here Sanwa JLX boasts technical improvements over the JLF:
 
LX-P-2 M base material changed to POM (polyacetal resin), enhancing durability and reducing sensitivity to environmental factors like temperature and humidity.
Thicker washer for M base to minimize rattling during operation.
Refined bearing fit inside the M base for reduced bearing rattling.
Bearing material shifted from POM to nylon for improved abrasion resistance and smoother sliding.
Micro printed circuit board material switched to CEM-3 for enhanced durability and reduced warping.
The JLX also features the JLF P-W Actuator from the JL-C line, which is 16.2mm wide, providing higher dimensional stability, reducing input accuracy variations.