Taps thread bottom clearance

Description:To reduce thread drag I used a interupted thread tap to help out with the thread drag. EdDanzer Mechanical 26 Mar 09 Since sending more work out due to lack of time, I am getting some parts back that were poor due to tolerancing on the thread depths or perhaps different expectations for tolerances on thread depths. There are lobes periodically spaced around the tap that actually do the thread forming as the tap is advanced into a properly sized hole. With the splinters having been sanded off, the remaining parts were reassembled, encased in a makeshift mold of clay , and molten metal poured into the mold, so that an identical replacement could be made on the spot. For blind holes 3X the diameter is as short as is practical with spiral point taps.

Views: 4786 Date: 2018-12-06 Favorited: 78