Milwaukee 3/8 in. Thunderbolt Cobalt Twist Drill Bit
$15.40
Perform nailing and drilling works effortlessly with the help of this excellent Milwaukee Thunderbolt Cobalt Drill Bit. Ideal for any modern home.
In stock
Description
The MILWAUKEE RED HELIX Cobalt 3/8 in. Drill Bit are engineered for extreme durability and longer life in hard metal applications. The Milwaukee Cobalt drill bits are designed with a VARIABLE HELIX that includes an aggressive 35° Helix Angle which ends at 15°. The drill bits have QUADEDGE TIP to decrease heat buildup and drill faster. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes in Hard Metal, PVC and wood.The tapered drill bits feature a new ENHANCED TAPERED WEB that strengthens the bit’s core to increase flute durability. The cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs. Black Oxide Drill Bits.
- Cobalt alloy for up to 15x life vs. black oxide drill bits
- QUADEDGE TIP designed to decrease heat build up and drill faster
- ENHANCED TAPERED WEB strengthens the bits core
- VARIABLE HELIX Design for rapid material extraction
- 135° split point for precision start no walking
- 3-Flat Secure-Grip helps keep the bit fixed within the the chuck
- Designed for hard metals, PVC and wood
Additional information
| Weight | 0.1 lbs |
|---|---|
| Dimensions | 6.75 × 0.38 × 1.88 in |
| Assembled Depth (in.) | 3/8 in |
| Assembled Height (in.) | 3/8 in |
| Assembled Width (in.) | 5.12 in |
| Bit Diameter | 3/8 in |
| Bit Length (in.) | 5 |
| Bit Material | Cobalt |
| Drill Bit Type | Twist |
| Drill Bit Type(s) Included | Twist |
| Individual/Set | Individual |
| Material Application | Aluminum, Cast Iron, Duct/Sheet Metal, Stainless Steel, Steel |
| Model | 48-89-2321 |
| Self-Feeding | No |
| Shank Diameter | 3/8 in |
| Shank Style | 3-Flat |
| Tools Product Type | Power Tool |
Reviews (60)
60 reviews for Milwaukee 3/8 in. Thunderbolt Cobalt Twist Drill Bit
Only logged in customers who have purchased this product may leave a review.
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Noel Daniel (verified owner) –
They are the only bits I buy. They don’t clog up and stay sharp
Mariana Baumbach (verified owner) –
This bit worked fine for my steel drilling.
Dovie Koch (verified owner) –
Performed as specified by manufacturer.
Hortense Thiel (verified owner) –
It drilled perftly through the bolts I was trying to get off of my lawnmower. I would recommend trying it for yourself.
Janiya Dare (verified owner) –
It worked exactly the way I wanted
Elmira Feest (verified owner) –
the drill bit is a little expensive but it performs very well
Elliot Lowe (verified owner) –
Very good quality drill bit. I was able to drill through a quarter inch thick metal plate with relative ease.
Emery Nolan (verified owner) –
I am new to knife making. I have tried several different drills and this was the best of the lot for drilling hard metal. Drill speed is vital to successTool speed charts are available onlineI use 600 rpm on my drill press with a little motor oil
Alexandro Gaylord (verified owner) –
The best type of drill bit I use to work on stainless steel, the only bad point about them is that they are very fragile and break at the first mistake made during a manual drilling operation, but using correctly , they are the best!
Felix Leffler (verified owner) –
I have been drain drilling holes into galvanized steel planters and it has been doing fine. Very pleased. I bought two just in case but now I know I won’t need the other one.
Jayme Bode (verified owner) –
bit works great slow speed, we drill 15-20 sheets of steel roofing at a time 20 holes each sheet. lots of drilled feet by the end of the day. not the best bits in the world but will certainly work great if you know how to take care of them during use.
Tess Legros (verified owner) –
Drilled right though stainless like nothing
Rodrick Corwin (verified owner) –
I break bits pretty often when hand drilling and these bits are cheap enough that I am not upset when I do and sharp enough that I break them less often. Great for mild steel.
Ernest Senger (verified owner) –
Drilled 6 spot welds successfully while other drill bits broke or dulled quite quickly.
Macy Aufderhar (verified owner) –
Its an odd size but needed it for my application. Cobalt bit should last for a long time
Krystal Fay (verified owner) –
HD really wanted this review done; sent two requests. So, ok. I’ll write a review on a tiny, 1/16” drill bit. Here goes. I secured the drill bit in my drill, put the tip on the mark I’d made on my steel bathroom door, pulled on the power trigger and….drilled a hole. The tiny drill bit met my expectations. Well, there you go. Review done.
Joany Dach (verified owner) –
Throw this in a drill press and it cuts through steel like it’s aluminium. Does well with a cordless drill as well. Doesn’t wander much. So far has lasted way longer than a normal junk carbide or titanium coated bit. For metal drilling I’m going cobalt from now on, the price is worth it.
Noe Swift (verified owner) –
this drill bit did exactly what I needed it for. I especially liked the guiding nipple at the tip. I have had it for a month now and needed it to drill a large hole into a barbecue in order to insert a thermometer.
Dudley Russel (verified owner) –
Broke off an exhaust bolt and had to drill it out. (in place) Bought the 3/16 Cobalt as my starter size and also the appropriate size called for, to tap out the threads. I was surprised how easily these bits drilled through the old steal bolt.
Desiree Haley (verified owner) –
Working on a deck project that requires me to drill into aluminum posts. This drill bit appeared to be the best that Home Depot had to offer for a metal project.