Product Manual

Basic worm gear reducers can be easily modified with mounting accessories to
meet application needs. Four examples are shown.
NEMA C flange reducers are of two basic types based on how the
motor and reducer shafts are coupled. The most straightforward type,
and the most commonly used in smaller horsepower applications, has a
“quill” input – a hollow bore in the worm into which the motor’s shaft is
inserted. The other type, involving a reducer having a solid input shaft,
requires a shaft-to-shaft flexible coupling, as well as an extended NEMA
C flange to accommodate the combined length of the shafts.
Installation and Application Considerations
Mounting: In the majority of cases, gear reducers are base-mounted.
Sometimes, mounting bolts are driven directly into pre-threaded holes
in the reducer housing. Other times, accessory bases are used. Output
flange mountings are also available.
-78-
Quill-input reducer with output
flange added
Vertical output shaft, extended-
height base, solid input shaft with
no mounting flange
Shaft-input reducer in verti-
cal position, deep NEMA C
flange, plus “J style” base
Quill-style input reducer with
added base; “worm over”
mounting position