Door Lock Replacement: When a Full Swap Is the Right Call

When Replacement Beats Rekeying

Rekeying keeps your lock and changes the pin tumbler stack inside the cylinder so old keys stop working. Replacement removes the whole unit - cylinder, latch, and trim. Choose replacement when:

• The latch drags even after graphite lubricant - a sign of worn springs or a bent spindle.
• The lock was damaged in a break-in attempt, even if it still turns.
• You want a different type: knob to lever, adding a deadbolt, or a keypad.
• You want a stronger ANSI grade.

If the lock works fine and you only need old keys dead, rekeying is usually the simpler job.

Know What Is on Your Door

The right replacement depends on what is there now:

• Cylindrical knob or lever: the most common home lock, mounted through a round cross bore about 2-1/8 inches wide.
• Deadbolt: a separate bolt above the handle; single-cylinder versions take a key outside and a thumbturn inside.
• Mortise lock: a rectangular case set into a pocket in the door edge, common on older homes and storefronts; a new case must match the old dimensions and function.
• Euro cylinder: a profile cylinder held by one long fixing screw, with a cam that works the gearbox; common on uPVC and patio doors.

Also note the backset - the distance from door edge to bore center - almost always 2-3/8 or 2-3/4 inches; many new latches adjust to either.

How to Choose the New Lock

Three things separate a solid replacement from a cosmetic one:

• ANSI/BHMA grade. Grade 1 is the strongest tier, built for commercial duty; Grade 2 suits most homes; Grade 3 is the basic minimum.
• Bolt design. A deadbolt with a full 1-inch throw and a hardened steel insert resists prying and sawing far better than a spring latch.
• The strike plate. Most forced entries defeat the frame, not the lock, so a heavy-gauge strike with 3-inch screws reaching the wall framing adds real security.

For several doors, ask about keyed-alike locks so one key runs them all.

What Replacement Day Looks Like

A locksmith starts by measuring backset, bore diameter, door thickness (standard doors run 1-3/8 to 1-3/4 inches), and bolt-to-strike alignment. If you are switching hardware styles, the old holes may not match; a professional can adapt the prep or cover mismatched marks with a wrap plate.

Safe prep: photograph both sides of the lock and the door edge, and note the brand stamped on the latch faceplate. Do not force a seized cylinder or drill anything - that turns a swap into a door repair. Hardware and labor vary by lock type and door condition, so call (916) 913-5080, describe what is on your door, and confirm the service can help before any technician is scheduled.

Frequently Asked Questions

Do I need to replace the whole lock, or can I just rekey it?

Rekey when the lock works smoothly and your only goal is making old keys useless - after losing a key or a change in tenants. Replace when the mechanism is failing: a latch that drags after lubrication, a wobbly knob, or visible damage. Replace also to gain features the old lock lacks, like a keypad or a higher ANSI grade. A locksmith can assess the cylinder and tell you which applies.

Will a new lock fit the holes already in my door?

Usually, yes. Most residential doors are prepped with a 2-1/8 inch cross bore and a backset of 2-3/8 or 2-3/4 inches, and most new locks ship with adjustable latches that fit both. Problems come up when you switch categories - a mortise or old rim lock leaves a prep a standard cylindrical lock will not cover. A locksmith can adapt the door cleanly.

What makes one replacement deadbolt stronger than another?

Look at three points. The grade: ANSI/BHMA Grade 1 hardware survives more operating cycles and heavier strikes than Grade 2 or 3. The bolt: a full 1-inch throw with a hardened steel core resists sawing and prying at the door gap. The strike side: a reinforced plate anchored with 3-inch screws into the framing matters most, because frames usually split before quality bolts fail.

Call (916) 913-5080 about door lock replacement.