K4® bushings are precision self-lubricating bushings made of a unique technopolymer, machined by CNC machines. 
The result of more than a decade of research and development, these bushings are distinguished by their rigorous specifications, both in production and controls, thanks to innovative and exclusive processes.
K4® is the brand name that identifies these bushings, which are manufactured and distributed globally.

K4® bushings are ideal for angular or linear movements in applications where materials such as bronze, aluminum bronze, bi-metallic or layered are traditionally used. 
They are particularly suitable for operating at high loads and low speeds, such as in joints for earthmoving equipment, attachments for anchoring and guiding the stems of hydraulic cylinders, axles, and many other applications. 
They also offer an optimal solution for situations where periodic lubrication needs to be reduced or eliminated.

The main characteristics of K4®bushings include oxidation resistance, electrical insulation, non-toxicity and self-extinguishing property. 
In addition, there are no dimensional constraints in their production, thus providing great design freedom. 
No special equipment is required for their assembly and maintenance.