The inside of a deadbolt can be operated with a thumb turn or key depending on which option you order.
Door lock cylinder types.
The relevant difference between these two deadbolt door lock types is that the single cylinder has a keyed cylinder on one side of the door whereas the double cylinder makes use of a keyed cylinder on both sides of the door.
Cylindrical lever locks can be operated with a key or through the combined use of a key and a push button.
It s a reflection of the durability of the internal door lock types not the amount of security they provide.
It s defining feature is its shape see image left.
Some exterior door locks are designed to automatically lock when the door closes.
It has a circular head that houses the lock mechanism and an oval bottom.
Another type of cylinder most of us use every morning when heading out the door is the deadbolt cylinder.
This lock is the most common deadbolt type.
Locks that are grade 1 offer the highest level of strength and security.
Single cylinder uses a key or rotating thumb turn on one side that actuates the locking mechanism.
For instance push button lever locks are another popular common commercial door lock type but not all of them utilize a cylinder.
Types of cylinder locks.
Single cylinder double cylinder and single cylinder with a thumb turn.
It s mainly found in the uk and europe hence the name euro cylinder.
It is mounted inside the door and has a twist knob in the interior and key cylinder on the exterior of the door s face.
The double cylinder is also mounted internally.
Type of front door lock back door lock sometimes internal doors a euro cylinder lock is commonly fitted to upvc composite doors and is used with multi point locking systems and are also fitted to some mortice deadlocks and sashlocks on timber or aluminium doors.
There are three varieties of these locks.
From the outside of the door a key must rotate the cylinder to retract the deadbolt.
Find lockset cylinders and assigned or shared use keypad locks.
Single cylinder locks are far more prevalent but some homeowners opt to use double cylinder deadbolts for the added.
Types of cylinders deadbolt cylinders.
You will likely see these in sliding doors that can only be locked and unlocked from the inside.
By far the most recognisable and easily replaced cylinder lock on the market is the euro cylinder lock.