The SCL Series (Long-Type) is engineered to address the limitations of standard single-length slide blocks, specifically in applications involving cantilevered payloads and high-moment loads.
1. The "Long Stance" Structural Design
The defining characteristic of the SCL series is its elongated housing-typically double the length of standard SCS blocks. This design houses two sets of ball bushing circuits (or an extended recirculating track), effectively increasing the "bearing span." This wider geometric base significantly enhances resistance to Pitch and Yaw moments, allowing the carriage to remain stable even when the load is off-center.
2. Moment Load Resilience
In mechanical physics, moment load is defined as M=F×D. When a tool head or carriage plate hangs far off the rail axis, it exerts a twisting force on the bearing.
SCL Advantage: The extended footprint distributes these twisting forces over a larger contact area on the shaft. This prevents the "rocking" effect common in short blocks, ensuring the carriage remains perpendicular to the rail throughout the entire travel stroke.
3. Load Distribution and Fatigue Life
By doubling the number of load-bearing steel balls in contact with the rail, the SCL block drastically lowers the stress concentration per ball.
Fatigue Mitigation: Since ball bearing fatigue life is exponentially sensitive to load, halving the load-per-ball significantly extends the theoretical L10 service life compared to standard single-length slide blocks.
4. Industrial Protection (UU Sealing)
The SCL series functions as a fully enclosed, ready-to-mount module. Each unit features double-lip rubber wipers at both ends, creating a robust barrier against environmental contaminants. This makes the SCL series highly suitable for woodworking, light metal-working, and other environments where dust ingress is a primary concern.