discount 70% in 2018-09-23 to 2018-09-25
price: USD$ 70.70
freight :USD$7.00,(Postal parcel)
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40 wire tap die set / auto maintenance special hardware tools
(genuine blade, with anti fake label)
False compensation three
40 sets of genuine Hangren taps and dies with anti-counterfeit labels
16 pieces of metric tap
M3*0.5, M4*0.7, M5*0.8, M6*0.75, M7*0.75, M8*1.0, M10*1.25, 12*1.5
M3*0.6, M4*0.75, M5*0.9, M6*1.0, M7*1.0, M8*1.25, M10*1.5, M12*1.75
16 - Metric yuan die
M3*0.5, M4*0.7, M5*0.8, M6*0.75, M7*0.75, M8*1.0, M10*1.25, M12*1.5,
M3*0.5, M4*0.75, M5*0.9, M6*1.0, M7*1.0, M8*1.25, M10*1.5, M12*1.75
1 pieces of --NPT tap: 1/8--27
1 --NPT: 1/8 - 27 yuan die
1 - tap holder 1/2 (M3-M12)
1 - diestock frame 1 (M25)
2 - T type tap holder 1/4
1 pieces of dental compasses
1 pieces of screwdriver
|Tap usage method:|
(1) when tapping, insert the nose to tap the center line and the center line of drilling.
(2) rotate the two hands evenly and add a little pressure to the tap to feed. No pressure is needed after the feed.
(3) each turn tap is rotated about 45 degrees at once to cut the chip so as not to block.
(4) if the tap is difficult to rotate, the rotation force can not be increased, otherwise the tap will break.
1, tapping the end of the hole should be chamfered; tap with the workpiece hole coaxial; tapping start should be applied to the axial pressure, so that tap into the cut, cut into a few laps after the axial force no longer need to be applied.
2, when the tap calibration part into the screw hole, each positive half turns to a circle to return 1/4, 1/2 ring, the chip broken down again after school; take the through hole, often exit tap chip.
In 3, the steel workpiece tapping on to cutting fluid tapping in cast iron workpiece, can add a little kerosene; with a taper, and then two attack and three attack, must be screwed in the screw tap.
4, the end of the workpiece should be chamfered, the end of the tooth should be perpendicular to the axis of the workpiece; when the thread starts, the axial pressure should be applied; the rotation pressure should be larger; when the screw thread is cut on the workpiece, no pressure should be added.
5, in order to make the chip broken, timely discharge, should often reverse the tooth.
6, the work should be firmly fixed in the clamp, a clamping device; when the tap is broken, a hand to touch off don't clamp, chisel or punching out, broken wires must wear protective glasses.
|Using the method of die:|
|With the wafer die when processing thread is half cutting half squeezing state. As the diameter of cutting part die diameter and die diameter, especially to bear large cutting force, it should have the strength and cutting ability. Taking into account the screw and the screw hole with the die cut out should have a certain gap, and taking into account the amount of wear, so die design, should make the diameter and diameter less than in diameter, the diameter of the thread in nominal size. D jmM0.8 =0.584 thread diameter D mm, diameter within the die plate. ., =0.55 mm, M0.8 diameter D =0.67 mm in diameter, die should be D in m.x=0.67 mm, 0.67 mm in 0.66 is generally determined. In actual production, because the diameter of die wear caused by scrap rarely, so in the design of the diameter of the wear volume can be considered small. But if the size is too small, then push the pressure screw will get increased, so die diameter should not be too small. The outer diameter of the thread is by cutting metal in die extrusion of plastic deformation and. In order not to block the metal workpiece broken, die diameter should not participate in the work, to leave a gap between it and cut. Such as cutting die M0.8 thread, minimum diameter is 0.8 mm and the average diameter to increase 0-02^0.03 mm.|
|Matters needing attention：|
|In the first 45 degree chamfer machining end bolt blank, to prevent the generation of die suddenly in the guide blade loading phenomenon. At the same time to ensure that the circular tooth or six angle die cut blank vertical bolt.|
Reduce the diameter of the bolt blank as much as possible, that is to ensure that the tolerance related to the bolt diameter is close to the lower limit, so that the cutting force can be reduced to the minimum when tapping.
With a cutting edge inclination portion of the die, which can ensure that the chip export machining area.
The correct coolant is used and the adequate coolant is aligned to the cutting zone.
In the regulation of open die, not to die open, open die of workpiece scratching rather than cutting in when tapping. Uniform rotation adjustment screw, the die opening closed about 0.15mm. If the pressure in the die is only one side of the die may cause damage.