Lock barrel not turning properly when installed

[cyberbub]

Hi all,

I'm just a DIYer but reasonably savvy hopefully. I've tried to install a thumb-turn deadbolt for the first time, on my bathroom door, and am having a problem. I've drilled the 25mm hole (75mm deep) into the thickness of the door, drilled the 16mm hole through the width of the door, the deadbolt unit fits into the hole fine, got everything aligned with the spindle etc. My problem is that when it's held in my hand, the deadbolt turns smoothly in a single movement, but when installed in the door it's much harder to turn and it needs a clear 'two stage' movement for the bolt to extend fully. I'm assuming that the little 'catch' on the slider mechanism (**circled in red on the attached photo**) is scraping on the bottom of the hole, so I've chiselled a shallow 'channel' for it down the middle of the main hole, on the bottom edge. This hasn't helped though. What am I doing wrong? Thanks very much.

 

[Deleted member 174758]

A few starters: Is there any waste material remaining in the bore hole? Is the hole in the door parallel to the faces of the door (i.e. drilled square to the door edge)? Are the handle screws going in so deep that they are pinching the lock body (possibly needs a couple of mm filing off the pointed ends of the screws)? Is the lock spindle square to the door face? Is there any extra clearance required at the back of the handle for a spring or clip (i.e. is the 16mm hole big enough or slightly off centre of the spindle in the lock)? Try operating the lock with the spiindle but noo handle. Is the face plate sitting flat to the edge of the door (i.e. is the faceplate recess of consistent depth, not kicked up to one side or end)? If this is an old door it helps if the door edge is square as that can cream cracker your drilling

Sorry, lot of questions - hopefully an answer

 

[foxhole]

As J&K, reinstall but test at every stage, screw, to identify what’s causing the bind.