Dynapar - Rotary Feedback products. Innovation, Customization, Delivery.

Innovation, Customization, Delivery

Dynapar encompasses the broadest line of trusted brands in motion feedback control, including Dynapar encoders and Hengstler brand incremental encoders and absolute rotary encoders, Northstar heavy-duty magneto-resistive and Heavy-Duty optical encoders and high-performance Harowe brand resolvers. Only Dynapar feedback solutions offer these world-class rotary feedback brands from one Global Supplier with 3 day delivery on most models for customer peace of mind.

Joliet Technologies is the preferred Dynapar Integrator for the Chicagoland area.

RIM Tach HS85 Digital TachometerRIM Tach® HS85 Digital Tachometer

Quick Specs…

  • Mounts easily to roller, sleeve, or ball bearing motors and can be used on non-motor applications, such as line shafts and conveyor shafts
  • Thin, pancake style design mounts to motor without bearings or couplings

Overview / Design Principle:

The HS85 digital tachometer incorporates state-of-the-art magnetoresistive sensing technology. The magnetically encoded signals provide pulse codes of A, B, and an optional index pulse Z, with complements (A, B, Z). These signals are solid for the life of the encoder. They do not exhibit the unreliable signal drift that requires a fault check on other digital tachometers. In addition, this technology is immune to common contaminants such as water, oil, grease, dirt, vibration, and overall harsh conditions of operation.

The HS85 was created as a solution to roller or sleeve bearing motors with excessive axial and radial play. This digital tachometer is ruggedly
designed with steel flanges, heavy duty motor style bearings, and cast iron housing. The mill duty construction is ideal for motor and nonmotor
applications, or where the motor casting is otherwise unavailable. As an example, the HS85 is perfect for mounting as a line shaft reference encoder. By virtue of design, the HS85 is more forgiving of older motors which are unable to hold precise tolerances.

The HS85 is shipped pre-assembled. The installation is quick and easy; just slip the unit over the motor shaft, tighten the clamp, and add the anti-rotation arm. The sensor alignment of the HS85 is entirely independent of the motor frame. Wiring is simple due to the industrial duty connectors. No field soldering or crimp pins are required. Simply strip conductor ends, insert and tighten the connector screws. The interchangeable stainless steel sensor modules are available in a wide variety of pulse counts. There are no field gap checks, axial alignments, or radial run-out checks required.

Features and Benefits:

  • Easy Installation
  • Rugged, cast-iron and steel enclosure and zero-speed, magnetoresistive sensing technology
  • Immune to grease, salt water, dust, and other contaminants
  • Heavy duty, double sealed, deep groove, radial ball bearings to tolerate axial and radial runouts


The © NorthStar brand RIM Tach HS85 is a mill duty, digital tachometer that accommodates large thru-shaft sizes (up to 4.5 inches or 115mm) and can easily mount to most AC or DC fan cooled motors. This digital tachometer offers the reliability, resolution, and flexibility characteristics for which NorthStar products are known.


Standard Operating Characteristics

Code: Incremental Pulses per Revolution: 60-2048
Phasing Sense: A leads B for Counter-Clockwise rotation (CCW) viewing encoder-mounted end
Quadrature Phasing: 90° ± 22°
Symmetry: 180° ± 54°
Index: 270° gated to falling B edge


Input Voltage Requirement: 5-15 or 15-26 Volts DC
Current Requirement: With Electrical Option L: 45mA typical per sensor module plus line driver load
With Electrical Option R: 65mA typical per sensor module plus line driver load
With Electrical Option 5: 65mA typical per sensor module plus line driver load
Output Signals: With Elec Option L: 5-15 V Line Driver, 150mA
With Elec Option R: 15 V Line Driver, 150mA
With Elec Option 5: 5V Line Driver, 150mA
Electrical Immunity: 2kV ESD, Reverse Polarity, Short Circuit
Connector: 10 pin industrial duty latching, sealed NEMA 4 &12, IP65; MS connector or pig-tail


Shaft Speed: 3,600 RPM
Mounting Configuration: Hollow Shaft mount with Anti-Rotation Tether
Housing Material: Cast Iron/Stainless Steel
Acceleration Rate: 3600 rpm/sec max
Allowable Shaft End-Play: 0.25” (Subject to RPM Limitation)
Allowable Shaft Runout: 0.010” TIR (Subject to RPM Limitation)


Operating Temperature Range: -20°C to +70°C
Storage Temperature Range: -40°C to +120°C
Humidity: to 98% RH (non-condensing)
Shock (Sensor Module): 1 meter drop test, 30 G’s Min
Vibration: 18 G’s @ 5-2000 Hz spectrum

Available Specifications:

Related Products & Resources:

For additional information or to receive a full-line catalog, contact your Dynapar representative at 1.800.873.8731 or visit their web site at: www.dynapar.com
Headquarters:1675 Delany Road • Gurnee, IL 60031-1282 • USA
Phone: 1.847.662.2666
Fax: 1.847.662.6633
Email: custserv@dynapar.com or dynapar.techsupport@dynapar.com
© 2009 Dynapar Corp. Printed in U.S.A. • Feedback Quick Reference Guide P/N# N-FLB130 (11/09) 5M

Call Joliet Technologies TODAY 

If you have any questions concerning Dynapar products, feel free to contact us:
Phone (815) 725-9696,
Toll Free (866) 492-9888,
Fax (815) 725-9393 or
E-mail info@joliettech.com

Joliet Technologies custom packages, integrates and engineers AC Variable Frequency Drives (VFD), DC Variable Speed Drives (VSD) and AC Drive Controllers using top of the line manufacturers, like ABB, Emerson-Control Techniques, Siemens and Saftronics (Fincor). Our custom drive packages are built to your specifications for your application. We specialize in large horsepower drive systems (500Hp and above). Call us at (815) 725-9696 or fax us at (815) 725-9393 or e-mail us or fill out an RFQ with your requirements. Serving the greater Chicagoland area and the World.