It can not be drilled with a center drill, another center drill is used to open the center hole, working with a hole saw can not be used once after use. We recommend you to purchase two pieces of returned goods, chip saws with useless items.
I use it for drilling for the switch of the control board. If you use it while using tapping spray it will be comfortable. Although it opened more than 10 pieces, it seems that it can be used still more.
It is used for a stainless steel plate with a thickness of 1.5 mm. After somehow opening one thing is not usable.
I am well acquainted with metal processing history of decades, how to use tools.
Is there unevenness in the product, is it such a thing?
Anyway it's kind of poor quality and I bought garbage.
I bought a hole saw of φ64. Sharpness was sometimes called the first time, and it finished without problems. In the opportunity to use for a while, time will be available but we will continue to record changes in sharpness.
Drilling machines such as electric construction pull boxes and boards on site Various
On 2017-09-07 06:48:20
I used a variety of maker items, but this is the best.
Sharpness and lifespan are satisfied. In addition,
For the stainless steel material, slow the rotation of the drill,
If you use it will not be changed to a dedicated holso.
21, 27, 34, are large.
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