Founded in 1995, Zidong Machinery Manufacture Co., Ltd. is a professional China screw machining manufacturer and designer in researching, developing and design all kinds of machines, equipment, lathe, machining, automatic and tools. ISO9001:2000 certified, we follow strict quality management criteria to provide high quality and cost efficient products. And We have gotten CE, GS and EMC approvals. We devote to carving CAD/CAM technology and CNC numerical control technology research OEM screw machinings and development. By adopting assembly technology and choosing fine materials, We have moved towards good stability and gets the position in advertisement, woodworking and metal mold industries.

Caldwell Manufacturing has 10 six spindle automatic screw machines capable of handling stock diameters up to 2 5/8 ". Typical product runs for the ACME Screw Machines are from 10,000 to 100,000 pieces. We have 15 single spindle automatic screw machines capable of handling stock diameters up to 1 5/8". Typical production runs for the Brown & Sharpe Screw Machines are from 100 to 10,000 pieces. In 1873 Christopher Miner Spencer developed an automatic lathe to manufacture screws in one operation. Today it is used for rapid and accurate production of countless varieties of duplicate parts from almost any material. The operations that can be performed on automatic screw machines are single-point turning, form turning, facing, chamfering, boring, drilling, reaming, shaving, tapping, threading, counterboring, countersinking, knurling, milling, trepanning, roller burnishing, broaching and cutoff.

Screw machining is about skilled people operating a complex machine to produce products to customer specifications. Since our beginning, we have had several expansions which were necessary because of customer demand for our products. The screw machine industry has changed considerably over the years. We have computerized control systems for manufacturing, for service and for quality. We process parts with environmental safety in mind. We have added machines, changed our systems, added skilled people; that’s what has enabled ALGER to grow and service our ever increasing customer base. Allow our experienced staff of engineers and executives to assist in design, testing and production of your machining requirements. High Quality Multi Axis CNC Turning, Milling & Drilling. The combination of the sliding headstock with guide bushing and cross tools makes it possible to obtain consistently excellent surface finishes.

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