5% Cobalt Drill Bits Set (3/8" x 2PCS) for Stainless Steel and Hard Metal
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- Premium 5% Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.
- This Cobalt Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit.
- 2Pcs 135 Degree Cobalt Jobber Drill Bits Set Includes :3/8" x 2pcs.(3 Flat Shank)
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Select a product to estimate shipping.Why choose STROTON cobalt drill bits?
The research shows that HSS with cobalt has a higher temperature resistance and Red hardness, a greater wear resistance(Hardness) and a higher heat treat response than HSS without cobalt .
Red hardness, it causes the hardened steel to have an ability to maintain hardness at approximately 860-880 °C .
66-69 HRC,it means that the drill bits has 3X cutting ability and 3X durability.
This drill bits set is made of Premium Cobalt (80,000 dollars per ton).
This drill bits set definitely have more cobalt in them than the "Cobalt" bits that HF sells--which are just Cobalt coated or only a tiny amount of cobalt tipped.
Compared with ordinary high speed steel, 5% cobalt provides better heat and wear resistance,and Hold up Better.
Split Point design tip starts drilling immediately with less force and eliminates "walking" across the work surface.
Ideal for Stainless steel,Hardened Steel,Cast Iron,Aluminum,Copper,Plastic and Hardwood.
The drill bit can be used for mechanical maintenance, such as drilling out bolts and screws.
Non-vertical use may cause the drill bit to break.
Using a drill press with sufficient power will make drilling easier.
Too high speed may burn the bit tip.
Drill bits diameter:
1/16≤3/16,RPM(1000~700)
3/16-3/8, RPM(700~350)
3/8-1/2, RPM(350~200)
Add Cutting Fluid or engine oil to prevent the stainless steel from overheating.
It also works adding some vinegar, soy sauce or water.
The drilling shall be started slowly by applying force slowly and gently until the drill bit starts chipping.
Product details
| Main Specification | |
|---|---|
| Surface Recommendation | Wood or Steel or Metal or Plastic or Iron or Stainless Steel or Aluminum or Pvc |
| Material | Stainless Steel or Cobalt |
| Manufacturer | STROTON Ltd |
| Unit Count | 2 Count |
| Cutting Diameter | 0.38 Inches |
| Point Style | Split Point |
| Shank Type | Straight |
| Tool Flute Type | Straight |
| Brand | STROTON |
| UPC | 643459995017 |
| Cutting Angle String | 135 Degrees |
| Number of Pieces | 2 |
| Finish Type | Uncoated |
| Product information | |
| Number of Packs | 2 |
| Set Name | 3/8 inch 2-Piece Set |
| Technical Details | |
| Material Type | Stainless Steel or Cobalt |
| Part Number | Cobalt 6 series bits inch |
| Model | Cobalt 6 series bits inch |
| Number of Flutes | 2 |
| Country of Origin | China |
| Style | |
| Finish Types | Uncoated |
| Others | |
| Product Type | Jobber Drill Bits |
| Minimum Bore Diameter | 0.38 inches |