Hobbing Machines 5

Hobbing machines for all areas of gear processing
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PRAWEMA WA400/2 Chamfering Machine
PRAWEMA SFSL 2-1 CNC Chamfering machine
PRAWEMA FA400/3 Hobbing Machine
PFAUTER SH 180 SHOBBER Gear hobbing machine - vertical
WANDERER GF 325 CNC Worm Milling Machine
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Hobbing is considered efficient because it is a continuous process, which with a small module allows complete gearing in just one operation. The hobbing machine can be used to produce many gear wheel shapes: external gears, helical gears, spur gears, bevel gears and pinion gears. Even internal gearings can be produced as long as the workpiece diameter, wheel width and max. wheel diameter are compatible. Hobbing machines are available in horizontal or vertical design, conventionally or CNC-controlled. Surplex offers used hobbing machines and other gear processing machinery. Here you can find even some recent models from WMW, MODUL, GLEASON, LIEBHERR, PFAUTER, etc.

Hobbing machines, also known as hobbers, are specialised machines used for the production of gears. Using the machine's various settings, the number of teeth, desired helix angle and profile correction can be set up. The hobber is made out of single or multiple-gear worms to build a worm gear unit with the workpiece. The rotary cutting motion occurs due to the turning of the milling tool. Additionally, the milling tool drives alongside the workpiece to generate the tooth space. The milling axis and turning of the workpiece can produce spur, as well as helical, gears.

  • Manufacture of gears of all types and forms
  • Products for various industries
  • High accuracy
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The versatility of a hobbing machine allows for the production of desired gears and splines with the highest levels of precision. As the process of removing metal can wear out the milling tool, this tool is continually shifted. This is how new teeth are produced. When the work tool is completely worn out, it is newly sharpened using a specialised milling machine.

Hobbing machines were conceived in 1856 by Christian Schiele. During this time, it was not possible to make this process automatic. In 1887, George Bernard Grant, an inventor that was mainly involved in the development of calculators, registered a patent for the first hobbing machine. This breakthrough was a universal hobbing machine by Hermann Pfauter, from Chemnitzer, the founder of PFAUTER.

Hobbing machine in use

Outer spur and helical gears, as well as inner gears, can be produced in a variety of sizes using a hobber. They are also used for the manufacturing of bevel gears, crown wheels, palloid and hypoid gearing, Gleason and Klingelnberg toothed gear tooth systems, screw augers and wheels. The products are mainly used in the automobile industry, agricultural technology, machine building industry and plant construction. The desired width of the teeth and helix angle is achievable through the simple adjustment of tools. Chippings are a result of the large amounts of cutting that occurs without a back stroke.

The process results in high levels of precision. For particularly demanding processes, workpieces are subsequently hardened, and ground or honed during the finishing process.

Several companies have specialised in the manufacturing of hobbing machines. Some of the most recommended suppliers include LORENZ, PFAUTER and KLINGELNBERG.