down-the-hole Rock drill bit rock drill bit R32, R38, T38, T45, T51 for mining and
quarry
1 Presentation of rock drill bit
With the top quality of alloy steels imported from USA and the best
carbides made in China , we produce all threaded button bits by hot
press technology .
2.Materials and produce process details of rock drill bit
Materials- we use 45CrNiMoVA and YK05 Tungsten carbide to produce
our taper drill bit, both are famous materials for drill bit
produce in the world .Advanced technology---We produce our taper button drill bit with
hot-pressing technology which is the best-advanced technology of
producing taper button bit up to date .
Button bits should be reground when penetration rates drop or if
the cemented carbide shows signs of damage
Fixed grinding routines often result in good working practices .
Bits for instance , can be examined and then reground after a
specific number of holes , or at the end of the shift . Premature
grinding is not necessarily uneconomical since less carbide needs
to be ground off . It is better to regrind rather than reducing
productivity due to damage .
Correct grinding adds considerably to drill bit service life . But
equally important , it also enhances the performance of the entire
drilling operation , especially hole straightness .
3.A comprehensive range of various button bits shown as below:
| Thread sizes | R25, R28, SSR28, R32, SSR32, R35, SSR35, R38, T38, T45, T51, SST58,
SST68, SGT60; |
| Head diameters | 33mm ~ 152mm |
| Face designs | flat face, drop center, uni-face |
