Composed of two half-conical rings, an inner ring and an outer ring. It is particularly suitable for applications requiring a wide tolerance.
SIT-LOCK® Keyless Locking Devices
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SIT TORQUE-FLEX® narrow “XP” high-performance belts are manufactured in accordance with European standards ISO 4184 and DIN 2215. Designed for high-speed operation on small-diameter pulleys and short center distances, they are also suitable for use in multiple V-belt drives where high shock loads and heavy loads are encountered. No special selection is required for multiple drives, as they are manufactured according to the Matchmaker® System , which ensures tighter production tolerances compared to regulatory limits.
- Profile: XPZ-XPA-XPB-XPC
- Static conductor (ISO 1813)
- Temperature: -20/+70 °C
- Traction members: Vytacord (high-strength polyester)
- Composite: Wingprene
- Guaranteed dimensional stability
- Greater flexibility (molded sprocket)
- The reinforced tension members
- Matchmaker® System
Available with standard V-pulleys made of DIN 1691 GG20/GG25 cast iron, with solid shaft, for mounting SER-SIT® tapered bushes, preconfigured with oversized hub for self-locking units or according to customer specifications.
SIT-LOCK® lockless clamping bushings: Available configurations
Section
CAL1 execution Not self-centering

CAL2 execution Not self-centering

Composed of two tapered rings, it is suitable for applications that require smaller dimensions.
CAL3 execution Self-centering

Comprised of a cut inner ring and outer ring, and a spacer which prevents the hub from moving in relation to the shaft when tightening the screws. This locking device is particularly suitable for applications which require low hub pressures.
Recommended for use with aluminum hubs or hubs with lower mechanical properties.
CAL4 execution Self-centering

Composed of two tapered rings and one outer slit ring. It is particularly suitable for applications that require high torque transmission.
CAL5A execution Self-centering

Composed of an inner ring and outer ring, both with slits. This type of locking device is particularly suitable for applications that require excellent hub-to-shaft concentricity and perpendicularity.
CAL5B execution Self-centering

Composed of an inner ring and outer ring, both with slits. This type of locking device is particularly suitable for applications that require good hub-to-shaft concentricity and perpendicularity. It is also used for locking hubs with lower mechanical properties.
CAL6 execution Self-centering

Clamping bushing with unique cone design. Provides good concentricity and good self-centering. A small axial movement of the hub may occur during the installation operation. They are not recommended for applications that require precise axial positioning with this type of bushing. The SITLOCK® 6 bushing is recommended for torque applications to transmit media.
CAL7 execution Self-centering

Clamping bushing with unique cone design. Provides good concentricity and self-centering. It is recommended for medium torques. The flange design prevents axial movement during installation. It is suitable for applications with medium torques, which require very precise axial positioning.
CAL8 execution Self-centering

Clamping hub with unique cone design. The flanged design prevents axial movement during installation. The SIT-LOCK ® 8 has a very small comparative length, is self-centering, and has been designed to adapt to various shaft diameters, with the same external dimensions.
SIT-LOCK® 8 is recommended for applications with medium torques that require good axial positioning. The limited number of screws make installation quick.
CAL9 execution Not self-centering

It consists of two conical rings and a fixing nut. Its simple design allows for quick assembly/disassembly. SIT-LOCK® 9 is suitable for applications with medium and low torques.
CAL10 execution External

SIT-LOCK® 10 are clamp bushings with a double cone design. They offer very easy angular synchronization and axial adjustment of the shaft ends. They transmit high torque and offer a low-cost solution for rigid shaft-to-shaft connection.
CAL11 execution External

Clamping bushings designed for joining hollow shafts with
. By locking the Ballscrews, radial pressures act on the shaft, allowing for an efficient and solid connection
. Recommended for medium and high pairs. SIT-LOCK® 11 is also manufactured in “SPLIT” and “HALF” versions for special applications.
CAL12 execution Self-centering

3D Cal12 SIT-LOCK® 12 is a clamping bushing. Suitable for large quantities in medium torque applications.
CAL13 execution Self-centering

The SIT-LOCK® 13 bushing is similar to the standard type SITLOCK® 9 but with a longer design. It consists of two conical rings and a fixing nut.
CAL14 execution External

The clamping bushing of the 14 series consists of a single conical ring, unlike the type 11, which consists of three pieces. These bushings feature superior concentricity and self-centering, as well as a higher degree of dynamic balance. Suitable for applications with medium-high speeds.
They are manufactured in five different variants.
CAL15 execution Self-centering

Suitable for servo motors and small diameter pulleys. It generates a capacity of axial force similar to the resistance of the ball screws, and the axial movement it generates in the assembly can be used for axial locking of the bearings.
SIT Monolock Self-centering

Composed of a single cylindrical ring in which a tapered hole is cut. A special screw with a tapered surface is inserted into the tapered hole.
The screw is of quality 12.9 in order to allow the tightening torques indicated in the tables.
Benefits
• Quick and easy assembly and disassembly
• Quick installation and removal
• Economical
• Compact dimensions
Recommended for the connection of:
• Timing pulleys
• Sprockets
• Levers
• Cams
• Gears
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