Switches fail for simple reasons: lubricant washes away, hardens under UV light, or loses mobility during cold starts.
The result is higher setting forces, more truck rolls, and avoidable incidents. In winter, the margin between a smooth throw and a cut‑out is the friction you do not control. A reliable way to reduce actuation torque and stretch re‑grease intervals is to pair the right plate lubricant with a disciplined test and inspection routine.
Adhesion and mobility, not either or
On switch plates, you want a film that stays where you put it yet remains mobile when movement begins. In Klüber’s switch test rig, which reproduces 10,000 strokes at 50 mm per second over 105 mm travel, with a normal force of 450 N and a cut‑out limit of 950 N, products from the Klüberrail family maintained low setting forces across temperatures from minus 35 to plus 80 degrees and after a 30-minute rain simulation. A competitor with low corrosion protection showed higher sliding forces due to rust after rain. UV exposure did not compromise the lubricant’s performance envelope.
What to specify and why it works
Select a biodegradable lubricant designed for switch plates that combines adhesion, water resistance, corrosion protection, and cold applicability. Klüberrail AL 32‑2000 and AL 32‑3000 are formulated for long relubrication intervals and small setting forces at low temperature, with AL 32‑2000 available as a spray for quick, consistent application. The family includes a higher-corrosion-protection option and a brush‑applied product for very long intervals. The portfolio is rapidly biodegradable according to OECD 301 and has been approved by a major European infrastructure manager based on laboratory and field testing.
For roller-supported switches and dispersed winter crews, the spray version matters. It enables uniform films without carry‑off, and teams can carry bottles to treat closures and plates during routine patrols. Sprayability down to minus 20 degrees is documented, with minus 15 degrees for the higher‑protection variant.
Where points use oleodynamic actuation, a low-temperature hydraulic oil keeps power packs responsive. ISOFLEX MT 30 ROT is approved by rail OEMs for such systems and operates from roughly minus 54 to above 90 degrees in unpressurised systems and to about 135 degrees in pressurised circuits, with a long in‑service interval in first equipment applications. This protects mobility when ambient temperatures fall.
Maintenance math you can defend
Base your re‑grease policy on force envelopes rather than fixed dates. Use the rig variables as your reference: measure setting force after application, after inactivity, and after rain exposure. Confirm that force remains well below your cut‑out threshold across cold and warm cycles. When forces stabilise through the cycle with a biodegradable plate lubricant, you extend intervals confidently and cut visits without accepting risk. The same approach explains failures avoided, because every avoided exceedance of the force limit is one less service interruption.
By matching adhesion with mobility and proving performance under rain, cold and UV, you lower actuation torque, extend re‑grease intervals, and reduce winter call‑outs while meeting environmental requirements. Then you lock in consistency through easy application methods that your crews can execute in all seasons.
