Diversified Plastics Supplies High-performance Part to Dynapar

HS35R Encoders are used in machine applications that require precise shaft rotation such as
industrial controls and robotics. It is a position feedback device that attaches to a motorʼs
rotating shaft and communicates angular position readings to the machineʼs computer controller.
Diversified Plasticsʼ shaft-sizing insert is the connection between the encoderʼs center bore and
a motorʼs shaft. Six slots cut on one end of the insert permits clamping to the motor shaft. “The
insert performs two functions. First, it insulates the encoder electrically and thermally from the
motor,” says Jeff Nemeth, senior marketing communication specialist at Dynapar. “Second, itʼs
the most rugged encoder on the market and is used in very rugged and demanding applications
such as elevators, material handling and automotive manufacturing. It has larger bearings to
handle heavy loads and Diversified Plasticsʼ shaft-sizing insert helps protect the encoder
bearings from stresses imposed by the direct, heavy loads.”

The insert, similar to a collet adapter, is made from Ryton®, a brand name for Polyphenylene
Sulfide (PPS). Ryton PPS is a lightweight, extremely rigid material that can be molded or
extruded. Its high performance characteristics and resistance to expansion and contraction
make it ideal for parts requiring tight tolerances. Rather than molding the shaft-sizing insert,
Diversified Plastics machines the part from Ryton PPS extruded rod stock. “The machined parts
must hold a tolerance of +0 to .001 inches,” says Doug Ruckle, engineering manager at
Diversified Plastics. “Additionally, part concentricity must be maintained due to the high
rotational speed of the encoder.”

Diversified Plastics is an injection molder of high-precision, close tolerance, small- to mediumsized
injection molded components for medical device, filtration, aerospace and a variety of
other industrial markets. The 32-year-old company is a full-service injection molder, from design
assistance and mold construction, to intricate molding and clean room assembly. Diversified
Plastics is ISO 9001:2008 and 13485:2003 certified, and UL registered.

Ryton is a registered trademark of Chevron Phillips Chemical Company