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5pcs of m35 cobalt steel drill bits with straight shank for efficient cutting of hard metals logo

5Pcs Of M35 Cobalt Steel Drill Bits With Straight Shank For Efficient Cutting Of Hard Metals Review

5

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Average

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$$
Revainrating 3.5 out of 5  
Rating 
3.4
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Details

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

Description of 5Pcs Of M35 Cobalt Steel Drill Bits With Straight Shank For Efficient Cutting Of Hard Metals

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 5
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Type of review

Revainrating 5 out of 5

Excellent drill bit

I bought this bit specically to drill the precise size hole for installing M6 rivetnuts. It did the job that it was purchased for.

Pros
  • 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.
Cons
  • Might be difficult to find replacement pieces for specific sizes

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
  • HSS Titanium Coating - Classic HSS Construction With Titanium Coating For Capability And Durability. The Cutting Edge Is Hardened And Honed For Sharpness.
Cons
  • Might not be necessary for casual or infrequent use

Revainrating 5 out of 5

Cut through SS like butter

I had to drill and tap a few anchor rings made of 304 stainless steel. My cheap wood bits would hardly touch it, but this bit went right through it with some cutting fluid.

Pros
  • The bit withstood some heavy drilling and did the job I bought it for, drilled some steel with it.
Cons
  • Only suitable for cutting hard metals such as stainless steel, titanium alloys, etc.

Revainrating 1 out of 5

Inaccurate best 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
  • Sin problemas Hasta Ahora
Cons
  • was warped and defective, threw it away. live and learn

Revainrating 5 out of 5

Not 1/2” shank on my review.

Just a warning that this bit will not fit your 1/2” drill. My mistake so I didn’t ding on the rating. I didn’t send back since it was my dumb mistake.

Pros
  • As advertised
Cons
  • Comparatively expensive than regular steel drill bits