4,5 mm Ø Cobalt stub drill bit PZ
1 Drill bit in plastic sleeve for easy retail
merchandising and display.
PZ for Armoured Steel (Panzer Stahl) applications or materials like stainless
steel.
![Cobalt stub drill bit [example]](https://cdn.shopify.com/s/files/1/0019/0214/9721/files/ALP_921_series_sm1.jpg?15520)
Range
of application:
5% cobalt-alloyed high-efficiency drills with reinforced web. Especially suitable for drilling stainless steel, acid-resisting steel, spring-steel. Best for hand held operations.
For drilling into:
Art.-No: 00 921004501 00 |
| Strengths | |
| HIGHLY ACCURATE | special shape, drills without center-punching |
| STABLE | More stable due to reinforced web |
| INDUSTRIAL QUALITY | suitable for NC machines |
| SELF-CENTRING | thanks to special point shape |
| SHORT | Extra short design for hand-held drills |
| Cooling recommendations for Cobalt drills | |||
| Material | Hardness | Coolant | |
 |
Steel | < 400 N/mm2 | Emulsion |
|
|
Steel | < 850 N/mm2 | Emulsion |
|
|
Steel | < 1.100 N/mm2 | Emulsion |
|
|
Steel | < 1.300 N/mm2 | Emulsion or Oil |
 |
Stainless Steel | Emulsion | |
 |
Cast iron | Dry / Compressed Air / Emulsion | |
 |
Titanium | Oil | |
 |
Copper and Brass | Oil | |
 |
Aluminium | Emulsion | |
 |
Composites and Plastics | Emulsion / Water / Air | |
Sharpening angles and Point shapes
Drill bits are not all the same. Special materials and the different applications need different cutting angles and point shapes. Refer to the table below to learn more about point shapes and the lip angles.
 |
 |
 |
 |
Relieved cone,
|
Split Point AC,
|
Split Point C,
|
Centering Point-Shape E, 180° |
| Universal point-shape for a lot of drilling applications in steel and iron, non ferritic-materials, plastics and other materials. | Point-shape with increased performance and very good centering. This point shape is being used for all industrial drill bits. |
Special point-shape for stainless steels and special materials. |
Special point-shape for spot weld drills. |
| Specifications | ||
| Description | Spec | Sample |
| Drill diameter | 4,5 mm |
 |
| Quantity in sleeve | 1 piece | |
| Type | HSS Cobalt PZ Armoured Steel |
|
| Standard | DIN 1897 | |
| Drilling depth | 3 x d | |
| Point angle | 130° | |
| Point grind | Split point | |
| Surface | Bright | |
| Drill material | HSS-ECo | |
