Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (5mm x 4pcs)
- Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- 3 Steps Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood.
- This Cobalt Drill Bit is Typically Capable of Running Three to Five 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.
- Includes :M42 Cobalt drill bit 5mm x 4pcs ,135 Degree Split Point
Estimated shipping
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 .
68-70 HRC,it means that the drill bits has 3X cutting ability and 2X durability.
This drill bits set is made of Premium Cobalt (80,000 dollars per ton).
8 % Cobalt gives high-speed steel more heat and wear resistance.
3 Steps design tip starts drilling immediately with less force and eliminates "walking" across the work surface.
The high HRC , Red hardness are suitable for drilling Stainless Steel and Hard Metals.
The STROTON cobalt bits definitely have More Cobalt in them than the "Cobalt" bits that HF sells--which are just Cobalt coated or Cobalt tipped.
Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel.
A high RPM does not improve drilling efficiency, but rather increases the heat between the bit and the workpiece, which may cause the bit to soften and the workpiece to harden.
Drill diameter≤5mm,RPM(1000~700)
5-10mm,RPM(700~350)
10-15mm,RPM(350~200)
Using cutting fluid will make the bit last longer.
Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer.
It also works adding some vinegar,soy sauce or water if you don't have engine oil.
Product details
Specifications
| Main Specification | |
|---|---|
| Surface Recommendation | Metal, Plastic |
| Material | High Speed Steel (Hss), Cobalt |
| Manufacturer | STROTON Ltd |
| Unit Count | 4 Count |
| Cutting Diameter | 5 Millimeters |
| Point Style | Split Point |
| Shank Type | Straight |
| Tool Flute Type | Spiral |
| Brand | STROTON |
| Cutting Angle String | 135 Degrees |
| Included Components | Drill Bits |
| Number of Pieces | 4 |
| Finish Type | Stainless Steel |
| Product information | |
|---|---|
| Set Name | STROTON Metric M42 8% Cobalt Drill Bits Set (5mm x 4pcs) |
| Technical Details | |
|---|---|
| Material Type | High Speed Steel (HSS), Cobalt |
| Part Number | M42 Cobalt-8( Independent Packaging) |
| Model | M42 Cobalt-8( Independent Packaging) |
| Number of Flutes | 2 |
| Style | |
|---|---|
| Finish Types | Stainless Steel |
| Others | |
|---|---|
| Product Type | Drill Bit Sets |
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