Milwaukee 5/16 in. Thunderbolt Cobalt Twist Drill Bit
$10.68
Perform nailing and drilling works effortlessly with the selection of this reliable Milwaukee Thunderbolt Cobalt Drill Bit. Ensures extreme durability.
In stock
Description
The MILWAUKEE RED HELIX Cobalt 5/16 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 | 0.08 lbs |
|---|---|
| Dimensions | 1.88 × 0.38 × 6.75 in |
| Assembled Depth (in.) | 5/16 in |
| Assembled Height (in.) | 5/16 in |
| Assembled Width (in.) | 4.63 in |
| Bit Diameter | 5/16 in |
| Bit Length (in.) | 4.5 |
| 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 | 48-89-2317 |
| Self-Feeding | No |
| Shank Diameter | 3/8 in |
| Shank Style | 3-Flat |
| Tools Product Type | Power Tool |
Reviews (60)
60 reviews for Milwaukee 5/16 in. Thunderbolt Cobalt Twist Drill Bit
Only logged in customers who have purchased this product may leave a review.
Related products
Drill Bits
Model# 49-56-0247
Drill Bits
Model# FB-015
Drill Bits
Bosch 20 in. Hammer Steel 1-1/8 in. Hex Moil Point Chisel for General Chipping Work
Model# HS2161
Drill Bits
Bosch Carbide-Tipped Rotary SDS-Plus Hammer Bit Set (7-Piece)
Model# HCK001
Drill Bits
Milwaukee 1/4 in. X 3-1/2 in. Pilot Drill Bit For Hole Saw Arbor
Model# 49-56-8010
Drill Bits
Model# DW2162
Drill Bits
Model# 49-56-7010
Drill Bits
Model# 48-25-2252
Kailee Hammes (verified owner) –
Its an odd size but needed it for my application. Cobalt bit should last for a long time
Yvette Farrell (verified owner) –
the drill bit is a little expensive but it performs very well
Muriel Johns (verified owner) –
These are the best bits I have ever used. They last through many uses on heavy steel. (I recommend going slow, and putting a drop of oil on the tip every 30-60 seconds.) I used this bit to drill 10 holes thru 1/4” steel, then thru a bunch of rivets, and it is still sharp!
Clara Denesik (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.
Quincy McDermott (verified owner) –
I was trying to drill through metal none of the bits I had could drill through the harden steel a trip to home Depot and I bought this bit and it drilled through the metal like butter definitely recommend it
Chester Howell (verified owner) –
This drill bit stayed sharp to drill all the holes for the bolts that would attach new slats to my lawn furniture .Yea!
Victoria Gorczany (verified owner) –
Good drill bit. Exactly as expected.
Gayle Haag (verified owner) –
excelent and powerfull bit for use on steel
Lindsay Keebler (verified owner) –
They are the only bits I buy. They don’t clog up and stay sharp
Amos Klocko (verified owner) –
I would like to take back my negative review for 7/64 Milwaukee Cobalt bit . The hole I was trying to drill was at the angle and at a difficult location. The drill bit is excellent. I never seen a bit flex so much and not break.P.S. HD, fix the picture and a title for the review pop up. It does not match the link!
Harrison O’Conner (verified owner) –
I tried several bits to drill through hard steel. This one was, by far, the best and most durable bit that I used.
Lyda Feil (verified owner) –
Quickly and repeatedly went through the 1/8″ angle iron
Aliya Cummerata (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.
Ashleigh Bogan (verified owner) –
It served its purpose.
Euna Hickle (verified owner) –
is the most powerfull bit, for use on steel
Mervin Becker (verified owner) –
I have doors that are made from recycled wood. I tried to drill holes through the door with a cheap-o drill bit I had and it took over 10 minutes to get one hole drilled. I bought this drill bit, and it turned that time into 10 seconds per hole. I wish I had purchased this before making the first hole.
Alexzander Weber (verified owner) –
Great price and good bit!
Kennedi Rutherford (verified owner) –
I bought this to drill through a metal plate that I could not see inside a brick wall. It did not go through. I tried it on some scrape metal and it went through clean and fast so not sure why. The other issue was I bought a Milwaukee bit extender to reach through the wall and this bit would not in fit the 1/4 inch holder.
Birdie Thiel (verified owner) –
Strong drill bit. Works great on metal and last a long time.
Bert Blick (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.