Jammed Mortice Lock.

[Smokin Joe]

The lock on the back door to the garage has jammed shut. I can get a jigsaw blade in the gap 'tween door and frame, does anyone know if the tongue is likely to be hardened or should it cut easily?

 

[MikeG]

If it is a British made lock, or anything to British standards, you've got no chance of cutting it. If it's a bit of cheap Chinese junk.........well.........give it a try.

How does a lock jam shut? What happens when you insert the key?

 

[gbb]

4 inch Disc cutter and a slitting disc may be your friend...

Or knock the hinge pins out...

 

[Cycleops]

One of these might be the only answer but if you do make sure this chap isn't on the end of it.

 

[Smokin Joe]

If it is a British made lock, or anything to British standards, you've got no chance of cutting it. If it's a bit of cheap Chinese junk.........well.........give it a try.

How does a lock jam shut? What happens when you insert the key?

The key won't turn.

 

[DCLane]

The key won't turn.

WD40 / Penetrating oil in everything - key slot, lock, the lot. Leave it overnight and try again.

 

[screenman]

Have you given it a heavy dose of oil?

 

[slowmotion]

4 inch Disc cutter and a slitting disc may be your friend...

Or knock the hinge pins out...

A 1mm steel cutting disk can cut pretty much anything, especially over-priced bike locks.
https://www.screwfix.com/p/metal-cu...ck/2585v#product_additional_details_container

Locksmiths just drill out the key mechanism by aiming a (say) 8-10mm HSS drill right into the key slot. It's really fast and doesn't louse up the door or frame.

 

[Salty seadog]

One of these might be the only answer but if you do make sure this chap isn't on the end of it.
View attachment 441783

Depends which end.

 

[classic33]

A 1mm steel cutting disk can cut pretty much anything, especially over-priced bike locks.
https://www.screwfix.com/p/metal-cu...ck/2585v#product_additional_details_container

Locksmiths just drill out the key mechanism by aiming a (say) 8-10mm HSS drill right into the key slot. It's really fast and doesn't louse up the door or frame.

Some locks now have hardened steel plates to stop that. Notably Yale & Chubb.


@Smokin Joe, five lever lock?
Does the key stick at the same point in either direction. Are all keys for the lock in one piece.

 

[Smokin Joe]

I have slung a load of oil in, I'll see what happens tomorrow.

 

[Dirk]

A few grams of PETN should shift it.

 

[Dave 123]

Have you got a spade?

Put spade blade under the under the bottom of the door and try to release the weight from the bottom of the door by standing on spade handle.
The hinges may have dropped on the door, putting weight onto said lock.

Worked for me once.

 

[Salty seadog]

Have you got a spade?

Put spade blade under the under the bottom of the door and try to release the weight from the bottom of the door by standing on spade handle.
The hinges may have dropped on the door, putting weight onto said lock.

Worked for me once.

I'd say the spade is probably in the shed.

 

[raleighnut]

You just need to jer, jer, jer, jiggle it a bit Granville