Based on the product information, it does not mention anything about requiring lubrication for smooth bending. However, the mechanical ratchet mechanism ensures smooth, accurate bending with minimal effort.
The product description does not specify if it can bend pipes thicker than the specified range. However, it states the wall thickness of pipes it can bend range from 0.5-1.2 mm.
Based on the product information, it mentions that the bender is easy to maintain with replaceable components like bending wheels and fixing support blocks. However, it does not explicitly state if replacement parts are readily available.