Tungsten carbide drill bits, micro drills,solid tungsten carbide
drill bits,small carbide drill bits
A drill bit, is a cutting tool that can create holes by machining
workpiece in rotating motion. There are many sizes and shapes drill
bits, which have been standardized in metric or inch systems, and
the cross-sections of most drill bits are circular, but some
special drill bits can produce holes of which cross-sections are
not circular .
Fixed shank carbide drill bit standard size:
| d Cutting diameter | D Shank diameter | Lc Cutting length(mm) | L Overall length (mm) |
| 0.20-0.25mm | 3.0mm | 2mm | 38/40mm |
| 0.26-0.55mm | 3.0mm | 3mm | 38/40mm |
| 0.56-0.95mm | 3.0mm | 6mm | 38/40mm |
| 0.96-1.20mm | 3.0mm | 7mm | 38/40mm |
| 1.21-1.60mm | 3.0mm | 8mm | 38/40mm |
| 1.66-1.95mm | 3.0mm | 9mm | 38/40mm |
| 1.96-2.50mm | 3.0mm | 12mm | 38/40mm |
| 2.51-3.00mm | 3.0mm | 12mm | 38/40mm |
| 3.01-3.175mm | 3.175mm | 12mm | 50mm |
| 3.176-4.00mm | 4.0mm | 18mm | 50mm |
| 4.01-5.00mm | 5.0mm | 22mm | 50mm |
| 5.01-5.50mm | 6.0mm | 25mm | 50mm |
| 5.51-6.00mm | 6.0mm | 25mm | 50mm |
| 6.01-8.00mm | 8.0mm | 30-40mm | 75-80mm |
1,Tip angle 118°,d tolerance within 0.005mm
2, Standard size in stock, ready to ship.
2, Accept customize.
Parameters setting for carbide drill bit milling different
materials:
Work piece material |
Strength of extension σ b/MP a | Hardness HB | Feed f/(mm/r) | Speed V/(m/min) |
Coolant |
| d/mm |
| 5~10 | 11~30 | 5~10 | 11~30 |
Tool steel | 1000 1800~1900 2300 | 300 500 575 | 0.08~0.12 0.04~0.15 <0.02 | 0.12~0.2 0.05~0.08 <0.03 | 35~40 8~11 <6 | 40~45 11~14 7~10 |
Water-insoluble cooling oil
|
| Nickel chrome steel | 1000 1400 | 300 420 | 0.08~0.12 0.04~0.05 | 0.12~0.2 0.05~0.08 | 35~40 15~20 | 40~45 20~25 |
| Cast steel | 500~600 | —— | 0.08~0.12 | 0.12~0.2 | 35~38 | 38~40 |
| Stainless steel | —— | —— | 0.08~0.12 | 0.12~0.2 | 25~27 | 27~35 |
| Heat resistant steel | —— | —— | 0.01~0.05 | 0.05~0.1 | 3~6 | 5~8 |
| Gray iron | —— | 200 | 0.2~0.3 | 0.3~0.5 | 40~45 | 45~60 | Dry cut or emulsion |
| Alloy iron | —— | 230~350 | 0.03~0.07 | 0.05~0.1 | 20~40 | 25~45 | Water-insoluble cooling oil or emulsion
|
| —— | 350~400 | 0.03~0.05 | 0.04~0.08 | 8~20 | 10~25 |
| malleable cast iron | —— | —— | 0.15~0.2 | 0.2~0.4 | 35~38 | 38~40 |
Dry cut or emulsion |
| Brass | —— | —— | 0.07~0.15 | 0.1~0.2 | 70~100 | 90~100 |
| Cast bronze | —— | —— | 0.07~0.1 | 0.09~0.2 | 50~70 | 55~75 |
| Aluminum | —— | —— | 0.15~0.3 | 0.3~0.8 | 250~270 | 270~300 | Dry cut or gasonline |
| Hard rubber | —— | —— | 0.2~0.4 | 30~60 | |
| Thermosetting resin | —— | —— | 0.04~0.1 | 60~90 | |
| Plastic | —— | —— | 0.05~0.25 | 30~60 | |
| Glass | —— | —— | Manual | 4.5~4.7 | |
| Glass fiber composite material | —— | —— | 0.063~0.127 | 198 | |
Specification:
Diameter:1~20mm
Coating:Altin/Tialn/Tin/Tisin/Nano,Uncoated,Optional
Commonly used materials for drill bits are low carbon steel, high
carbon steel, high speed steel, cobalt steel, tungsten carbide,
polycrystalline diamond, etc. Surface coatings include black oxide,
titanium nitride (TiN), titanium aluminum nitride (TiAlN), titanium
carbonitride (TiCN) and diamond powder.
