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5pcs Counterbore Drill Bits Set, 4 Flutes Straight End Mill Cutter HSS Countersink Slot End Mill Cutter M3-M8 for Copper Aluminum Cast Iron

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$26.36

$ 10 .99 $10.99

In Stock

About this item

  • High speed steel -- The milling cutter is made of HSS-AL super-hard high-speed steel, hardness: HRC65~68°, rust-proof, and can be used for a long time.
  • High -- The cutting hole and the bottom hole of the tool have high alignment accuracy, reduce the time for changing tools, improve production efficiency and save making time.
  • Professional tools -- End milling cutter is a special production tool, mainly used to cut the head of this hole allowing bolts or screws.
  • Size -- Boot x Blade Diameter x Shank Diameter x Full Length: M3=3.2 x 5.9 x 6 x 45mm, M4=4.2 x 7.4 x 6 x 48mm ,M5=5.2 x 8.9 x 6 x 51mm, M6=6.2 x 10.4 x 8 x 58mm, M8=8.2 x 13.4 x 12 x 67mm.
  • Application -- It can be processed directly or finely processed to the heat treatment . Suitable for grinding copper, aluminum, steel, cast iron, etc., usually used for assembling on a milling machine.



Product Description

Solid Cap Screw Counterbore Set
Pilot Slotting Counterbore Mould End Mill Cutter
Solid Slot Countersink End Mill Drill Bit
Counterbore Drill Bits Set
4 Flutes Straight End Mill Cutter
HSS Countersink Slot End Mill Cutter

Jake Fischer
Reviewed in Canada on February 1, 2025
Not bad for the price. Sharp!!
Jack Roberts
Reviewed in the United States on March 29, 2024
Great product, decreases time spent on job and good price.
Customer
Reviewed in the United States on March 13, 2024
The seller shipped this very fast and even emailed me a few days later to make sure that I received the item and if I was satisfied with the product. I highly recommend this product and seller!
Thomas Piper
Reviewed in the United States on October 5, 2024
I was a tool and gage maker for most of my life, these tools are well made and fine quality.
Customer Review
Reviewed in the United States on April 22, 2024
These are a good set of counterbores for the money. I would only use them in softer materials and save the expensive carbide tooling for harder materials. But in aluminum, these do pretty well. I would use these in wood or plastic too. Not sure how well they would stand up to cast iron, but I wouldn't try it personally, they would probably last a job or two and be shot.For the price and how well they work on softer materials, go ahead and get some!
Holly Smith
Reviewed in the United States on July 13, 2023
Works great for SHCS counter bores. I can now quickly waterjet out plate (inc the right size pilot hole) then run these in the drill press and never fire up the CNC mill.
Kent Ashby
Reviewed in the United States on January 29, 2023
I won’t use these bits a lot but when you need to counter bore a hole in aluminum or wood they do the job without having to spend alot.
Jagrace10
Reviewed in the United States on January 12, 2023
As described, excellent product, worked perfect ! Great packaging.
John
Reviewed in the United States on December 24, 2022
I use these all the time making scales for pocket knives. I've only used them on plastic so these should last forever.
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