taper shank drill bit

angle of twist drill (1)

01/20/2016 langfeng carbide powder

►Twist drill mainly include rake angle and back angle, angle of the two had a great influence on drilling, angle before the bit edge to linger-sometimes constantly decreases, and then angle from the bit edge to linger-sometimes constantly [Read More]

How to mill good drill?(2)

01/18/2016 langfeng high speed twist drill

4.Drill cutting edge need to swing up and down, the tail can not warped. This is a standard drill grinding operation, the main cutting edge need to swing up and down on the wheel, that is to say [Read More]

How to mill hss twist drill?(1)

01/18/2016 langfeng high speed twist drill

Twist for machining, it is a commonly used drilling tool. Structure is simple, but it not an easy thing to have a really good sharpening. The key is to master the methods and techniques of well sharpening. The [Read More]

changing drill bit and ensure the second hole as same with the first

01/04/2016 langfeng high speed twist drill

►changing hss twist drill bit, how to ensure that a second drill hole as the same with first drill hole in depth Specific steps 1, grinding repair hss drill bit 2, h values measured by the projector cutting [Read More]

The inner cone grinding twist drill test analysis

10/08/2015 langfeng high speed twist drill

1 Conclusion: The principle of the right twist drill cone method grinding, grinding process method and parameters adjustment Reasonable and feasible plan, laid the foundation for a wide range of applications within the Twist Drill Sharpening Method. [Read More]

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