
DCY3S
ERA 3* High Security Euro Cylinder
Fitting Instructions
Change a cylinder
If the cylinder has been removed, using a ruler, measure from the centre of the cam to the edge of the cylinder on the
Internal side (INT) and then measure from the centre of the cam to the edge of the cylinder on the External side (EXT) in
mm. Note: Your cylinder may be longer on one side than the other. E.g. 37mm Internal and 40mm External. You do not need to
measure the INT side on a Single cylinder.
To measure a cylinder, whilst still in the door, using a ruler, measure from the centre of the screw hole to the end of cylinder
(see diagram overleaf). Measurement (INT) is the centre to the edge of the cylinder which is inside facing. Measurement (EXT) is
the centre to the edge of the cylinder which is outside facing.
Measure a Cylinder
Euro Profile ThumbturnEuro Profile DoubleEuro Profile Single
Internal Dimension
(INT)
EXT.
ER20110
KM 553031
TS007 2014+A1:2015
INT.
BS EN 1303:2015
1 6 0 1 0 C 6 D
External Dimension
(EXT) Internal Dimension
(INT)
External Dimension
(EXT)
External Dimension
(EXT)
EXT.
ER20110
KM 553031
TS007 2014+A1:2015
33.0
17.0
EXT.
ER20110
KM 553031
TS007 2014+A1:2015
INT.
BS EN 1303:2015
1 6 0 1 0 C 6 D
28.0
32.8
Key opening from both sides of the door.
Controlled access internally and externally.
The first size in the part number (as
indicated) is the Internal (INT)
measurement:
AA
A
A
E.g. DCY3SED3740PCSKSS
Key opening externally and thumbturn
internally. For controlled access externally
and easy turn internally. The first size in the
part number (as indicated) is the Internal
turn side (INT) measurement:
E.g. DCY3SET4537PCSKSS
Key opening externally only. No
requirement to operate internally. The
first size in the part number is always 10
(INT), the second size (as indicated) is the
External (EXT) measurement:
E.g. DCY3SES1035PCSKSS
To remove your existing cylinder,
open the door. With the key
inserted into the cylinder, rotate
slightly to align cam with cylinder
body to allow installation.
On the open edge of the door, look
for the larger screw which falls in
line with the bottom of the
cylinder and remove / loosen to
allow cylinder to be removed from
the door.
Measure each side of the existing
cylinder in mm (see above), be
sure to note which is the Internal
(INT) and External (EXT) side of
the cylinder to ensure you get the
correct size. Purchase your new
ERA 3* High Security Cylinder.
EXT.
ER20110
KM 553031
TS007 2014+A1:2015
INT.
BS EN 1303:2015
1 6 0 1 0 C 6 D
Internal Dimension
(INT)
External Dimension
(EXT)
A