Thread Gauge: Multi Start

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Multi-start threads

Multi start threads are used where quick axial travel is desired with less rotation. These are also used for threads which cannot have coarse pitches due to metallurgical constraints. In comparison to single start threads, multi start threads  can accept higher axial thrusts for restricted angles of rotation, the efficiency is high, the tendency to locking is reduced. Multi start threads are commonly used in power transmitting screws, valve spindles.