Why Your Key Keeps Breaking Inside the Lock — Causes & Prevention
Few things are more frustrating than having your key snap inside the lock — especially when you’re rushing out the door or trying to secure your business after hours.
At Locksmith On Demand, we handle dozens of broken key extraction calls every month in Newmarket. Below, we explain the most common reasons keys break inside locks — and what you can do to prevent it from happening again.
Over time, keys lose their structural strength due to daily wear and metal fatigue.
Each twist slightly deforms the grooves until one day — snap! — it gives out.
- Your key bends easily
- It has small cracks or sharp edges
- You need to jiggle it to make it work
💡Tip: Always keep a spare key and replace worn ones before they fail.
If your lock is stiff or misaligned, it puts extra pressure on the key each time you turn it. Dirt, dust, or corrosion can block the pins, making your key twist under resistance.
Solution:
Use a professional locksmith to clean or rekey the lock. Avoid using WD-40 or oil-based lubricants — they can attract more dirt over time.
It’s surprisingly easy to grab the wrong key, especially when several look similar. Even a slight difference in the cut pattern can jam the key and cause it to snap inside.
Prevention:
Label your keys or color-code them. For businesses with multiple locks, consider switching to a master key system for simpler key management.
In Newmarket’s freezing winters, metal contracts — both the lock cylinder and the key.
This tightens the mechanism and increases friction, making the key harder to turn. Forcing it can cause it to break.
Tip:
Warm the key gently in your hand or pocket before inserting it, and never apply force if the lock feels frozen — call a professional for frozen lock service instead.
If a lock feels stuck, forcing the key will only make matters worse. Repeated heavy twisting can bend or snap the blade right at the neck.
What to do instead:
Try gently wiggling the key while applying steady pressure. If it won’t move, stop immediately and call Locksmith On Demand — we can extract the key without damaging your lock.
What to Do If Your Key Breaks Inside the Lock
- Don’t keep turning the key. You may push the broken piece deeper.
- Avoid using pliers or sharp tools. You could damage the cylinder pins.
- Call a licensed locksmith. Professionals have extraction tools to remove broken keys safely.
- Ask about rekeying or lock replacement if it happens often — that’s usually a sign of worn internal parts.
Our mobile technicians arrive quickly anywhere in Newmarket or the GTA, equipped to remove broken keys, repair locks, or cut new keys on the spot.
How to Prevent Future Breaks
Duplicate keys before wear becomes visible
Lubricate locks once every 6–12 months with graphite-based spray
Avoid heavy keychains that strain ignition or door locks
Don’t use your key for prying or turning bolts
Schedule a lock maintenance inspection annually
Frequently Asked Questions (FAQs)
Q1: Can I remove a broken key myself?
A: You can try if part of the key is visible, but avoid forcing tools into the lock. A professional locksmith can safely extract it without harming the cylinder.
Q2: Will I need a new lock after a key breaks?
A: Not always. In most cases, we can extract the key and rekey or repair the lock on-site.
Q3: Why do my keys keep snapping even after replacements?
A: This usually means your lock is misaligned or internally damaged, putting extra pressure on the key.
Q4: How long does key extraction take?
A: Most jobs are completed in 15–30 minutes, depending on the lock type and depth of the broken piece.
Q5: Do you offer emergency service for car keys too?
A: Yes — Locksmith On Demand handles automotive, residential, and commercial broken key extractions 24/7.
Why Call Locksmith On Demand
✔ Fast Mobile Key Extraction Service
✔ Licensed, Insured, and Experienced Technicians
✔ On-Site Key Cutting and Rekeying
✔ 24/7 Emergency Support in Newmarket & GTA
✔ Fair, Transparent Pricing — No Hidden Fees
If your key is stuck, broken, or jammed, don’t risk damaging your lock further.
📞Call +1 647 477 4108 for immediate assistance or to schedule a lock inspection today.