Nov 25, 2021 The 45-degree double-headed saw cutting machine has the performance of synchronous sawing with two knives, which to a certain extent ensures the efficiency of the door and window processing and manufacturing process. ADS500x5000. CNC UPVC Window Double Head Cutting Saw. Features 1. Special designed for high volume PVC window profile cutting. 2. One time four or six pieces can be cut off, depending the profile width. 3. Auto change inside 45 and 90 degree.