DE1965131B2 - Tungsten carbide tipped drill bit wear indicator - comprises recess in land enclosing first turn of chip groove - Google Patents

Tungsten carbide tipped drill bit wear indicator - comprises recess in land enclosing first turn of chip groove

Info

Publication number
DE1965131B2
DE1965131B2 DE1965131A DE1965131A DE1965131B2 DE 1965131 B2 DE1965131 B2 DE 1965131B2 DE 1965131 A DE1965131 A DE 1965131A DE 1965131 A DE1965131 A DE 1965131A DE 1965131 B2 DE1965131 B2 DE 1965131B2
Authority
DE
Germany
Prior art keywords
recess
turn
tungsten carbide
drill bit
chip groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE1965131A
Other languages
German (de)
Other versions
DE1965131A1 (en
DE1965131C3 (en
Inventor
Horst 7000 Stuttgart Sigg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19691965131 priority Critical patent/DE1965131C3/de
Publication of DE1965131A1 publication Critical patent/DE1965131A1/en
Publication of DE1965131B2 publication Critical patent/DE1965131B2/en
Application granted granted Critical
Publication of DE1965131C3 publication Critical patent/DE1965131C3/de
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/44Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2260/00Details of constructional elements
    • B23B2260/144Wear indicators

Abstract

The wear indicator is for a drill bit with tungsten carbide tip. At the first turn of the chip groove (5) behind the tip (2) a recess is formed in one or more of the lands (6) enclosing the groove, showing when it is time to change the bit. The recess can be a groove (7), running either in the axial or transverse directions. The indicator is for a bit used in a drilling hammer for drilling masonry where wear results in inadequate guidance of the bit and consequent poor quality of the hole drilled.
DE19691965131 1969-12-27 1969-12-27 Expired DE1965131C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691965131 DE1965131C3 (en) 1969-12-27 1969-12-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691965131 DE1965131C3 (en) 1969-12-27 1969-12-27

Publications (3)

Publication Number Publication Date
DE1965131A1 DE1965131A1 (en) 1971-07-15
DE1965131B2 true DE1965131B2 (en) 1979-11-08
DE1965131C3 DE1965131C3 (en) 1980-07-24

Family

ID=5755124

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691965131 Expired DE1965131C3 (en) 1969-12-27 1969-12-27

Country Status (1)

Country Link
DE (1) DE1965131C3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167833B1 (en) 1998-10-30 2001-01-02 Camco International Inc. Wear indicator for rotary drilling tools
DE19859624B4 (en) * 1998-12-23 2007-07-26 Robert Bosch Gmbh Device for marking tools
DE10159014A1 (en) * 2001-11-30 2003-06-18 Hilti Ag Rock drill
DE20216056U1 (en) * 2002-10-18 2004-03-04 Pallmann Maschinenfabrik Gmbh & Co Kg Device for comminuting feed material
DE102010045388A1 (en) * 2010-09-15 2012-03-15 Irwin Industrial Tools Gmbh Carbide head for a tool for processing solid material

Also Published As

Publication number Publication date
DE1965131C3 (en) 1980-07-24
DE1965131A1 (en) 1971-07-15

Similar Documents

Publication Publication Date Title
GB1276249A (en) Improvements in or relating to percussion drill bits
GB1461005A (en) Core bit for producing a core while drilling a bore hole
GB1518950A (en) Drilling device
GB1432546A (en) Twist drills
DE1965131B2 (en) Tungsten carbide tipped drill bit wear indicator - comprises recess in land enclosing first turn of chip groove
GB1394115A (en) Rotary earth drilling tools
GB963670A (en) Improvements in or relating to deep drills
GB1430603A (en) Bit for drilling wells in the earth
GB1261776A (en) A drill bit adapter for a hammer drill
GB1008029A (en) Drill bits
GB1265071A (en)
GB1146403A (en) Improvements in drill bits
GB1097549A (en) Percussion bit and chuck assembly and a percussion bit for incorporation in such an assembly
GB1218075A (en) Drilling tool
GB1019027A (en) Improvements in or relating to drill bits for rotary percussion drilling
GB822029A (en) Improvements in or relating to scroll-type drilling tools
GB636768A (en) Improvements relating to drilling appliances
DE2410547A1 (en) Wood screw drill bit - has a narrow tip and conical shouldered upper part
US2767958A (en) Rock drill bit
DE2402516A1 (en) Hole depth drilling limitation method - has drill with clamping socket with stop collar and clamping ring
DE2938715A1 (en) Metal drill for deep holes - has hollow shank carrying drill bit, with spiral flutes and chip breaker groove
DE2506611A1 (en) Pilot hole precision drill - shaft head cased and fitted with spiral and chisel bit
GB1191934A (en) Improvements relating to Drills and Plugs to be used therewith
GB897516A (en) Drill bits for earth formations
GB788104A (en) Improvements in or relating to rock drilling bits

Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee