When two pieces of wood are to be joined by dowels embedded in blind holes, there are numerous methods for aligning the holes.
12.
It may be necessary to periodically remove the tap from the hole to clear the chips, especially when a blind hole is threaded.
13.
A blind hole was bored at each end, to the depth of the neutral plane, and the calibration marks were made at this depth.
14.
The plug tap is used to cut threads into a blind hole _ a hole that doesn't go all the way through the piece.
15.
When dowels are glued into blind holes, a very common case in dowel-based Fluted with multiple parallel grooves along their length to serve the same purpose.
16.
Thus thread forming is particularly suited to tapping blind holes, which are tougher to tap with a cutting tap due to the chip build-up in the hole.
17.
Single-pass bore finishing is not well suited for blind holes because the tool has a tapered lead on it which prevents the bottom of the hole from being finished.
18.
"I played here in the Walker Cup ( in 1975 ) and thought there were about 15 blind holes-- and I wasn't all that keen on the other three,"
19.
The current density effects typically associated with electroplating are not a factor, therefore sharp edges, deep recesses and blind holes are readily plated to uniform thickness with electroless nickel chemistry.
20.
If threads are to be cut to the bottom of a blind hole, the taper tap will be followed by an intermediate ( plug ) tap and then a bottoming tap to finish the operation.
