twist drill

Features of twist drill and its influence on cutting

03/10/2016 langfeng high speed twist drill

(1) The diameter of twist drill can be influenced by the aperture, spiral grooves make it be more detailed core drilling, drill rigidity is lower. There are only two edge band guidelines, hole’s axis are easily skew ; [Read More]

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]

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]

Twist drill sharpening techniques – high-speed steel cone shank twist drill grinding(2)

10/05/2015 langfeng high speed twist drill

Formula 3: ” behind by twist drill grinding blade consistency.” Here refers to the start bit parts along the entire blade slowly after grinding,For convenient grinding and heat dissipation. Three formulas: ” from the edge toward the back [Read More]

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