Publicidad
Idiomas disponibles
Idiomas disponibles
Tap and Die Set, 45-pcs
Instructions for use
Taps and dies are tools of high precision. They are produced from high-quality alloy steel, heat treated and tempered for a
hardness of 58-61 HRC. Check the hardness of your workpiece by a regular machinist´s file before starting thread-cutting. In
case the workpiece can be easily filed, you may proceed with your thread-cutting.
Please read and follow these instructions to reach a proper threading and longer tool-life.
Taps (for internal threads)
To cut an internal thread, select a proper drill-size as per the table shown below, the tap of the desired size, tap-wrench and
cutting-oil.
The proper hole-size is very important in the formation of good threads. An oversized hole results in reduced thread-height, an
undersized hole will overload the tap and will probably cause damage of the tool or even the workpiece. Please refer to the
table printed below concerning the correct size of drill. Fix the workpiece in a bench-vise or by using clamps.
Secure the tap by the square in the tap-wrench and start threading by turning the wrench in clockwise direction. Great care
must be taken to start the tap square to the hole. As the tap is turned it bites into the metal and leads into the hole. After the
tap has been started, the metal-chips that flow into the flute spaces must be broken to relieve pressure on the tap. This is
accomplished by reversing the tap-direction every 1/4 to 1/2 revolution depending on the tightness encountered. Providing
lubrication to the cutting edges while tapping will result in smoother threads and longer tap-life.
Continue threading until the tap passes through the workpiece or it reaches the bottom of the hole.
When tapping a blind hole (one that does not pass entirely through the workpiece) take care in drilling to provide clearance at
the bottom for metal-chips and the starter-threads. These chamfered threads on the end of the tap will not cut full threads.
Dies (for external threads)
To cut an external thread, such as on a bolt, select the correct die for the rod, being threaded, the die-stock and cutting-oil.
The size of the rod or bolt is of great importance. It must not be larger than the desired thread and preferably .005" to .010"
undersized. An oversized workpiece may damage the die and will make turning very difficult. Slightly undersized workpieces
are easier to thread and furnishes enough thread-height for normal use.
After securing the part being threaded, insert the die into the die-stock and run the set screw snugly into one of the recesses
in the outside surface of the die. (The recess and slot pattern of dies allows use with a variety of die stocks)
The chamfered side of the die is used for starting the threading operation. Always bevel the end of the bolt or rod to be
threaded, to make angles starting easier. This filed or ground chamfer also helps in starting at right to the work, which is of
major importance.
Start the die on the rod with clockwise rotation until it begins leading onto the workpiece. Metal-chips will flow into the holes
provided and should be broken by reversing the direction every 1/4 to 1/2 revolution, depending on the tightness encountered.
Continue this operation until threads of the desired length have been cut. Provide proper lubrication to the workpiece while
cutting threads.
DRILL-DIAMETER
METRIC
nominal size
M 6
M 8
M 10
M 12
M 14
M 16
M 18
M 20
M 22
M 24
check
hardness
pitch
drill-∅
1,00
5,0
1,25
6,8
1,50
8,5
1,75
10,2
2,00
12,0
2,00
14,0
2,50
15,5
2,50
17,5
2,50
19,5
3,00
21,0
select proper ∅
of the drill
METRIC-FINE
nominal size
M 6
M 8
M 10
M 12
M 14
M 16
M 18
M 20
M 22
M 24
observe correct
bevel the edges
cutting-angle
of rods or bolts
Item-no. 53245
pitch
drill-∅
0,75
5,2
1,00
7,0
1,25
8,8
1,50
10,5
1,50
12,5
1,50
14,5
1,50
16,5
1,50
18,5
1,50
20,5
1,50
22,5
start from proper
side with beveled
thread
Publicidad
