Maintenance Free Solution

“Lifetime” in this context means the bearing’s calculated life (e.g., L10 / L50), not an absolute time. Maintenance‑free solution is only guaranteed within that calculated life and given actual operating conditions: speed, load, temperature and working environment.

(A) Sealing design + lifetime grease

Contact seals or labyrinth seals prevent contaminant ingress and grease leakage. Bearings are filled with right selected, good‑quality or specially formulated grease for lifetime effect. The grease quantity is calculated  (generally 30%) to provide effective lubrication for the entire calculated bearing life (L10 or L50) under normal operating conditions.  MTWB offers patented sealing solution to international OEM customers.

(B)  Metal‑based solid lubricant embedded bearings

Solid lubricants (graphite, MoS₂) are inserted into a high‑strength metal matrix. During operation, small particles of the solid lubricant are transferred to the mating surface, forming a low‑friction film. These bearings have very high load capacity and excellent high‑temperature resistance. Used in heavy‑duty environments such as metallurgical and mining equipment.

(C)  Ceramic balls or bearings (silicon nitride, zirconia, etc.)

Ceramic materials are inherently self‑lubricating, extremely wear‑resistant, corrosion‑resistant, high‑temperature resistant, rigid, and electrically insulating. The main drawback is higher material cost. Typically used for special high‑speed applications requiring corrosion resistance, non‑magnetic operation, or electrical insulation.

(D)  High‑precision plastic bearings

Solid lubricants are usually applied for lifetime effect; they are lightweight, vibration‑damping, corrosion‑resistant, and cost‑effective, Suitable for low‑to-medium‑speed and low‑to-medium‑load applications such as packaging, food machinery, and agricultural equipment.

(E)  Oil‑free / self‑lubricating composite bearings 

A composite bearing has a composite layer acting as lubricant and runs dry.  It offers high load capacity, good high‑temperature performance, and a low, stable friction coefficient, commonly in automotive, hydraulic, and other medium‑to-heavy‑load applications where frequent re‑lubrication is difficult. DU‑type bearings has a three‑layer composite acting as lubricant: a metal backing for strength, a sintered porous bronze interlayer, and a PTFE‑based top layer.