Cross-grinding is a common type of grinding: P3, P5 and P9. P3 drill point angle of 135 °, P5 is 118 °, and P9 is a cobalt-based cemented carbide made of P3 drill, drill point angle is 135 °. Cross grinding drill good self centering performance, for example, the formation of a 0.05mm ~ 0.2mm drill core thickness 6.35mm ~ 12.7mm diameter drill bit, Phillips grinding, like needlepoint, self-centering.

Choiniere, the Superion company manager, said that in order to drill holes in the raised surface, usually on the bit to make a self-centering tip point to ensure the cusp first contact with the workpiece to the drill bit diameter, that is, if the operator to tilt 15 ° convex surface drilling, then the angle of inclination of the cutting edge of all the drill must be greater than 15 °, so that the drill bit tip of the first contact with the workpiece surface, otherwise, the operator must make use of the relatively flat end cutting edges of the tool (such as end milling the first milling cutters), generally greater than 6 ° slant drilling application endmills, pre-processing, prevents drilling offset or cited biased.abrasive wheel

According to Geske introduction, select the depth of the drill bit and drilling. Because this will affect the type of drill bit (such as the drill bit is conventional channel-shaped, or parabolic trough). Recommend using parabolic trough hole depth is greater than four times the diameter of the drill bit. Wide trench, allowing faster cutting speed and a larger hole depth.grinding wheel

Tungsten the abrasive belt saw blade and diamond (sand) with the difference between the different characteristics of the saw blade?
The tungsten the sand band saw (blade) compared to the advantages of carbide band saw or diamond with
A. carbide saw with:
A * saw superhard metal, an alloy
Carbide saws with usually three teeth per inch. Sawing size of less than 2 inches (50mm) of the hard metal or alloy, and each tooth to withstand the power will be too large, resulting in tooth fracture. Breaking a tooth, the whole band saw will be scrapped. The wolfram Saw with hundreds into the the sawing teeth, therefore good cutting tool.
* Sawing reinforced composite material
Many composites contain advanced reinforced material, such as glass fiber, Kevlar fiber, ceramics, cutting wheel and Nuomeikesi polyamide. They may contain different brands of resin, or a laminate of different materials. These reinforcing material will make jagged to pull off. The composite material itself is very abrasive, even Carbide Saw band may be worn not sharp. Rubber tires containing metal wire, the traditional serrated will be pulled off.
* Sawing material containing pores
Saw engine, gas flow meter and other industrial heat exchangers, the saw blade is needed in these sawing was in the hole in the back and forth. Serrated to the sink hole, when it encounters a very rigid cross section, and its location is too low, abrasive disc,will be exposed to great force, causing the tooth portions pulled off.