Specification Sheet

MS1861 Series
Bottom Rail Deadbolt
Operation
360° turn of key or thumbturn throws or retracts bolt(s). Key
can be removed only when bolts are in a positively locked
or unlocked position. Lock accepts any standard 1-5/32"
diameter mortise cylinder from either or both sides. Cylinder
must have MS
®
dimensioned cam.
Specifications
CYLINDER BACKSET
• Minimum backset is approximately 2-1/4" for the MS1861-
01 with vertical bolt only. The MS1861-02 with vertical and
horizontal bolts requires placement of cylinder centerline
5-3/4" from nose of door. Both have cylinder center 1-7/8"
above bottom edge of door.
CASE
• Steel with corrosion-resistant plate, measures 1" x 6" x 1-13/16".
BOLTS
• 3/8" diameter. Stainless steel vertical threshold bolt has
13/16" throw. Hardened steel horizontal bolt has 1-1/8" throw.
STRIKES
• In metal installation, 7/16" drilled holes in threshold are
required. For MS1861-02, drilled holes are also required in
jamb or opposite door. For wood, metal plate with 7/16" hole
must be provided for each bolt.
CYLINDER CAM
• MS1861 Bottom Rail Deadbolts are operable by any standard
1-5/32" diameter mortise cylinder with MS
®
cam dimensioned
as shown. Cylinders with MS
®
cams can be readily obtained
from most cylinder manufacturers. See CYLINDERS section
for cylinder make, thumbturn and trim ring information.
STANDARD PACKAGE
• Individually boxed with mounting screws. Cylinders and/or
thumbturns available separately. Shipping weight:
MS1861-01: 1-3/4 lbs., MS1861-02: 2 lbs.
MS1861 SERIES BOTTOM RAIL DEADBOLT
FULL GLASS
GRADE 1
E8211
The MS1861 Bottom Rail Deadbolt provides maximum
security with MS deadbolt over-center/pivot locking
mechanism. It utilizes hardened steel bolts for the limited
space of ultra-narrow stile doors.
Function
Using the same over-center/pivot locking mechanism as the basic MS®
deadbolt, the MS1861 lies horizontally in the bottom rail of ultra-narrow stile
doors which have insufficient vertical space for a lock, and tempered glass
doors which have no stile at all. The hardened steel cylindrical bolts allow
simple drilled strike holes of a relatively small size to minimize the nuisance
and danger presented by some threshold strikes in collecting debris or
snagging on high-heeled shoes. MS1861-02 locks either single-leaf or pairs
of doors. Not recommended for wood doors.
B
LOCK CASE
CAM
TR
A
DOOR CENTERLINE
*TOLERANCE: ± 1/16
DOOR STILE
TRIM RING
CYLINDER
TR* = A + .125 – B TR* = A + .132 – B
FOR MS
®
LOCKS: FOR 4500 SERIES LATCHES:
“Dim A”
R
R
1830
2190
2290
MS1837
MS1850S
MS1850SN
MS1861
MS1950
1875
MS
+
1890
4300
4510
4530
4900
4781
4920AN
8300
8400
8650
DEADLOCK
DEADLATCH
SERIES
SERIES
EXIT
DEVICES
1870
1870HM
1877
3080
3090
FLUSHBOLTS
TRIM
THIS CAM AVAILABLE FROM:
ADAMS RITE
ARROW
ASSA
BEST
CORBIN RUSSWIN
DORMA
FALCON
KABA-ILCO
MEDECO
SARGENT
SCHLAGE
WEISER
YALE
.120"
3.0mm
.182"
4.6mm
.334"
8.5mm
.620"
15.7mm
R
.721"
18.3mm
.950"
24.1mm
.334"
8.5mm
.800" ± .005"
20.3mm ± .127mm
.850" ± .005"
21.6mm ± .127mm
THIS CAM AVAILABLE
FROM ABOVE CYLINDER
MANUFACTURERS
ON SPECIAL ORDER
(OR MAKE FROM
STANDARD CAM)
THIS CAM AVAILABLE
FROM ALL CYLINDER
MANUFACTURERS
(STANDARD CAM)
Narrow stile doors require a trim ring to fill the gap remaining between the cylinder
shoulder and stile when a standard mortise cylinder is used. If the security of the
hardened steel Adams Rite MS4043 Cylinder Guard is not required, this ring may be
simply a length of 1.171 I.D. tubing. Its length varies depending on door thickness or
cylinder make and number of pins. The specific length required can be quickly
determined by the following formula:
DIMENSIONS OF CAM TO OPERATE:
DIMENSIONS OF CAM
TO OPERATE:
4070 SERIES DEADBOLT
DIMENSIONS OF CAM
TO OPERATE:
2331 DEADBOLT
CYLINDER TRIM RING FOR NARROW STILES
“ TR ” is trim ring length.
“
A ” is cylinder height (less shoulder but including cam).
“
B ” is one-half of door thickness.
MS1861-01
MS1861-02
800.872.3267 • Fax [phone]
10027 S. 51st Street, Ste 102
Phoenix, Arizona 85044
www.adamsrite.com
ARM-014-9/14
DEADL OCKS
DL-17