Irwin Tools 3016128 Single Cobalt Alloy Steel High-Speed Steel Drill Bit
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About Irwin Tools 3016128 Single Cobalt Alloy Steel High-Speed Steel Drill Bit
Overall Feedback:
84% positive
85% appreciated its precise drilling accuracy, though 15% experienced deviation
While drilling light metal, I noticed that the bit was not accurate and danced all over the place.
Rephrased: The bit dances all over the place while drilling light metal and is not accurate.
I used cutting fluid and ensured the right drill speed, but the drill bits couldn't even drill Grade 5 bolts.
94% praised for its fast drilling speed, while 6% found it slow
I couldn't even drill Grade 5 bolts with the drill bits, even after using cutting fluid and ensuring the correct drill speed.
After drilling for 20 minutes with oil and resting the bit for 1 minute every 5, I found that the hole was less than 1/4 inch at the top surface and had not reached the bottom.
I tried drilling through a piece of 1/2 inch cutting edge steel with the drill bits, but they only made a small dimple.
92% liked its long-lasting durability, but 8% experienced frequent breakage
I couldn't even perform the primary function of drilling safety wire holes in the heads of Grade 8 bolts with the drill bits, even after using cutting fluid and ensuring the right drill speed.
I have found that this drill bit is not durable enough for use in a drill press with cutting oil and is not recommended for hand-held drills.
I drilled through 2 holes without any problem using the first bit, but after using 6 bits, I couldn't drill any more holes. This indicates that the durability of the bits is not up to the mark.
84% found it resistant to heat buildup, but 16% experienced thermal damage
I noticed that the bit would not cut and only generated heat as it tried to bore through the metal. This indicates that the bit is not heat resistant.
The bit is not heat resistant as it only generated heat while trying to bore through the metal.
I couldn't even drill Grade 5 bolts with the drill bits, even after using cutting fluid and ensuring the right drill speed.
80% praised for its versatility in drilling various materials, though 20% had difficulty with metal
I can enlarge the hole for cheaper and universal 11mm stem wheels with the bit.
This drill bit is not suitable for drilling into stainless steel.
I found that the drill bits were unable to drill through a piece of 1/2 inch cutting edge steel, indicating limited material versatility.
