Liukuputkien

Liukuputki is a Finnish term that translates to “sliding tube” or “revolving pipe” in English. It refers to a tubular component designed to permit controlled relative motion between connected parts while maintaining a sealed or lubricated interface. The core function of a liukuputki is to reduce friction, enable precise alignment, and allow for the transfer of forces or fluids along a defined path. In many industrial applications, liukuputket are employed as guiding elements in linear actuators, feed mechanisms, and hydraulic systems. The sliding action is typically facilitated by a metal or composite sleeve, which is often coated or lined with a low‑friction material such as PTFE, UHMWPE, or a specialized polymer alloy.

Manufacturers produce liukuputket in a range of diameters, wall thicknesses, and materials to accommodate different load requirements and environmental conditions. Stainless steel and aluminum alloys are common for high‑strength applications, while polymer and forged composite options are preferred for lighter loads or corrosive environments. Constructive features may include chamfered edges, internal ribbing, and surface treatments that reduce wear and extend service life.

Historically, the concept of a sliding tube dates back to early steam engines, where pistons required smooth motion against cylinder walls. Over time, advances in metallurgy and surface engineering have expanded the use of liukuputket into sectors such as robotics, aerospace, and medical instrumentation. The versatility of the design, combined with its low maintenance profile, makes liukuputket an essential component in many modern mechanical assemblies.