metal slitting saw for a lock

I have a mortice lock that has jammed. It is a BS3621 with brass bolt having steel rollers. It is a narrow stile model with a complex sliding and pivoting mechanism.

I think I will have to cut through the bolt. I have a multicutter but it is incredibly slow to go through even a nail with the "multipurpose" blades, and an angle grinder but my blades are quite thick and might damage the door and frame.

I have seen slitting "diamond" disks that make a narrower cut but I wonder if these are easily broken, especially when they hit the steel.

Anybody had recent experience of this, and can make a recommendation?

TIA

 

my dewalt 18v cutoff tool[grinder] uses 1mm or may be 1.2mm thick ultra thin 115mm disc
similar to this dc410
https://duckduckgo.com/?q=dewalt+cut+off+tool&t=ffsb&iax=images&ia=images&iai=http://content.propertyroom.com/listings/sellers/seller1/images/origimgs/dewalt-dc410-heavy-duty-cordless-cutoff-tool-1_101120161849124211433.jpg

 

A 1mm x 115 dia slitting disc in an angle grinder will work fine here.....on the odd occasion I have had to remove the guard to get in line. Eye protection necessary!
John

 

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=metal+slitting+disks&_sacat=0

 

https://www.powertoolworld.co.uk/bosch-metal-cutting-discs-125mm-pack-of-10-2608603255#gref
what ever 1mm ss cutting disc your machine takes

 

Ive sometimes gone up a size as well to get some extra depth but have have skinned the fingers a few times,

 

as an aside
i have had a night latch where the door was snibbed on the inside or double locked on the outside then slammed shut so check the snib or the other side isnt double locked

 

Thanks!

I have a big stack of ordinary disks, so I will double-check the measurements (mine are dimpled) and get some slitting disks.

It's the back door of the garage, so I will have to cut through the internal padbolts of the up-and-over to get in. My reciprocating saw should do that.

 

did you check its not double locked and snibbed
it can take several attempts to get both in the release position as in
both onn door wont open
outside on door wont open
inside on door wont open
the automatic tendancy is to return to the same position as you just found it
and whilst you may never double lock it from the outside because it wont open you will automatically double lock it because it didnt work the normal way

 

no, it's a mortice deadlock.

5 lever

 

oopps sorry you did say
have you thought about grinding off the hinge pin heads and knocking them out a much easier job

 

recently fitted on 3 x expensive PVD stainless ball-bearing hinges

 

aaahhh no easy solution

is there no window you could go through

 

Found it easier to kick in the door and repair the frame damage.

 

I once fitted a new cylinder for my mum's "yale" night latch. She came home one day, put the key in and it would only turn about 45 degrees. Somehow the double lock kicked in and no one in the house could get out.

Took me about an hour of fiddling with the key to disable the double lock.

I now routinely disable the double lock feature.