Page 1096 - Rollingbearings

25 Lock nuts
HM and HME metric lock Fig. 8
nuts HME lock nut, with recessed side face

HM and HME lock nuts (ig. 5): B 3

• have metric trapezoidal threads
• have eight equally-spaced slots located
around their circumference to accommo-
date an impact spanner (ig. 6)
• are located on the shaft by MS locking
clips (ig. 7)

When compared to HM lock nuts, HME lock
nuts have a recessed side face to accommo-
date axial displacement of CARB toroidal
roller bearings (ig. 8) Fig. 5 Fig. 9
HM and HME lock nuts can be reused, HM and HME lock nut Locking with a washer
provided they are not damaged A new lock-
ing clip should be used each time the corre-
sponding lock nut is reinstalled

Features and beneits
• Simple, stable and reliable fastening
element
• Wide range of sizes
• Easy to install and remove
• Available for thread Tr 220x4 to Tr 1120x8
(sizes 44 to /1120)

Fig. 6 Fig. 10
The locking principles HM and HME lock nut Locking with a plate

Lock washers, locking clips and locking
plates are simple, stable and reliable fasten-
ing elements

• Lock washers (ig. 3, page 1093) engage a
keyway in a shaft, or adapter sleeve
thread The washer locks the nut in posi-
tion when one of the washer tabs is bent
into one of the slots on the nut’s outside
diameter (ig. 9)
• Locking plates (ig. 4, page 1093) engage
a keyway in a shaft or adapter sleeve and
are attached to the side face of the nut by Fig. 7 Fig. 11
two bolts secured with locking wire A MS locking clip Locking with a clip
locking plate consists of a plate, two hex-
agonal head bolts with drilled heads and
lock wire to secure them (ig. 10)
• Locking clips (ig. 7) engage a keyway in a
shaft or adapter sleeve and one of the
slots in the outside diameter of the lock
nut Locking clips are attached to the nut
by a bolt (ig. 11)
25

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