Drill America Q Cobalt Heavy Duty Split Point Stub Drill Bit - Pack

In this review of the Drill America Q Cobalt Heavy Duty Split Point Stub Drill Bit pack, the bottom line is simple: these are built for anyone who needs short, rugged drills that cut through high tensile materials without frequent replacement. The reviewer finds the 135 degree split point and cobalt construction make these bits especially effective on stainless steels, nickel alloys, and other tough metals, while the stub length reduces breakage and wobble during portable or machine drilling. Overall, the set is aimed at tradespeople and hobbyists who need dependable, longlasting twist drills rather than casual home users.

Key Features

• Cobalt steel construction: higher cobalt content improves performance when cutting hard metals like stainless steel and nickel alloys, reducing wear compared with standard high speed steel bits.
• 135 degree split point: the selfcentering tip lowers thrust and improves hole accuracy, so starts are cleaner and require less pilot work.
• Stub length design: short, rugged construction resists breakage and offers better control for portable and machine drilling in demanding materials.
• Round shanks: compatible with a wide variety of toolholding systems, making these bits easy to use in different drills and chucks.
• Spiral flutes (righthand cut): evacuate chips up and out of the cut when run normally, which helps reduce clogging during longer holes in tough alloys.
• Gold oxide finish: a thin oxide surface treatment that mirrors the feel of uncoated tools while providing a consistent identifying surface for cobalt steel.

Who It's For

These bits are best for professional mechanics, fabricators, and machinists who regularly drill high tensile strength materials such as PH stainless, inconel, and titanium. The combination of cobalt steel and a split point tip gives reliable starts and longer life in challenging materials where standard HSS bits would struggle.

Hobbyists who occasionally drill mild steel or wood might find this pack overspec'd and more costly than general purpose bits; likewise, those needing extra long reach or specialized coatings for extreme wear conditions should look elsewhere.

Pros & Cons

Pros

• Durable cobalt construction that customers report shows minimal wear after repeated uses.
• Split point tip selfcenters to reduce walking and lower required thrust.
• Stub length reduces breakage risk and provides stable drilling in portable or machine setups.
• Good value for the performance, with customers noting quality and sharpness at an attractive price.

Cons

• Gold oxide is a thin surface treatment and does not provide the extended wear of tougher coatings, so users needing extra coating protection may prefer other finishes.
• Short stub length limits reach for deep hole drilling; not suitable when long bit length is required.

Specifications

Our Verdict

The Drill America Q Cobalt stub drill pack is a solid choice for professionals and serious hobbyists who need dependable bits for tough alloys; the cobalt build and split point deliver better life and cleaner starts, and the stub form reduces breakage. For those who need long reach or specialized coatings, other options may be more suitable, but for value and durability in high tensile materials this pack represents sensible performance.

Frequently Asked Questions

Are these bits suitable for stainless steel?
Yes. The cobalt steel construction and split point are specifically tuned to perform well in stainless steel and other high tensile alloys.

Can these be used in a portable drill?
Yes. The stub length and round shank make them well suited for portable drilling as well as machine use.

Does the gold oxide finish provide long lasting wear protection?
The gold oxide is a thin surface treatment that identifies the cobalt steel and performs similarly to uncoated bits; it is not a heavy wearresistant coating.