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© Copyright 2006, Sargent & Greenleaf, Inc.
WHEEL: an assembly, usually in the form of a circular disc,
having a gate and drive pin whose locations may be set to
selected positions to permit the
user to change the combination.
GATE: the cutout in the periphery
of the wheel that is engaged by
the fence on the lever assembly.
DRIVE PIN: a pin extending from the underside of the drive
cam and from all but the #1 wheel in
a wheel pack; it transfers motion to
the next component in the wheel pack.
WHEEL PACK: a set of wheels, fly and
isolation (spacing) washer supported by
a torque adjuster or tension washer and
secured with a retainer.
WHEEL POST: a component, cast as part of
the lock case or cover, on which the wheel
pack is assembled and about which the
wheels rotate (a bearing surface).
WHEEL, KEY CHANGE: a component
containing both an inner and outer hub
with meshing teeth; when disengaged
by a key, the hubs’ relationship may be
changed to a selected number by dialing.
KEY CHANGE WHEEL CONSTRUCTION: a change key is
inserted and turns the cam, which disengages the arm teeth
from the inner hub to permit changing the combination.
WHEEL NUMBER: each combination lock wheel is desig-
nated by a number, indicating which number of the combination
it corresponds to; the first wheel contains the first number of
the combination, the second wheel contains the second number
of the combination, and the third wheel contains the third
number of the combination; in a three-wheel lock, the third
wheel is always adjacent to the drive cam.
X-RAY PROOF WHEEL: the outer area of the wheel where
the gateway is located (the wheel case) is made of Nylon, Lexan,
Delrin or Celcon to prevent X-ray methods of determining the
combination of the lock.
Model 6730, 6735, 6738, 6741 Mechanical Combination Lock
Combination Lock Glossary
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