther from the magnetic rotor or optical disk. This eliminates sensor crashes and makes mounting easy and forgiving of mechanical variation.

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