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high-heat-resistant 14mm cobalt steel drill bit with straight shank for cutting stainless steel and cast iron - 1pc, grade m35 hss-co with 5% cobalt content logo

High-Heat-Resistant 14Mm Cobalt Steel Drill Bit With Straight Shank For Cutting Stainless Steel And Cast Iron - 1Pc, Grade M35 HSS-CO With 5% Cobalt Content Review

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Revainrating 3.5 out of 5  
Rating 
3.5
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Details

MaterialM35 Cobalt High Speed Steel
Finish TypeTitanium
Shank TypeStraight
Cutting Angle String135 Degrees
BrandLingGan

Description of High-Heat-Resistant 14Mm Cobalt Steel Drill Bit With Straight Shank For Cutting Stainless Steel And Cast Iron - 1Pc, Grade M35 HSS-CO With 5% Cobalt Content

Cobalt Steel - Manufactured From M35 5% Cobalt Steel, With Molybdenum And Cobalt Added To Creates A Hardened Alloy, Measuring Rockwell Hardness Up To 65, For Much Faster Cutting And Extra Longer Life Span, With Up To 10 Times When Compared with an Average HSS Drill Bit. HSS Titanium Coating - Classic HSS Construction With Titanium Coating For Capability And Durability. The Cutting Edge Is Hardened And Honed For Sharpness. Flutes Form - 2 Flutes Form Helps Clear Chips And Debris Away From The Bit, Decreasing Friction And Heat For A Faster, Cooler Drilling Process, Chatter-Free Design With Staggered Cutting Teeth Ensure The Precise Countersinking And Hole Smooth Clean. Straight Shank And 135° Point Angle - Straight Shank For Standard Drill Chucks And Collet Chuck To Hold Firmly, Assuring Accurate Centering; Helical Flute For Swarf To Easily Get Out; Ideal For General Purpose Drilling Applications. For Metalworking - Particularly Successful In Cutting Through Hard Metals(Hardness Less Than Hrc38°) Such As Stainless Steel And Cast Iron, Although They Can Be Used For Softer Materials Like Copper And Aluminium, Too. Not For Hardened Steel And High Carbon Steel.

Reviews

Global ratings 6
  • 5
    3
  • 4
    1
  • 3
    0
  • 2
    0
  • 1
    2

Type of review

Revainrating 1 out of 5

arrived dull, became dull after a few seconds again

I bought the drill to drill out a bolt stuck in a cylinder head.Drill arrived literally dull, not sharp as everybody would expect. Then I sharpened the drill and used it.Drilled less than 1/16 of an inch before it got dull again. No quality at all.

Pros
  • Cobalt Steel - Manufactured From M35 5% Cobalt Steel, With Molybdenum And Cobalt Added To Creates A Hardened Alloy, Measuring Rockwell Hardness Up To 65, For Much Faster Cutting And Extra Longer Life Span, With Up To 10 Times When Compared with an Average HSS Drill Bit.
Cons
  • The bit may be too loud or obnoxious during use, disrupting others in the vicinity or leading to complaints from neighbors

Revainrating 1 out of 5

Inaccurate in my review

The drill bit was not sharpened correctly from the factory and it drilled a hole way bigger than it should have. It should drill .492" dia and it drilled .509"!l

Pros
  • Looks like a quality product that will do the job for a long time.
Cons
  • Not 5mm, but 4.9mm. I can’t fit a 5mm rod in a 4.9mm hole.

Revainrating 5 out of 5

Sharp! Needed to move it to my Grizzly radial, too much bite for my table top drill to handle.

Like the very sharp cobalt edge. Using it to drill articulation holes for tracking solar array linear actuator mounts. No rating on longevity, that takes usage and the passage of time to determine.

Pros
  • As advertised
Cons
  • The 14mm size may not be suitable for all drilling needs, limiting its versatility

Revainrating 4 out of 5

8.3mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs

This was accurate in size, - needed it to be. Descent quality for the money. I looked close at how made, and no, not a premium bit, but very happy with the result I needed it for.

Pros
  • Straight Shank And 135° Point Angle - Straight Shank For Standard Drill Chucks And Collet Chuck To Hold Firmly, Assuring Accurate Centering; Helical Flute For Swarf To Easily Get Out; Ideal For General Purpose Drilling Applications.
Cons
  • The straight shank may not fit all types of drills, limiting compatibility with certain machinery

Revainrating 5 out of 5

Good Drill Bit BUT!

This a good drill and and fast delivery BUT! if all you have like most of us is 1/2" chuck drills this bit will not fit in the chuck. I was not going to buy a bigger drill so I ground a little off the drill shank. Works good now but may not be perfectly without a wiggle now

Pros
  • Twist Drill Bits
Cons
  • The M35 HSS-CO grade may not be suitable for all types of projects or materials

Revainrating 5 out of 5

It worked well as expected

I needed to drill some holes in a 3mm-thick steel plate. It was super easy and fast with this drilling bit. I used a metal screw to punch a small mark at the drilling position first before I started drilling.

Pros
  • For the price you can’t go wrong
Cons
  • The drill bit may be too expensive for some users, making it an impractical purchase