Gear Production

APR 2016

Gear Production

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April 2016—13 wrenches and fasteners. Then, with installation of the new assembly, the process gets even slower, more tedious and more operator-intensive. All the components of the new assembly must of course be perfectly clean and properly lubricated. Even minimal dirt or residual swarf can ultimately cause unacceptable runout in the arbor. Improper lubrication can lead to fretting corrosion, and the potential for parts to seize up and/or fail catastrophically. Most importantly, the operator must be well-versed in the steps needed to ensure that standard workholding accuracies and repeatability are met—typically ±0.005 mm (0.0002 inch) total indicator reading. The arbor body, collet, expander and backing all must be checked and "trued" as they're assembled, using indicator gages. Precise torque specifcations must also be observed when tightening arbor body bolts and other fasteners. Repeat this process two or three times over the course of the average workday, and a manufacturer can lose an hour or two of precious spindle time, and hundreds, perhaps thousands of dollars in productivity each and every week. Manual to Modular New technology can take most of the variables— time, experience, accuracy—out of the change-over process. In recent years Gleason has developed modular workholding systems that reduce system complexity and, concurrently, most of the time and operator experience required for assembling traditional workholding systems. The best recent example is our The internal cam locking mechanism centers and secures the module. The installation is completed with a twist of the activation handle.

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