The KMT/KMTA nuts are locked in place with three brass
securing-pins that are uniformly distributed around
the circumference, which in turn are attached at an
angle to the nut. The angle at which the pins are worked
into the nuts matches the internal thread's profile
angle. While manufacturing the nut's internal thread,
the end face of the securing pin is likewise provided
with the thread profile.
The nuts are locked by pressing the securing pins against
the shaft thread using setscrews. Subsequently the axial
forces are absorbed by the thread flanks and not by
the securing pins. The thread flanks are not relieved
and the nuts do not deform. Securing the nuts against
shifting is only effected through the friction between
the securing pins and the shaft threads.
The nuts can be used as often as desired and retain
their precision because the securing pins are not deformed
by the cut-thread profile, meaning the shaft threads
are also not damaged. As a shaft groove is superfluous,
the shaft diameter can be made smaller and the costs
for the groove are omitted.
Compensation for inaccuracies
The three securing pins, uniformly distributed around
the circumference, facilitate setting an exact right-hand
angle while securing, provided the play between the
nuts and the shaft thread allows this. Inaccuracies
from components attached to the shaft can be compensated
with the nuts.
The KMT nuts have grooves distributed around the circumference
and are provided with key surfaces up to size 15 on
top of that. For mounting, you can use open-end wrenches,
hook spanners and striking-face wrenches. The KMTA nuts
have bore holes both on the circumference and on the
face. You can mount them on the circumference using
C-spanners with studs or on the face, for example with
adjustable face-pin spanner wrenches.
The difference between KMT - KMTA
The KMTA shaft nuts differ from the KMT shaft nuts in
their outer form and partially also in their thread
leads. They have smaller overall diameters and smooth,
cylindrical jacket shells. They are especially intended
for applications involving limited installation room.
- Material: High strength steel
- Surface treatment: black-finished
- Securing pin: hard-drawn brass
- Adjusting screws: in accordance with DIN 913/ISO
2343, property class
- Nut thread tolerance: 5 H
- Recommended shaft thread tolerance: 6g
The right to technical changes is reserved.