taylortools

Combined Tap & Drill
Suggestions for Use:
Set - up:
These tools require no special equipment or adapters. They fit standard tool
holders and may be used in multiple spindle, tapping operations equipped with
reversing mechanisms to withdraw the tap. In other cases (including CNC machine
centers), the combining of two operations greatly improve productivity
subsequently reducing costs.
As with any machining job, fixturing is extremely important and both the fixture
and work piece must be checked to ensure rigidity. These tools are designed to drill
and tap through holes up to two times the nominal diameter. The drill must
protrude through the material before tapping commences.
Speeds:
Materials:
Lubricants:
Surface Treatments:
These tools are designed to operate at speeds somewhere between the normal
drilling and tapping speeds for the given material. Start with the suggested tapping
speed, and then adjust the spindle R.P.M. upward or downward to find the
optimum speed for that particular application. On NC or CNC machines both a fast
drilling speed then a slower tapping speed can be programmed to maximize the
capabilities of these tools
These tools will work to advantage in any material where High Speed Steel tools will
perform. Successful applications have included aluminum, brass, bronze, cast iron
and zinc.
Any good cutting fluid or tapping lubricant is generally satisfactory. Proper
lubrication can greatly affect the tool life, cutting action, accuracy and thread
quality.
Special surface coatings may be added for improved performance, price upon
request
V 1.0 – November 2011 Page 66