2018-Jenkins-Catalog

JENKINS SINCE
1907
QUeSTIONS? JUST CALL JENKINS.
800-438-3003 OR ANSWERS@JENKINS.COM
FAN SELECTION
& APPLICATION
We are ready to help you with your motor cooling fan
needs. When you know what you need, please specify
catalog number, quantity, and special machining with
your order. To help you choose, our OEM Fan table lists
the name of the OEM and shows the manufacturer’s part
in our stock. Our suggested Jenkins replacement part is
also shown. For older frames and other brands, we will
be happy to check our records to see if we can make a
recommendation. However, we strongly rely on your own
judgement to be sure a particular fan will fit the fan cover
and cause air to flow and cool your motor.
DIMENSIONS
Overall diameter (D) is most critical in determining air delivery
over the motor. Blade width or height (A) is also important, but
the number of blades is not significant. Be sure the fan blade you
choose clears the bearing housing OD, and the fan cover ID. All
catalog dimensions are given in inches. Tolerances are ± 1/8” on all
dimensions except bore.
MATERIAL
Aluminum (AL), Plastic (PL), and Steel (ST) fans are stocked.
We will cast special aluminum, brass and cast iron fans to order.
We buy our plastic fans from the motor manufacturers, except for
the 2-51 fiberglass-slip ring fan, which we manufacture.
Our aluminum castings are not balanced. We cast 356 Prime Alloy,
producing a hardness of approximately Rockwell B-60, suitable for
use on explosion proof motors. The plastic fans we stock are not
rated for use on explosion-proof motors. We do not recommend
attaching balance weights to any plastic fan.
BORE
We will bore any of our aluminum fans to ± 0.001” tolerance
(straight bore only). We recommend that you order your fan
to the same micrometer measurement as the motor shaft
journal. To install or remove the fan, warm it with a torch or in
an oven, and slip it on the shaft. Please specify keyway size if
desired. We do not recommend split hubs in aluminum fans.
The split concentrates the stress on the fan back plate, and
will encourage cracking failure unless the bore of the fan is
within a few thousandths of the shaft size. A “Maximum Allowed
Bore” is shown for each blank bore fan, except Series 11. Large
bores may weaken the hub, particularly if a keyway is required.
Our machining department meets the Calibration System
Requirements in MIL-STD-45662A.
FRAME
The frame shown is for 1200 and 1800 RPM motors except those
marked “TS” which are 3600 RPM motors. Fans shown for “T”
frames are safe for use with the same frame number in either “U”
frames or old NEMA frames. They are also safe to use with older,
higher-number fans as long as the rated horsepower is the same
or less than the horsepower of the “T” frame listed.
FAN COVERS
We currently stock Toshiba OEM fan covers, however, we
can supply fan covers from a variety of manufacturers such
as ABB, Baldor, General Electric, Leeson, Lincoln, Reliance,
Siemens Energy, Teco-Westinghouse, US Electric, WEG and
Worldwide Electric.
SPECIAL FANS
We have many fans and patterns in stock which are not illustrated
or listed. The best method of identification is to send in a sample
fan for us to match (even if it is broken). If we do not have a
pattern, we can make a metal or wooden pattern for complex
shapes. You are charged for our net cost in obtaining the pattern,
but we retain the pattern for future use. Our pattern making
charge is $40.00/hour, net, plus material costs.
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