Roll-forged drill bit

Details Roll-forged drill bit Roll-forged drill bit

1996-07-25

2000-09-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

408225, 408230, B23B 5102

Patent

active

061133213

ABSTRACT:
A roll-forged drill bit 1 comprising a shank 3 for insertion in a chuck of a drill, the shank 3 including an helically twisted web 7 defining a cutting tip 9, the cutting tip 9 including a central chisel edge 11 and a cutting edge 15 defining the maximum diameter of the cutting tip 9, wherein the cutting tip 9 is formed after the shank 3 has been roll-forged and includes a pair of faces 13 defining the chisel edge 11 and a pair of upturned flats 17 defining the cutting edge 15. A roll-forged drill bit 1 according to the present invention provides a significant improvement in cutting speed over known prior art roll-forged drill bits.

REFERENCES:
patent: 1017352 (1912-02-01), Wagner
patent: 2332295 (1943-10-01), Bouchal
patent: 2600286 (1952-06-01), Weiland
patent: 2673714 (1954-03-01), Hargrave
patent: 3199381 (1965-08-01), Mackey, Sr.
patent: 3592555 (1971-07-01), Mackey, Sr.
patent: 3893353 (1975-07-01), Lahmeyer
patent: 4503920 (1985-03-01), Clement
patent: 4529341 (1985-07-01), Greene
patent: 4556347 (1985-12-01), Barish
patent: 4729441 (1988-03-01), Peetz et al.
patent: 4878788 (1989-11-01), Wakihira et al.
patent: 4924953 (1990-05-01), Moser
patent: 4968193 (1990-11-01), Chaconas et al.
patent: 4984944 (1991-01-01), Pennington, Jr. et al.
patent: 5011342 (1991-04-01), Hsu
patent: 5056967 (1991-10-01), Hageman
patent: 5181811 (1993-01-01), Hosoi
patent: 5423640 (1995-06-01), Lindblom et al.
patent: 5442979 (1995-08-01), Hsu
patent: 5570978 (1996-11-01), Rees et al.

Affiliated with

Also associated with

Rating

Roll-forged drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2205966