Coated Heads Show Zero Wear

The New Davenport coated head shows zero wear after producing one million parts in a test run on a customer's machines, the company says. Now, the same extended wear life found on the HP revolving head is available on standard 8-SA heads with standard spindles. Using a metallic hard-coating material on the bearing diameter bands, the 8-SA head has less friction and less wear.

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The New Davenport coated head shows zero wear after producing one million parts in a test run on a customer's machines, the company says. Now, the same extended wear life found on the HP revolving head is available on standard 8-SA heads with standard spindles.

Using a metallic hard-coating material on the bearing diameter bands, the 8-SA head has less friction and less wear. This is a way to extend the life and accuracy of the Davenport Model B and Servo B screw machines. After repeated testing, the hard-coated heads show no visible or measurable signs of wear, according to the company.

Both bearing diameter bands are designed to retain oil better and reduce friction during indexing by more than 65 percent. The heads reduce galling and pick up on the bearing bands because of dissimilar metal interfaces. Indexing the revolving head no longer runs a cast iron head on a cast iron bed. Its use causes no burning of high spots on the bores.