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Torq-Tender®
Mechanical Torque Limiters
This will show
you how to select the correct Torque Tender for your application.
If you wish,
you can use the Sizing
Software which will take your information and automatically
suggest the correct Torq-Tender.
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1-
Determine Torque:
Torque is a twisting force that causes rotation and can be theoretically
determined with the use of this simple formula:
Torque (in. lbs.) = 
For example, if your motor run speed is 100 RPM and its HP rating
is 1.5, then:
T (in. lbs.) = 
Your theoretical torque = 945 in. lbs.
A torque rating just below 945 in. lbs. should be selected. However,
this is only correct of the drive motor is the component which needs
the overload protection. If, for example, there is a reducer in
the system with a maximum input of 600 in. lbs. and the torque limiter
is to be used as a coupling between the 1.5 HP motor and the reducer,
the setting would then be under the 600 in. lbs. rating.
Consideration should also be given to potentially high start up
torques in the drive system. Most electric motors have start up
torques that exceed normal run torque, which makes it necessary
to select a torque as high as possible without exceeding the protection
limit.
(CAUTION: Because of inertia and/or energy
in power transfer equipment, torque limiters will not protect against
personal injury)
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2- Select The Type of Torq-Tender:
A. Shaft-To-Shaft Mount - Coupling Type
If you require a coupling type model, then the standard Torq-Tender
should be used. To order, the size of each bore along with the required
torque from the formula above is the only information required.
Since Torq-Tenders are bi-directional, the input of the unit is
not significant unless the unit is to be equipped with an actuating
pin assembly.
Go
to Torque Charts
Go
to Shaft to Shaft Mount
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2-
Select The Type
of Torq-Tender:
B. Through Shaft Mount - Bushed Type
To order, determine torque requirements from the formula above.
Also note shaft diameter and length. To use the basic Torq-Tender
with the bushing, you will need a shaft to extend through the complete
unit. Your drive or driven component (pulley, sprocket, etc., )
will be mounted on the long hub.
Also, refer to the specific torque and dimensional information.
Go to Torque Charts
Go
to Through Shaft Bushed Mount
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2-
Select The Type
of Torq-Tender:
C. End of Shaft Mount - Inboard Load Type "JF" or "J"
(Note: Use with timing belt drives, V belt drives, type A or B sprocket).
If your shaft is not long enough to extend through the entire length
of the unit, the face mounted JF model is designed to accept your
component with minimal shaft length. This model is designed for
motor shafts or gear reducer shafts where your sprocket, pulley,
etc. is face mounted to the Torq-Tender with four bolts. This model
supports itself with minimum overhung load and requires little modification
to existing equipment.
Offered
as an option is the model "J"
Go
to Torque Charts
Go
to JF Mounts
Go
to J Mounts
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2-
Select the
Type of Torq-Tender:
D. End of Shaft Mount - Outboard Load Type "SS"
In some applications your incoming drive shaft is not long enough
to extend completely through the unit. There are four Torq-Tender
models designed specifically for these situations where the unit
must be "self-supporting". The shaded portion shown in
the drawing above represents the Torq-Tender's one-piece drive shaft
which works with a Bronze Bushing to support the outer housing.
Go
to Torque Charts
Go
to Self Supporting (SS) Mounts
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3- Select Size (TT1X, TT2, etc.,) Based on Shaft Diameter and
Torque Required
Go
to Ordering Information
Go
to Top pf Page
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