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.

Series HSD35 Shaftless Optical EncoderSeries HSD35 Shaftless Optical Encoder

Quick Specs…

  • Hollowshaft design eliminates mounting bracket, flexible coupling and install labor
  • Bore is electrically and thermally insulated
  • Single and dual output (with optional high current line driver)
  • Choice of stamped metal or swivel rod tether
  • High resolution unbreakable disk
  • Industrial Duty Latching Connector
  • NEMA 4 / IP67
  • Two Year Warranty

Overview / Design Principle:

The NorthStar brand Series HSD35 Sealed Hollowshaftencoder is designed for easy installation on motor or machine shafts. Its hollowshaft design eliminates the need for a flexible shaft coupling, mounting bracket, flower pot, or flange adapter. This not only reduces the installation depth, but also lowers total cost.

The Series HSD35 Sealed Hollowshaft is equipped withan unbreakable disk that resists contamination and meets the demands of the most severe shock and vibration generating processes. Its floating shaft mount and spring tether eliminate bearing loads and flexible shaft couplings to eliminate wear and maintenance.

Series HSD35 has complete electrical protection from overvoltage, reverse voltage, and output short circuits. In addition, the Series HSD35 is not only electrically & thermally isolated, but also environmentally sealed withshaft seals at both sides.

Features and Benefits:


  • Unbreakable code disks for 1 to 2048 PPR
  • Flexible mounting
  • Minimizes bearng loads
  • Heavy duty shaft seals; optional extra heavy duty rugged shaft seals
  • Sealed connector – no soldering
  • Insulated from motor housing/shaft temperatures at or above 125°C
  • Direct shaft size minimizes wobble caused by universal inserts


  • Overvoltage, reverse voltage, & output short circuit protection
  • Noise immunity to EN50082-2
  • Bore is electrically isolated from shaft currents
  • Cast housing maximizes noise immunity and durability

Applications/ Industries:

The HSD35 sealed hollow shaft encoder is ideal for motor and machine applications at resolutions to 2500PPR. Choice of stamped metal or swivel rod tether provide flexible mounting for a wide varity of installations:

Manufacturing, Assembly, Material Handling and any other where a precise, reliable feedback signal is required. (e.g. Vector Motor and Drive Feedback, Converting Machinery, Packaging Equipment, Paper Processing)


Standard Operating Characteristics

Code: Optical Incremental
Pulses per Revolution: 1-2500
Phasing Sense: A leads B for Clockwise rotation (CW) viewing shaft clamp end
Quadrature Phasing: 90° ± 22.5°
Symmetry: 180° ± 18°
Index: 180° ± 18°


Input Voltage Requirement: 5-26 Volts DC
Current Requirement: 100 mA typical plus line driver load
Output Signals: With Elec Option 0, 1, 2, 4, A & B: 5-26 V Line Driver, 40mA
With Elec Option 3: 5 V Line Driver, 40mA
With Elec Option 5: 5 V Line Driver, 100mA
With Elec Option 6: 5-15 V Line Driver, 100mA
Frequency Response: 0 – 100kHz Data & Index
Electrical Immunity: 1kV ESD, Reverse Polarity, Short Circuit
Connector: 10 pin industrial duty latching, sealed NEMA 4 &12, IP65


Shaft Speed: 3,600 RPM; Max up to 3600 RPM
Mounting Configuration: Flexible mount with anti-rotation arm
Housing Material: Stainless steel and epoxy coated zinc alloy
Available Shaft Sizes: 6 mm to 1.25” thru-shaft style available. See ordering table for sizes.
Allowable Shaft End-Play: ± 0.050”
Allowable Shaft Runout: 0.025” TIR (Subject to RPM Limitation)


Operating Temperature Range: -40°C to +70°C
Storage Temperature Range: -40°C to +90°C
Humidity: to 98% RH (non-condensing)
Shock: 50 Gs for 11 ms
Vibration: 18 Gs @ 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.