Physical wood chip quality is essential for failure-free and low emission combustion in small-scale boilers ≤100 kW. In Bavaria, these furnaces are often operated by farmers or private forest owners that produce their own fuels using small to medium sized PTO-driven chippers. As secondary fuel processing steps such as industrial screening usually too expensive owners, the selection of suitable ...

This systematic review of the literature summarises the clinical experience with ceramic-on-ceramic hip bearings over the past 40 years and discusses the concerns that exist in relation to the bearing combination. Loosening, fracture, liner chipping on insertion, liner canting and dissociation, edge-loading and squeaking have all been reported, and the relationship between these issues and impl...

• Chipping, sledging and hammering on metal, stone or concrete • Use of manual, pneumatic and power impact tools • Caulking, brushing and grinding • Drilling, scaling and scraping soldering and casting hot metals • Handling acids, caustics and creosoted materials • Gas welding, cutting and brazing • Drilling overhead • In environments of excessive dust • Electric arc welding and cutting, and ot...

Abstract Blanking process of sheet metal is accomplished by a shearing action on thin plate placed between two sharp cutting edges, known as “punch” and “die”. The main problem this technology, that causes major shutdowns the press machine, punch wear. Among all blanking parameters, clearance set die has influence tool In context, our study focuses identifying optimum guarantees maximum abrasio...