Master Lock Company makes seven basic cylinder sizes/types for use in our padlocks;
1. A small diameter cylinder for some of our laminated locks.
2. A four pin cylinder for our laminated locks.
3. A five pin cylinder for our laminated rekeyable locks
4. A six pin cylinder for our ProSeries
®
locks.
1. The small diameter cylinder is generally referred to as the number W7
cylinder and is used in various products where the available space is
limited. This cylinder is used in the number 7 laminated padlock, the
gun lock, etc., and is generally not accessible for rekeying. In those
cases where it can be rekeyed, it uses the same pins used in the first four
classes above. Those pins are available in our #291 pinning kit found
on page 19. See page 14 for service procedures.
2. The four pin cylinder is generally referred to as the number W1
cylinder and is used in the number 1, 3, 5 laminated padlocks, and
many other products. In many cases it is not accessible for rekeying,
but when it can be rekeyed you may use our #291 pinning kit.
Servicing procedures may be found on page 14.
3. The five pin cylinder is generally known as our number W27 cylinder
and is found in our laminated rekeyable locks such as the number 21,
24, 25, and 27. It may be rekeyed using our #291 pinning kit shown
on page 19.
There are times when you may want to use a four pin cylinder in a lock
designed for the five pin cylinder because of keyway compatibility.
That can be accomplished by using the 27-0334 plug extension which
adapts the four pin cylinder to the five pin length.
4. The six pin cylinder is referred to by two different part numbers,
depending on the number of pin chambers that are pinned. When
pinned with only five pins, it is called the W6000 and if all six pins are
used it is called the W7000. This cylinder is found in our ProSeries
®
products and may also be rekeyed using our #291 pinning kit.
Effective mid-2001, Master Lock Company will implement a new six
pin cylinder and key. The cylinder will change from a crimp to an
E-clip which reflects tighter tolerances between the plug and shell. The
new key has a radiused blade bottom. This running change should have
no effect on key operation from old to new cylinder types.
You can use two of the 27-0334 plug adapters to install a four pin
cylinder where a six pin one would normally be required. It isn't
possible to install a five pin cylinder where a six pin is required. See
page 14 for keyways and part numbers.
Cylinders and Retainers
11
5. A cylinder for our number 19 lock.
6. Cylinders compatible with various door hardware locks
made by others.
7. SFIC cylinders.