Screw Machine Shops
Screw machine shops are industrial settings that offer specialized services that are geared towards producing and manipulating screws. These shops have the machinery needed to prepare the screws with: gauging, inspection, testing, heat treating, tool grinding machinery, drafting, and CAD systems.
A screw is basically an inclined plane that is wrapped around a shaft. Screws are one of the strongest types of fasteners used to join two things together. The thread of a screw is twisted in place into grooves on the surface it is joined to. When a screw has been fastened the thread will keep it from sliding out. Because screws are so popular in industry and all other walks of life, screw machine shops are very important.
There are different types of screw forming, machining processes and machine tools such as: turning, CNC turning, lead screw generation machines, flank grinding machines, helical tooth grinding machines, worm grinding machines, and knurling, etc. These are chip-forming machines and the shop setup will depend on the class and accuracy of the screws that are machined. Screw machine shops that produce lead and ball screws need to have very skilled manpower and accurate machines. Equally important is the helical and lead measuring instruments with good quality control personnel. Some shops have in-house heat treatment facilities that offer case hardening, stress relieving, annealing and other operations.
Other types of machines used in screw machine shops are thread-rolling machines and press machines for heading and slotting. Suitable demagnetizing machines, a hardness-testing unit, crack testing equipment and equipment to test the chemical composition, like spectrograph instruments are also needed, but these operations can also be outsourced.
Some screw machine shops also manufacture other small industrial items such as nuts and bolts, axles, bushings, connectors, cores, fasteners, fittings, gears, handles, knobs, inserts, pins, rivets, rollers, spacers, studs, and washers. Bolts are similar to screws as they are also shafts that have threads wrapped around them. However, the threads run the entire length of the shaft on screws, but only run on part of the shaft on bolts. A nut is a basically a grooved hole into which the bolt is threaded into and it secures the bolt in place, giving it a permanent bond.