A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. Disengaging the racks from the key followers allows rekeying of the lock cylinder.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. Disengaging the racks from the key followers allows rekeying of the lock cylinder.

A lock re-pinning assembly including two or more housings and a mounting block. Each housing is configured for use with a corresponding one of a plurality of lock cylinder shells. Each of the housings includes a cylindrical chamber and a channel. The chamber is configured to receive the body of the corresponding shell, and the channel is configured to receive the tower of the corresponding shell. The mounting block includes a mounting block having two or more sections. Each section is configured for use with a corresponding one of a plurality of lock cylinder plugs. Each section includes a cavity configured to receive an end of at least one of the housings, and a cylindrical follower bar having a diameter substantially equal to a diameter of the corresponding plug. Each of the housings is releasably engageable with the mounting block at each of the plurality of sections.

A locking system may include a first cylinder portion may be extended along a main axis, a second cylinder portion may be extended along the main axis, a front plate may be coupled and rotatable with the first cylinder portion, a plurality of code pins, a plurality of spring-loaded driver pins, a main shaft may be disposed within a first central hole, a second central hole, and a key. The key may include an elongated key shaft and a plurality of key needles may be extended parallel with the elongated key shaft. The main shaft may be configured to be coupled to and rotatable with one of the first cylinder portion and the second cylinder.

A rekeyable lock cylinder with a cylinder body and a rotatable plug assembly is provided. The plug assembly includes a plurality of first key followers and a corresponding plurality of first racks for operation of a first locking bar. Additionally, the plug assembly includes a plurality of second key followers and a corresponding plurality of second racks for operation of a second locking bar. The first and second key followers and first and second racks can be rekeyed while the plug assembly is disposed within the cylinder body. The first and second key followers face each other within a keyway opening of the plug assembly and are independently operable.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

A rekeyable lock cylinder with a cylinder body and a plug assembly. The lock cylinder includes a plurality of key followers and a corresponding plurality of racks disposed in the plug assembly. The lock cylinder includes, for example, a locking bar for blocking rotation of the plug assembly with respect to the cylinder body to prevent unlocking of the rekeyable lock cylinder with an unauthorized object. In some embodiments, the locking bar is configured such that torqueing the plug assembly with an unauthorized object applies force to the locking bar without translating such force to the plurality of racks. This type of arrangement enhances torque resistance of the lock cylinder against attempted forced entry.

A reprogrammable lock cylinder including a stator, a rotor rotatably mounted in the stator, a tumbler assembly mounted in the rotor and operable to permit rotation of the rotor when a first key is inserted into the rotor, the tumbler assembly having a reprogramming state in which the tumbler assembly is operable to be reprogrammed by a second key to match the second key, and an insert configured to cause the tumbler assembly to adopt the reprogramming state in response to presentation of a magnetic tool to the rotor, and to prevent the tumbler assembly from adopting the reprogramming position in absence of the magnetic tool.

A rekeyable lock cylinder with a cylinder body, an inner sleeve, and a plug assembly is provided. The plug assembly includes a plurality of key followers and a corresponding plurality of first racks and second racks disposed in carriers. The first racks correspond to operation of a user key and the second racks correspond to operation of a master key. As such, the lock cylinder is usable in a user/master key system. Disengaging either of the first or second racks from the key followers allows rekeying of the lock cylinder for the user key or the master key.

A lock core device includes a receiving sleeve and a lock cylinder rotatable relative to the receiving sleeve. The lock cylinder is formed with a keyway to selectively receive a first type key with a first section contour or a second type key with a second section contour different from the first section contour. A first side of the keyway is formed with a first abutting structure to allow the first type key to abut against in order to position a bottom of the first type key relative to the keyway along a height direction of the keyway. A second side of the keyway is formed with a second abutting structure to allow the second type key to abut against in order to position a bottom of the second type key relative to the keyway along the height direction of the keyway. The first and second sides are opposite sides.