Half Mortise Locks
Antique Furniture Locks are a classic type for drawers and doors hinged on left. They are great replacement locks due to their authentic detailing and appearance. Locks of this type were used on many periods of furniture. This vintage style are known as half mortise locks. Nice quality, locking mechanisms are a secure lever. Lock has steel box and brass plate. Made In England.
Use on drawers and doors hinged left. Medium Backset, distance to pin, is 11/16". See size tab for more measurements. Matching Lock for doors hinged right: Antique Furniture Locks distance to pin 11/16"
When using on doors: select according to side door is hinged on. Please note: keyholes are off-center requiring lock to be positioned accordingly when using on drawers. Left and right hand style of same lock size are keyed alike.
Matching Smaller Sizes
Half Mortise Drawer & Door Locks, doors hinged left small 1/2" backset
Half Mortise Drawer or Door Locks, doors hinged right small 1/2" backset
Strikes were rarely used with this type half mortise lock as wood was notched to accept bolt. However if preferred a generic brass strike is available separately.
Half Mortise Locks for Drawers and Doors
Half Mortise Locks are a popular style, frequently used on 18th & 19th century antique furniture. Lock-mechanism fits into a notched area in wood, Once installed only lock-plate is visible from furniture interior.
USE ON DRAWERS and DOORS
Drawer Locks were commonly used on drawers. Lock-bolt shoots up into case above drawer, a strike is rarely used.
Door Locks are handed meaning right-hand or left-hand. Please note: some half mortise locks are not available in both left and right options. When looking for door locks be sure lock is handed according to your needs.
- doors hinged on right - bolt shoots to the left.
- doors hinged on left - bolt shoots to the right.
MEASURING HALF MORTISE LOCKS:
Before looking for a replacement it will be necessary to measure your lock.
Please view diagram to determine how to measure your lock.
The backset measurement, is the most important measurement, must match precisely
Once the backset measurement is determined you can look at your various options.
If potential substitutes have different lock-body or lock-plate measurements cabinet work may be necessary to fit the lock.
INSTALLING HALF MORTISE LOCKS:
Determine desired location of lock
Adjust position to allow for location of keyhole as it is often off center in lock
Mark location of lock on drawer or door interior
Hold lock at desired location against drawer or door interior
Selvedge edge should be level with top of drawer or edge of door
Trace outline of lock on drawer or door interior
Trace outline of selvedge on drawer top or door edge
Inspect outline for accuracy , straighten lines where necessary
Again holding lock in position, trace lock-body
Cut shallow mortise for lock plate and selvedge with router or chisel
Selvedge and lock-plate should be flush with the interior wood surface once installed
Cut lock-body-mortise. Okay if off slightly as lock-plate will cover lock-body once installed. Be sure there is ample room for mounting screws to attach lock
Use of a strike is rarely necessary on drawers and doors. Traditionally a simple mortise was cut in the wood to accept the lock bolt.
Measure distance from top of lock-plate to center of key pin
Measure distance from side of lock-plate to center of key pin
With these two measurements locate keyhole on furniture front, make sure key pin is aligned with keyhole location
Drill small pilot hole at key pin location, hold lock in position and check to make sure hole lines up with key pin
Drill hole larger to accommodate key barrel
For a finished appearance: mount an escutcheon/keyhole plate, on furniture front.
If Using Brass Wood Screws
Care is required when installing brass screws. While these screws are the best match for most antique hardware however they are not as strong as steel screws. The screw is easily damaged if the hole is not properly prepared.
The best practice is to first drill a pilot hole. Use a drill bit slightly smaller than the overall width of the screw, including threads, to drill the hole. Then use a steel screw, the same size as brass screw, to “cut threads” in pilot hole, by screwing steel screw into and then out of hole.
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