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Drive mechanicals include everything necessary to spin the mill’s roll shafts. Examples include transmission shift boxes, gear reducers, universal drive shafts, and associated couplings. Also included in this category are gear reducer oil cooling systems and special disconnects for quick-changeability.
Modern mills today are typically direct driven without any belts or pulleys. The drive train is sized to match the requirements of the mill and not necessarily the size of the machine. For example, high-speed mills making small conduit may require a much larger gear train generally reserved for much larger mills.
As average mill speeds increase, the thermal limits of the gear reducer are often exceeded. To solve this problem, Rafter provides gearbox oil cooling systems designed for high reliability and ease of operation.
To allow for faster mill changeovers, Rafter can provide either quick-disconnect universal shaft coupling (see below) or more sophisticated “third-stand” automatic u-shaft disconnects.
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