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⚡ Drill Like a Pro: Cut Hard Metals with Laser Precision and Unrivaled Endurance!
This 8.5mm M35 cobalt steel twist drill bit features a hardened alloy with 5% cobalt and titanium coating, delivering exceptional heat resistance and durability. Its 135° point angle and 2-flute design optimize chip removal and precision drilling, making it ideal for cutting through tough metals like stainless steel and cast iron with up to 10 times longer lifespan than standard HSS bits.
| Asin | B08NYSZ571 |
| Best Sellers Rank | #1,979 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #2 in Metalworking & Multipurpose Drill Sets |
| Brand Name | LingGan |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,458) 4.4 out of 5 stars |
| Cutting Angle String | 135 degrees |
| Cutting Diameter | 8.5 millimeters |
| Finish Types | Titanium |
| Item Dimensions | 4.61 x 0.33 x 0.33 inches |
| Item Weight | 0.04 kg |
| Manufacturer | LingGan |
| Material Type | M35 Cobalt High Speed Steel |
| Minimum Bore Diameter | 8.5 millimeters |
| Model | 2020-11-21-15-75 |
| Number Of Flutes | 2 |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Part Number | 2020-11-21-15-75 |
| Point Style | Taper Point |
| Set Name | No Set |
| Shank Type | Straight |
| Surface Recommendation | Stainless Steel,Cast Iron,Steel,Metals |
| Tool Flute Type | Spiral |
| Unit Count | 1 Count |
User
Decent quality steel drill bit
Needed to make a tight 10mm hole in a collar I was machining out of aluminum. This bit worked pretty well. I only used it for the final cut though, so just removing a few thousandths of material. Worked out well though and no damage to the cutting edge or flutes. My hole diameter came out to within .002 inches of 10mm. If you need a metric drill bit for a tight hole, this would work.
User
Excellent for stainless steel
Installing stainless steel cable rails. The bit included with the kit wore out after drilling 5 holes. So far I’ve used one bit for 10 holes and it’s still boring holes. Definitely recommend for stainless.
User
Very good drill did the work very well highly recommend
Very good drill , was able to drill 155 hole in 1/8 thick stainless steel with one bit and no lubricant . I have reprder different size due to good quailty for another project,
User
Clean Polish may fool?
They look nicely made , very clean polish and very sharp tips. Yet to test if they can cut or not, so lets update soon. One thing is very bad is the toy box they come in, not even worth the container. They scatter in the bag they come in. Luckily else they'd be in another state.
User
Not bad for the price
Not bad for the price.
User
Good drill bits
Works for what I needed it for
User
The Power Of Cobalt Compels You
These actually cut into my 30 year old exhaust bolts that I've been trying to drill out for weeks. Gotta keep em oiled and go slow and they will literally shred heat tempered metal. If you see smoke you are not doing it right. Slow down, you should see long coils of metal coming down from the bit, not tiny flakes or smoke, if you see those add oil and slow down. Cobalt is a brittle metal, don't push too hard, be very careful when it finally breaks through so you don't snap them off. If you push too hard, you'll snap them off. The slower you go the better, heat is not your friend! If the bit gets super hot it will get dull so keep it oiled, keep it slow, and take breaks if it feels like the bit is getting too hot.
User
Not as expected
It couldn’t cut a hole on thin stainless steel sheet at all. Expected much more.
User
Buen producto
Buen producto. Recomendado.
User
Seems high quality
very sharp & feels quality bit.
User
Buen producto
Buen producto
User
nice to have
very sharp
User
excelente calidad
Muy recomendable
Trustpilot
2 days ago
5 days ago