| Dynapar Introduces Large Bore Hollowshaft Encoder |
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Gurnee, IL – March 31st, 2009--Dynapar announces the introduction of the NorthStar HS60 large bore hollow-shaft encoder. The new encoder features large-bore construction capable of accommodating motor shafts up to 2-7/8” in diameter, ideal for mill-duty motor applications. The encoder also features improved sealing and proven magneto-resistive sensing technology for tough environmental conditions.
Perfect for Vector-Duty Motors
NorthStar’s large bore hollow-shaft design of the HS60 makes it ideal for use on TEFC (Totally Enclosed, Fan Cooled) vector-duty motors, or large motors without a C-face provision for accessory mounting. Unlike competitive encoders with carbon-steel hub shafts, the HS60 features an all-stainless steel hub for corrosion resistance, which rides on oversized sealed bearings spaced farther apart for greater load-bearing capability and long life. A dual-split clamping collar is utilized instead of setscrews, which provides a more positive shaft engagement for high acceleration or reversing applications. The encoder body is hard-anodized aluminum, and in conjunction with the included swivel rod tether provides electrical isolation against motor shaft currents.
Improved Sealing for Tough Environments
Multi-stage sealing utilizing O-rings, sealed bearings, and choice of either labyrinth-type or v-ring shaft seals protects the encoder in wash-down applications. In addition, both front and rear shaft seals are shielded by a factory-installed cover, designed to protect against debris and damage. Another welcome feature is that the assembly fasteners don’t penetrate the sensing cavity, eliminating a secondary ingress point. As with all NorthStar magneto-resistive encoders, the HS60 features fully sealed & encapsulated electronics for the ultimate in environmental protection. Even in the event of seal failure due to damage or accelerated wear, the magneto-resistive sensor is unaffected by moisture, unlike traditional optical encoders.
Reliable Sensor and Electronics
The HS60 uses NorthStar’s proven magneto-resistive sensor and electronics. The encoder features full differential line driver outputs (A, B, and Index channels) and is capable of driving the signal hundreds of feet reliably without using a repeater or amplifier. Dual isolated outputs are also available for redundancy or driving multiple devices off the same motor shaft from a single encoder. A solder-less latching connector with ½” NPT fitting for conduit entry applications is standard, as is the choice of a military-style connector or cable exit.
Price and Availability
The NorthStar HS60 is made in the U.S.A. and built to order. The encoder is immediately available and list pricing starts at $1250. For OEM applications and volume pricing, contact a Dynapar representative at 800-873-8731.
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