| How to choose drill bits? |
For wood: these types of drill bits can be used on any wood, whether it is softwood, hardwood, veneer or plywood.For metal: these drill bits are used to drill any kind of metal. When it comes to drill bits for metal, inserts are only used for machine tools.For masonry: these steel drill bits have a brazed tungsten carbide tip.For tile and glass: these drills bits look like small spears. They are characteristically used with a low drilling speed .
| Manufacturing | Surface Finish | Sharpening |
| White | Black | B&W | Tin Coated | Amber | Black&Gold | 118° | 135°S.P. | Turto Max | 118°S.P | Web Thinning |
| Rolled Forged |
| √ | √ |
|
|
| √ | √ |
| √ |
|
| Rolled Polished | √ | √ | √ | √ | √ |
| √ | √ |
| √ |
|
| Fully Ground | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
|
| Milled | √ | √ | √ | √ |
| √ | √ |
|
|
| √ |
| Standards | DIN338,DIN1897,DIN340,DIN1869,DIN345,DIN333 |
| Jobber length,ScrewMachine Length,Taper length,Aircraft Extension |
| Material | HSS4241,HSS4341,HSS6542(M2),HSS CO5%(M35),HSS CO8%(M42) |
| Shank | Straight shank(Parallel shank), Reduced Shank, hex shank,1/4″Quick change shank,3Flats shank,1/2"shank,3/8"shank |
| Helix Angle | Type N,Type W,Type H |
| Rotating | Right Hand,Left Hand |
| Flute | Normal,parabolic |
| HSS NO. | HSS GRADE | HRC(Rockwell Hardness) |
| 4241 | Mo2Cr4Vsi | 60-62 |
| 4341 | Mo3Cr4Vsi | 62-65 |
| 9341 | Mo3Cr4V | 63-66 |
| 6542/M2 | Mo5Cr4V2 | 63-66 |
| M35 | Mo5Cr4V2Co5 | 64-67 HSS Co5% |
Raw material cost advantages:
Sino abrasives limited are cooperated with the best partners including international suppliersand domestic suppliers:3M, NCA BUFFALO, CUMI, SINOMACH, ZHONGNAN, ZZSM and so on.
Quality supervise system
We firmly believe that management is the first productive force. Sino abrasives limited had been certificated by ISO 9001 at 2009.
Meanwhile, we had built ourselves quality management system- Smart system. Advanced chemical analysis equipment, scientific quality control methods, strict management system had ensured we can do standardized regulation and information records for daily work: it starts from rawmaterials, to production, to the finished product testing and so on.
1. Are you are a manufacturer?
A: Yes, we have our own factory, and have excellent research team, and strict quality inspection procedures. We will sure don't
have middleman. Also welcome you visit our factory.
2. What about your quality?
A: We have strict quality inspection procedures, and each of our ner products have been tested before launching it in the market.
3. Can you provide samples?
A: Yes, we can provide samples for you, yet the express fee need be paid by you.
4. If you don't have the size I need, can I have a requirement?
A: Yes, if the size you need we don't have, we can manufacturer as your requirement. It will have a minimum order.
Complaint
