Quality and Autogard are synonymous with overload protection. The company's reputation
for high quality products is derived from over 40 years of design innovation and
production. Autogard products are manufactured to meet ISO 9001 using the latest
machine tools and high
TORQUE LIMITER SERIES 200
The Series 200 torque limiter is a state of the art mechanical device that will disengage
at a pre-set torque value.
The trip torque is set above the normal start-up and operating torque, but below
a torque setting which would normally damage the driving and / or driven equipment.
In the event of a jam, the torque limiter eliminates the threat of damage by disconnecting
the inertia in the drive train.
Drive balls (A) which are seated in detents in the drive plate and the slide plate
These are all held together under pressure from spring (D).
Disengagement on Overload
When the driven machine either jams or an overload occurs which is greater than the
torque setting, the balls roll out of their seats and force apart the drive plate
(B) and the slide plate (C).
The balls are retained by the cage plate (E) and roll freely on the flat surface
of the drive plate (B) and slide plate (C)
Re-angement occurs in one of three ways depending upon which reset type is selected.
Type AC - Automatic Random Reset
The ball detents in the drive plate (B) and the slide plate (C), as well as the retaining
holes in cage plate (E) are equally spaced on the same pitch circle diameter so that
the balls will roll into the next detents after tripping in either direction. Immediate
shutdown is required to prevent wear of the detents.
Type ACT- Automatic Synchronous Reset
They are positioned in a scattered pattern so that the balls must return to their
original position before they can reset.
Re-engagement will occur within two revolutions in other direction. Immediate shutdown
is required to prevent wear of the detents
Type AF – Free Wheeling Disengagement
As with the AC the detents in drive plate (B) and slide plate (C) are equally spaced.
The retaining holes in the engaging plate (E) are elongated so that as the balls
roll from the detents they can follow a cam profile onto a different running track
away from the detents. The AF can run at higher speeds as the balls will not ratchet
in the detents. Re-setting is achieved by manually locking and reversing the drive