Dake Corporation
1809 Industrial Park Dr
Grand Haven, MI 49417
977600-1V
11
REV012021
OPERATION
TAPPING OPERATIONS USING REVERSE FEATURE
1. Drill the initial hole on the drill press for accuracy of diameter.
2. Make sure the hole had a large enough chamfer. If the chamfer is too small the tap will
have to work a little harder when starting the tapping operation.
3. Select tap type. Choose from a taper tap (recommended), plug tap or bottoming tap. The
taper has several chamfer threads forming a tapered cone on the inserting end. The plug
tap has fewer chamfer threads and a bottoming tap only has a couple chamfer threads.
4. Match the tap size. Use the specified tap size to thread the hole diameter. Taps that are
sold with drill bits are size matched. The taps themselves may show the hole size they’re
intended for but is likely to be given in metric notation. Use a conversion chart to match
this with the standard fraction measured drill bits.
5. Cut the threads. Lubricate the tap with tapping fluid. Start the drill press and lower the tap
gently in to the hole to be threaded. It only takes a few seconds to tap. When the tap gets
to the desired depth reverse the direction of the spindle and the tap will work its way out,
as long as it has been set up properly.
Tips for tapping:
•
Tapping takes practice to do it well and not to break taps. If you’re new to tapping
practice on sample stock before tapping in to the actual material.
•
Materials have differing requirements for drill speed and lubrication.
•
Hole depths and diameters may present additional drilling requirements.
•
Refer to the material charts for drilling specifications.
DRILL/CHUCK INSTALLATION
1. Before inserting drill bits, chucks, or arbors always clean out the spindle hole and taper
hole with a clean cloth.
2. Open chuck jaws completely by turning attached chuck key counter-clockwise until the
jaws are fully opened.
3. To install the chuck to the arbor tightly, slide the chuck into the taper forcing it into the
spindle with by handle.
4. Place a block of wood on the table then lower the spindle to contact the wood and press
the chuck tightly into the spindle taper.
5. Install a taper shaft drill into the taper the same way as you would the chuck. If an
adaptor is used it must fit the taper correctly and the bit must fit snug in the adaptor.
