Screw Machine Products

About Screw Machine Products and Screw Machine Product Manufacturers Including: Screw Machine Parts, Screw Machining, Swiss Screw Machine & Threaded Rod.

Screw machine products are turned parts created in high volumes on a screw machine. Basically, a screw machine, its cutting methods like a highly automated lathe, turns/faces the rod of material, parts it off and advances the rod for the next part. Bar stock is gripped by a spindle’s spring collet, which rotates the stock. The automatic movement, depth and duration of all cuts are controlled by cams. The turret automatically positions each tool. Lever-operated cross slides carry the tools at right angles to the spindle. The main drive shaft of a screw machine provides power to the machine bed’s lead work shaft and controls the two front cam shafts. The machine motor, located at the base of the machine, is the central power source for all operations and will vary in horsepower, depending on the size of the machine, speed and stock to be machined. Screw machines are equipped with a mechanical safety clutch that will disengage to stop the main drive shaft, in the event of overloading or jamming, in order to protect the operating mechanisms.

Automatic screw machines can be single- or multi-spindled. The Swiss screw machine, so named because it originated in Switzerland, feeds the bar stock through the cutting cycle. Another type of single-spindled machine rotates the work in a fixed position, which is typically heavier than that produced by Swiss screw machines. Multi-spindled screw machines can handle from four to twelve bars at a time. The stacked type is like four machines in one, as it can produce four complete pieces during one machining cycle. The spindles of an indexing type multi-spindled screw machine progressively cut the bar stock, making no identical cuts. The multiple-spindle chucking machine is similar to that of a multi-spindled automatic screw machine, except it is semi-automatic. Instead of bar stock, these machines are used for castings or forgings.

Screw machine product manufacturers provide integral components of a variety of products in the automotive, agricultural, medical, electronic and recreational industries. Screw machine products are used to form turned parts for numerous computer products, hardware and tools, lawn and garden equipment and an endless array of other industrial products. Turned parts include fittings, screws, bolts, pins, rivets, fasteners, studs and bushings. Cost effectiveness, rapid production and close tolerances for large volumes of parts are a few advantages of screw machine product manufacturers. In addition, a wide variety of metals can be turned, including stainless steel, brass, titanium and aluminum. Certain plastics can also be used in the production of screw machine parts.

When selecting screw machine product manufacturers, it is important to determine production needs. The type of material is a factor, as certain materials (e.g. steel) require more power than others, such as aluminum. The greater the desired spindle speed, the higher the horsepower required. Typically, a machine with maximum flexibility will cover all needs, depending on the range of work that is done in-house. However, if floor space is limited, attachments may be added to change a screw machine into a fully-automatic, multi-phase machine. These attachments help to economize space and to reduce the cost of per unit of output.

Screw Machine Products and Screw Machine Product Manufacturers Images Provided by H&R Screw Machine Products, Inc.

Types of Screw Machine Products

• Automatic screw machine parts are complex parts that are often cylindrical and/or threaded. Automatic screw machines produce these parts at high speeds.
  
• High precision screw machine products are produced to extremely close tolerances, which is particularly useful when producing large volumes of turned parts. Close tolerances are achieved through the use of high-grade metals and close inspections during production stages.
  
• Medical screw machine products are used in a variety of applications in the medical, scientific and pharmaceutical industries. Precision medical components include spinal implants, screws and dental implants.
  
• Screw machine parts are usually cylindrical and threaded products.
  
• Screw machine products are manufactured by screw machines.
  
• Screw machining is a manufacturing process that can turn out several identical products at the same time.
  
• Stainless steel screw machine parts provide superior corrosion and chemical resistance. Stainless steel screw machine products are useful in industrial applications in which they will be exposed to temperature extremes, moisture and chemicals.
  
• Swiss screw machine parts are produced to very close tolerances. Swiss screw machines are often used in the production of small, complex parts.
  
• Threaded rod is a fastening bar with a twisted grove along its length.
  
• Turned parts are parts with extremely tight tolerances that are formed by loading bar stock into a screw machine and then machining the parts as the bar is fed through the machine. The vast majority of turned parts are formed by this process.

Screw Machine Products Terms

Acorn Die – A threading die used in screw machines whose cutting portion has a shape similar to that of an acorn.

Broaching – A machining process in which the interior and exterior surfaces of a part are altered to meet design requirements by the pushing or pulling of a cutter, called a broach, through the part surfaces. Broaching is particularly advantageous when machining complex parts.

Button Die – A tiny, adjustable die that is supported in a ring holder. Button dies are used in screw machines and for other work of the same type.

Cams – The components of a screw machine that move the slides and turret in order to feed cutting tools to the work. Cams control the automatic movements, depth and duration of every cut.

Chuck – The part of the lathe of a screw machine that grips the part to be turned, holding it in place while it is rotated and shaped.

Collet – A type of chuck on a screw machine that provides a solid grip on the turned part. A collet holds the part in place during rotation without leaving any defective marks on the part.

Cross Slide – A cam-driven slide that carries tools at right angles to the spindle. Cross slides operate through levers to give each tool the proper feed.

Lathe – A screw machine tool onto which a part is placed and rotated in order to shape it.

Mechanical Safety Clutch – A device that protects the mechanisms of a screw machine by disengaging, in order to stop the main drive shaft in the event of overloading or jamming.

Milling – A machining process that involves the shaving of a layer from the metal part.

Precision Machine Screw – A slotted, machined screw that is milled from bar stock. The thread is then cut and the screw is machine-finished.

Screw Stock – Typically, a free-machining type of alloy, in the shape of a wire or rod, that is used to form screw machine products.

Spindle – A screw machine part that consists of a rotary shaft about which a screw machine part rotates.

Turning – A machining process, used to form screw machined parts, in which a blank is rotated about a stationary piece of equipment.

Turret – A component of a screw machine that is driven by cams to bring each tool into position automatically.