8100 Zero Speed Switches

8100 Series zero speed switches are designed for service in industrial applications requiring protection against rust, rain, and hose directed water. 8100 Series switches are internally geared for slow speed applications: shaft input speeds of 0.5 to 24 RPM. Recommended method of driving is by split or flexible coupling.

Contacts actuate in either direction of shaft rotation. Housings are painted with an epoxy based powder coat to provide rust and corrosion resistance.

Driving torque required is approximately 4 inch ounces. All 8100 models should be direct driven through a split or flexible coupling to avoid end pressure, shaft deflection and side loads on the bearings.

NEMA 4/4x and NEMA 7 & 9 (EP-1 Series)

Available housings: Aluminum (AL), Cast Iron, (CI) and Explosion Proof (EP).

Approximate shipping weight:
Aluminum housings: 4 lbs.
Cast Iron housings: 8 lbs.
Explosion Proof housings: 13 lbs.

Selecting a Switch:

1. Consult the first two columns of the chart and select the speed range that most closely matches the critical shaft speed of your application.
2. From the last 3 columns, choose the model number with the appropriate contact configuration.
3. Choose a housing that best suits your needs.

Add "AL" in front of the model number for Aluminum housing.
Add "CI" in front of the model number for Cast Iron Housing.
Add "EP" in front of the model number for FM approved Explosion Proof.

4. Now pick the mounting style from the list in the upper right corner of the table you have been choosing from.
5. Click on the appropriate switch Series Model Number (8121, 81212, 8122, 81222, 8131, 8132 or 8156 Series) in the top left hand menu or below to order online, or call 1-800-745-6551 and ask for Sales. We will be happy to quote prices, assist you with your selection or take your order.

Application
Running
Speed
R.P.M.
(input
to
Speed
Switch)

Approximate
Contact
Operating
Speeds - RPM

Mounting Styles
Type B - See Base Mount (see drawing 8100 1B) Type F - Flange Mount (see drawing 8100 2BFK) Type FK - Flange mount with pilot (see drawing 8100 2BFK)
Contacts
S.P.D.T	D.P.D.T	S.P.D.T.(2) Direction Indicating
Model Number

N
O
T

F
I
E
L
D

A
D
J
U
S
T
A
B
L
E

Approximate
Trip-Point
On Shaft
Input Speed
Acceleration

Approximate
Drop-Out Point
ON Shaft
Speed Loss

Min.......

Max.

Slow
Loss

Rapid
Loss

1.5

0.5

8121-s

81212-S

8131-S

0.5

2.5

0.5

Approx. 4 Sec.
After Shaft
Rotation Failure

8121-5s

81212-5s

8131-5s

1.5

Approx. 3-5 Sec.
After Shaft
Rotation Failure

CI8122-5s

CI81222-5s

CI8132-5s

Visit www.SpeedSwitch.com for more detailed product information. If a specific model is not listed to fit your needs, Control Concepts, Inc. can custom design a zero speed switch to your specifications.

If you have questions or need further assistance, please call us toll-free at: 1-800-745-6551 or email us at: Sales@ControlConceptsUSA.com.

Control Concepts, Inc.

100 Park Street
Putnam, CT 06260
U.S.A.

Phone: 860-928-6551
Fax: 860-928-9450