SIT-LOCK® Keyless Locking Devices

SIT-LOCK^® locking assembly unit consists of four pieces with two inside double-cone rings, joined through a set of tightening screws. It is recommended for medium torque requirements and although it is not self-centering, it can be easily assembled and disassembled.

Locking elements consist of one internal and one external tapered ring. They are designed to work in combination a clamp flange, which can be bolted on hub or shaft depending on application need. The number of locking screws depends on the torque to be transmitted. SIT-LOCK^® 2 requires very small axial installation dimensions. Up to 4 units can be arranged behind each other, allowing high torque to be transmitted.

Locking assembly with single taper design. Consists of two tapered rings and a spacer. It has minimum overall dimensions in virtue of the reduced thickness of the cones. SIT-LOCK^® 3 is suitable for applications where small diameter hubs are requested. It is recommended for mid-high torque requirements and is self-centering.

During the installation of the unit no axial displacement of the hubs on the shaft occurs.

Suitable for high torque requirements and is self-centering. Recommended for applications that require high transmission values and excellent centering capabilities such as belt drums.

Locking assembly with single taper design. It is suitable for high torque requirements. Provide good concentricity and self-centering. A small axial movement of the hub during the installation operation may occur. Applications in need of an accurate axial positioning are not recommended with this type of locking assembly.

Locking assembly with single taper design. It is suitable for high torque requirements. Provides good concentricity and self- centering. It is recommended for medium torque requirements and is self-centering. The flange design prevents axial movement during installation.

Locking assembly with single taper design. Provide good concentricity and self-centering. A small axial movement of the hub during the installation operation may occur. Applications in need of an accurate axial positioning are not recommended with this type of locking assembly. SITLOCK^® 6 is suitable for applications with medium torque requirements.

Locking assembly with single taper design. Provides good concentricity and self-centering. It is recommended for medium torque requirements and is self-centering. The flange design prevents axial movement during installation. Suitable for applications with medium torque requirements, which need very precise axial positioning.

Locking assembly with single taper design. The flange design prevents axial movement during installation. SIT-LOCK^® 8 has a very small axial dimension, is self-centering and has been designed to suit various shaft diameters although the overall dimensions are the same. SIT-LOCK^® 8 is recommended for applications with medium torque requirements, which need good axial positioning. The limited number of screws allows for fast installation.

Consists of two tapered rings and a lock nut. Due to the simple design, very fast assembly/disassembly is allowed. SIT-LOCK^® 9 is suitable for applications with small to medium torque requirements.

SIT-LOCK^® 10 are shrink disk couplings with double taper design. They offer a very easy angular timing and axial adjustment of shaft ends. They transmit high torque and bending moment without keys and offer a low-cost solution for shaft-to-shaft rigid connection.

Shrink discs are external locking devices, which are installed over hub projections. By locking the screws, radial pressures act on the hub allowing an effective and solid connection. Recommended for medium and high torque. SIT-LOCK^® 11 is also in versions “SPLIT” and “HALF” for special applications.

SIT-LOCK^® 12 is self-centering unit. Convenient series, it is suggested, only for big quantities, in the applications with medium torque requirements.

SIT-LOCK^®13 is very close to the standard type SIT-LOCK^® 9 but manufactured in a longer execution. It is made of two tapered rings and a locking nut.

SIT-LOCK^® 14 are shrink discs for external, series “14”, are characterized by a single tapered ring instead of opposite tapers of the 3 pieces shrink discs SIT-LOCK® series “11”. The SIT-LOCK^® 14 Shrink discs offer better concentricity and centering and very good balancing. These features make the series highly suitable for mid to high speed applications. SIT-LOCK^® 14 are manufactured in five different types.

Suitable for servomotors and small pulleys. It gives an axial force, similar to the clamp load of the screws, and an axial movement that can be used to set ball bearings.