Thermo Scientific APEX 100 User Manual page 298

End Cap Method
Placing a closed-ended plastic cap on one end of the roller shaft breaks the electrical
connection between the shaft and bearing assembly, as shown below.
Roller Bearing Isolation Method
Isolating the bearing assembly requires isolation of the housing and mounting bolts. An
insulating sleeve is used to electrically isolate the bearing housing from the conveyor
frame. Plastic inserts are used to isolate the mounting bolts from the bearing assembly,
as shown below.
Plastic Bearing Roller
The plastic bearing assembly is one of the easiest designs to implement. Most plastic
bearings are available in standard mount designs. However, some plastic bearings
contain a metal sleeve in the mounting holes, which is internally connected to the
bearing raceway. With this bearing, plastic inserts should be used to create the electrical
isolation.
The Next Step
Now that you have completed the electrical and mechanical set up for your conveyor
application, please go to the "Getting Started" section on page 11 to learn how to
operate your newly installed APEX detector.
Page 298 Thermo Scientific APEX User's Guide