Posted to News on 6th Mar 2026, 09:00
Heavy-duty rotary latch simplifies cab access while enhancing operator safety
Southco has introduced a new latch solution designed to tackle the problems of cab entry on off-highway equipment head-on: the R4-50 Rotary Latch with Dual Triggers.
For operators of off-highway and agricultural equipment, cab entry doors can be a daily frustration. Rough environments cause vibration, accidental door releases risk safety, and complex access mechanisms can slow down work in the field. Heavy-duty equipment demands a latch system that is just as rugged, reliable, and easy to use as the machinery it protects.
Engineered for demanding conditions, the R4-50 delivers:
Independent interior and exterior actuation - making it easier and safer to enter and exit equipment cabs
A pre-loaded interior hand lever - purpose-built for high-impact environments, reducing noise and vibration while ensuring smoother, more reliable operation.
Accidental actuation prevention - minimising unintended movement to keep operators secure and equipment protected.
Flexible release options - including remote actuator connection via cable or rod, or direct push release, to meet different cab design needs.
Southco's R4 Rotary Latch series is highly durable and is available in a variety of configurations that meet customer needs with little to no modification, including compact mechanical and electromechanical designs made of durable materials suitable for any environment. R4-50 Rotary Latches with Dual Triggers are capable of meeting FMVSS 206 impact standards, and EN 45545-3 fire protection standards.
As a heavy-duty upgrade to Southco's trusted R4 Rotary Latch line, the R4-50 with Dual Triggers combines operator safety, rugged durability, and simplified access in one cost-effective system. The latch is also compatible with Southco AC actuators, offering OEMs a low-investment, high-value option for enhancing their cab entry solutions.
Global Product Manager Cynthia Bart adds, "The new R4-50 Rotary Latch with Dual Triggers offers a complete, highly versatile cab door entry system for use in heavy-duty construction and agricultural vehicles. The latches are compatible with Southco AC Actuators, allowing designers to quickly and affordably upgrade their existing designs."
