Door handles don't rotate enough to open mortice latch

[Giblets46]

HI there,
have pruchased some replacement door handles, first problem I had was that the square drive shaft was slightly too big for the mortice latches in my doors, which I got round by using the old drive shafts.

However, on one of my doors I have found that the handle does not rotate enough to ensure the latch is fully recessed. I really don't want to be drilling loads of holes in my door, so is there any way of getting this to work? Are there any brands of mortice latch that don't need as much rotation to fully recess the latch? Or should I try to 'shape' the plate in the handle that limits rotation?
cheers

 

[kevindgas]

depending on how much more you need to rotate. if its a mm or two then yes you can file the plate to get the extra

 

[JohnD]

as you are using the incorrect spindles they are going to be a sloppy fit so there will be some lost movement. Try packing the ends of the spindles into the holes e.g. with wet newspaper. If that does the trick you can make a permanent fix with something that goes hard.

Or you could buy new latches, if they are just tubular mortice latches they are cheap enough.

Or try a dremel or something to increase movement on the handle, as you say.