Thanks for visiting Woodturning Tools. Please remember to bookmark this page Cobalt Jobber Drills. If you found what your looking for, then don"t forget to click an appreciation button above for this post.
 ACCUPRO 2.48mm Cobalt Parabolic Jobber Drills Box of 5 Drills C7 US $15.99 
|
 17 GREENFIELD 3/16, 13/64, 15/64 HSCo Cobalt 135* Jobber Length Twist Drill Bits US $39.70
|
 9 new GREENFIELD 1/4" / E HSCo Cobalt 135* Jobber Length Twist Drill Bits 311505 US $26.18
|
 8 - GREENFIELD 9/32" HSCo Cobalt 135* Gold Jobber Length Twist Drill Bits 311507 US $27.99
|
 10 NEW NACHI #74 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $7.50
|
 3 - NEW NACHI #36 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $6.75
|
 NEW NACHI #35 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $3.00
|
 2 - NEW NACHI #32 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $5.00
|
 3 - NEW NACHI #24 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $6.75
|
 2 - NEW NACHI #23 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $4.50
|
 NEW NACHI #20 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $4.00
|
 9 - NEW NACHI #16 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $23.07
|
 2 - NEW NACHI 23/64" LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $16.35
|
 5 - NEW NACHI 23/64" LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $40.70
|
 5 - NEW NACHI #4 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $18.45
|
 NEW NACHI #13 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $4.50
|
 NEW NACHI #18 LIST 6501 TWIST DRILL BIT HSS COBALT OXIDE JOBBER LENGTH US $5.00
|
 #11 COBALT JOBBER LGTH DRILL W/ 135DG SP PT , BRONZE (J-1-11-3-K-FR34) US $5.87
|
 NEW Lot of 12 Cobalt Split Point Jobber Drill Drills 0.2570" US $25.00
|
 # 48 Cobalt Jobber Drills, Package of 12, .076" x 1" x 2" US $4.99
|
 3/64 Fast Spiral Jobber Length Parabolic Cobalt TiAlN Coated Drill NEW Accupro B US $2.95
|
 60 Pc Drill America No.1 to 60 M42-8% Cobalt Jobber Drill Set w/Huot Index US $100.00
|
 DRILL BITS COBALT, PAN AMERICAN JOBBER DRILLS NAS907J .1935 2-7/16 US $40.00
|
 Hertel Jobber Drill Bit Set 1/16" to 1/2" x 1/32nds Cobalt HSS 15 pc USA {AL2} US $89.00
|
 12 new GREENFIELD 25/64" Jobber Length HSCo Cobalt Twist Drill Bits GOLD 311514 US $48.24
|
 31 new GREENFIELD 7/32" HSCo Cobalt Jobber Length Twist Drill Bits 135 SP 311503 US $52.08
|
 12 new GREENFIELD #6 Jobber Length HSCo Cobalt Twist Drill Bits D296676 US $20.55
|
 24 new GREENFIELD #11 Jobber Length HSCo Cobalt Twist Drill Bits 296681 US $34.84
|
 10pc YG1 1/4 M42 Cobalt Jobber Drill Gold-P US $27.00
|
 5pc YG1 1/2 M35 Cobalt Jobber Parabolic Gold-P Drill US $59.50
|
 10pc YG1 #11 M42 Cobalt Jobber Drill Gold-P US $19.60
|
 Precision 0.315" x 2-15/16" x 4-19/32" RH SP Cobalt TiAlN Jobber Drills US $33.10
|
 Precision Twist Cobalt .1910 D(#11) 1.1875 Flute Length Jobber HD Drill Bit US $13.92
|
 Precision Twist Cobalt .1910 D #11 2.3125 Flute Length Jobber Bronze Drill Bit US $11.53
|
 Precision Twist Cobalt .1935 Diam. #10 Jobber Length Drill Bit US $18.89
|
 Precision Twist Cobalt .2040 D(#6) Jobber Drill Bit US $2.52
|
 Precision Twist Cobalt .2656 D 17/64 Jobber Length Bronze Drill Bit 10/Pack US $28.46
|
 Precision Twist Cobalt .3680 D ( U )Jobber Length Drill Bits 3/Pack US $23.10
|
 Precision Twist Cobalt .4062 13/32 Jobber Standard 135° Split Point Drill Bit US $9.11
|
 6 new GREENFIELD 23/64" Jobber Length JL Cobalt Twist Drill Bits 311512 USA US $26.24
|
 5pc 12.5mm COBALT 130° Jobber TN Parabolic Drills YG1 EDP #DLGP506125 US $85.25
|
 5pc 10.4mm COBALT 130° Jobber TIN Parabolic Drills YG1 Part #DLGP506104 US $61.40
|
 10pc #33 COBALT DLGP 130° Jobber TN Parabolic Drills Parabolic Flute US $15.80
|
 5pc 9.6mm COBALT 130° Part #DLGP506096 Jobber TN Parabolic Drills YG1 US $53.75
|
 5pc 10.50mm COBALT 130° Jobber TiN Parabolic Drills YG1 EDP #DLGP506105 US $61.40
|
 Pack of 5pcs 9.90mm COBALT 130° Jobber TN Parabolic Drills YG1 EDP #DLGP506099 US $53.75
|
 5pc 12.40mm Parabolic Drills COBALT 130° Jobber TN YG1 EDP #DLGP506124 US $85.25
|
 35 new GREENFIELD #27 Jobber Length HSCo Cobalt Twist Drill Bits D296697 US $32.55
|
 21 new GREENFIELD #19 Jobber Length HSCo Cobalt Twist Drill Bits D296689 US $23.66
|
 1 Lb Cobalt Drill Bits USA Made Jobber Length 78 Pcs US $10.50
|
 1 Lb Cobalt Drill Bits USA Made Jobber Length 74 US $.99
|
 1 Lb Cobalt Drill Bits USA Made 6" And Jobber Length US $.99
|
 NEW #25 (.1495) TIALN COATED HERTEL COBALT JOBBER DRILL US $1.99
|
 NEW #26 (.147) TIALN COATED HERTEL COBALT JOBBER DRILL US $1.99
|
 NEW 3/16 (.1875) TIALN COATED HERTEL COBALT JOBBER DRILL US $1.99
|
 NEW #15 (.180) TIALN COATED HERTEL COBALT JOBBER DRILL US $1.99
|
 NEW 2mm (.0787) TIALN COATED HERTEL COBALT JOBBER DRILL US $3.99
|
 NEW 12.50 mm (.4921) TIALN COATED HERTEL COBALT JOBBER DRILL US $7.99
|
 HERTEL 21/32" Cobalt Split Pt Jobber Length Drill i7 US $37.95
|
 HERTEL 35/64" Cobalt Split Pt Jobber Length Drill i7 US $24.95
|
 TITEX PLUS 29/64" A1249 TiN Coated Cobalt Jobber Drill US $16.49
|
 10.80mm COBALT DLGP Jobber TN Parabolic Drills 130° YG1 DLGP506108 5pc US $61.40
|
 10pc #38 COBALT DLGP 130Deg Jobber TN Parabolic Drills US $15.80
|
 10pc #37 .104" COBALT 130° Jobber TiN Parabolic Drills DLPG512211 US $15.80
|
 1 Lb Cobalt Drill Bits USA Made Jobber Length 84 Pcs US $.99
|
 1 Lb Cobalt Drill Bits USA Made Jobber Length 82 Pcs US $.99
|
 1 Lb Cobalt Drill Bits USA Made Jobber Length 81 Pcs US $.99
|
 12 PRECISION TWIST DRILLS #13 jobber length cobalt PTD US $14.99
|
 10pc 2mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506020 US $16.30
|
 10pc 2.1mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506021 US $17.30
|
 10pc 2.2mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506022 US $17.30
|
 10pc 2.3mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506023 US $17.30
|
 10pc 2.4mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506024 US $17.30
|
 10pc 2.6mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506026 US $19.50
|
 10pc 2.7mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506027 US $19.50
|
 10pc 2.8mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506028 US $19.50
|
 10pc 2.9mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506029 US $19.50
|
 10pc 3.0mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506030 US $19.50
|
 10pc 3.1mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506031 US $22.30
|
 10pc 3.2mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506032 US $22.30
|
 10pc 3.3mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506033 US $22.30
|
 10pc 3.4mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506034 US $22.30
|
 10pc 3.5mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506035 US $22.30
|
 10pc 3.6mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506036 US $25.80
|
 10pc 3.7mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506037 US $25.80
|
 10pc 3.9mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506039 US $25.80
|
 10pc 4.0mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506040 US $25.80
|
 10pc 4.1mm COBALT DLGP 130 Degree Jobber TN Parabolic Drills YG1 EDP #DLGP506041 US $30.50
|
Cobalt Jobber Drills
Cobalt Drill Bits - Possibly The Toughest Drill Part
As you probably already realize, there are many different drill bits each with a specific usage. Strength is a big part of design differences, as drills are made specific to the hardness of material to be drilled through. The vast majority of drill bits are cast with spiral grooves. Bits can also be coated with specialized materials such as carbon or ceramics. But which are the very hardest drill bits? Cobalt drill bits are so tough that they can drill through metals, making holes that's a rifle bullets couldn't. In fact cobalt drill bits can be used to manufacture rifle parts.
Cobalt drill bits are made from a steel alloy, and are a little different from standard high speed drill bits in that they contain more cobalt, hence the name - head to HSS drill bits for additional material relevant to this theme. They are designed to hold their sharpness even at high temperatures. Your average drill bits, when pushed through metallic sheets, quickly become blunted. They can literally start to melt due to the friction. The superior strength of these drill bits does have a counterbalancing weakness: they are more brittle or breakable. However there are ways of working around this. Even with these bits it's a good idea to use lubricating fluid to reduce temperature build up - stop by electrical courses for lots more material on this subject.
The advantage of being able to drill through heavy metals is obvious, but be aware that not all cobalt drill bits are alike. The percentage of cobalt is different in specific varieties of these bits. The lower percentage cobalt bits have greater heat resistance than the higher percentage ones, but the higher percentage bits have longer life.
Although cobalt produces a steel alloy that is much harder than the norm one great feature is that it does not change the magnetism. That means that if you drop your bit you can find it with a magnet as you would other bits. To give you an idea of the durability and usefulness of the alloyed metal, it is also used in jet engines and prosthetic hip replacements. The cobalt in the steel alloy sets these bits apart from their high-speed steel brethren.
The creation of cobalt alloys makes it possible to drill through hardened metal, titanium, and cast iron. They can withstand heats up to 1,100 degrees and keep working where a lesser bit would soften and dull. In addition these bits are often cast in a layered framework to further enhance strength and decrease the chance of breakage.
If you are looking for a different item here are a list of related products on Woodturning Tools, please check out the following:
