Full Mortise Lock Information
Full Mortise Locks are a popular style, Lock-mechanism fits into a pocket in wood, This style is often desired for it's minimalist appearance as only selvedge is visible on door/drawer edge.
Use on Drawers, Doors and Desks.
were commonly used on drawers. Lock-bolt shoots up into case above drawer, a strike is rarely used.
are handed meaning right-hand or left-hand. Please note: some full 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.
were often used on roll top desks. These applications require a trap-door strike with the lock.
Measuring Half Mortise Locks:
Before looking for a replacement it will be necessary to measure your lock.
Please view diagram below 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.
Full Mortise Installation
Determine desired location of lock
Adjust position to allow for location of keyhole as it is often off center in lock
Lock should be positioned in middle of wood thickness, providing a wood edge around selvedge
Mark location of lock-selvedge on door or drawer edge
Hold lock-selvedge, at desired location, on wood thickness and trace outline
Inspect outline for accuracy , straighten lines where necessary
Trace lock-body outline into selvedge-mortise at correct position
Mortise can be slightly off as selvedge will conceal lock-body once installed.
Check lock with mortise, lock should sit in mortise with selvedge flush with wood surface
Strikes are rarely use with reproduction full mortise locks. 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
Mount lock in a mortised- pocket in wood thickness/edge
Selvedge edge should be level with top of drawer or edge of door
Attach with wood screws
For a finished appearance: mount an escutcheon/keyhole plate, on furniture front.