Video on pattern allowance
https://youtu.be/ILvnLm3WnRA
Video on types of pattern
https://youtu.be/4iaAdmyO7y4
Video on blanking and piercing
https://youtu.be/ntLFDjsk530
Video credit at 3:38
Video of center less grinding that I taken.......in the video for explaination.
https://youtu.be/I_yY_-REPQY
channel name
https://www.youtube.com/user/h0trod389
this video is famous on that time when I make this video....
Thanks for watching
The music is taken from editing app FilmoraGo..... And content is taken from Google internet search
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https://plus.google.com/+Mechanical20hz
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https://twitter.com/20hzMechanical?s=09
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