Drill

Details Drill Drill

1997-02-12

1998-09-01

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408227, B23B 5102

Patent

active

058001018

ABSTRACT:
A drill capable of drilling a deep hole while keeping high chip discharging ability and having a helical flute whose width and helix angle will not change even after the cutting edges have been regenerated by regrinding. The drill has a tip portion formed with a helical flute having a constant width and helix angle, a rear portion formed with a helical flute which are greater in width and smaller in helix angle than the helical flute formed in the tip portion, and a middle portion provided between the tip portion and rear portion and formed with a helical flute smoothly connecting with the helical flutes of the tip portion and rear portion and having a gradually increasing width and a gradually decreasing helix angle from the tip portion toward the rear portion.

REFERENCES:
patent: 750537 (1904-01-01), Hanson
patent: 5312209 (1994-05-01), Lindblom
patent: 5350261 (1994-09-01), Takaya et al.
patent: 5704740 (1998-01-01), Ebenhoch et al.
Patent Abstracts of Japanese Patent No. 03142116, Jun. 17, 1991.
Patent Abstracts of Japanese Patent No. 62213911, Oct. 19, 1987.

Affiliated with

Also associated with

Rating

Drill does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-262411