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Gear Honing Machine Process Provides Finishes Comparable to Gear Grinding


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Now available from German Machine Tools of America (GMTA), the Präwema SynchroFine 205 HS gear honing machine features direct-driven, digitally controlled spindles for the tool and the workpiece, enabling precise, rigid synchronization. The Präwema gear honing process is said to produce finish quality comparable to grinding results for spur and helical gears as well as shafts. The machine’s software checks the stock allowance and workpiece runout and then optimizes the X-axis approach distance. Measuring the workpiece does not affect the cycle time, and the process can reduce cycle times by 3 to 5 sec., the company says.

The machine features a pick-up design to enable automation. The workpieces and dressing tools are loaded and unloaded by the workpiece spindle. The large X-axis travel enables placement of additional stations adjacent to the loading/unloading station inside the machine, such as a two-flank roll-checking device. External robots and conveyor systems can also be integrated.  

The honing machine is constructed on a natural granite bed to promote stability and control thermal fluctuations. The X and Z axes are equipped with linear motor drives. The cutting tool is clamped with a hydraulically operated system and the tool spindle can be swiveled into a vertical position, enabling easy access. Additional options are available for machining oversized drive shafts as long as 850 mm, and the HS-D model, equipped with two spindles, is available for further reduction of cycle times.

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