What brand is good for rotary drilling machine?
If you choose domestic. Well then. Zhonglian, CSR, 31, XCMG essentially different. 31, the South Locomotive and Xugong initial use of Carter chassis. And they claim to be imported cards. Of course, Carter chassis is also made in China (Xuzhou production? It sounds like I forgot who said it. Now this point few imported Carter chassis may. Because the freight can not get through. The advantage of the Carter chassis is quality stability (that doesn't mean that all homemade chassis is not good). Standard unification. The drawback is maintenance and a high cost of maintenance. The fuel costs are substantial today. It's not a small expense either. About homemade sites. Zhonglian, 31, XCMG and CSR are developing. And the earliest development of United china. From the beginning of doing the digging, are in their own production of homemade bottom. Quality is also very pass. Xcmg. 31, recently also made homemade bottom. There seems to be some technical difficulty. South Locomotive Work late. There is news that the homemade bottom is Sichuan bonlee of CSR (non reliable).
About aftermarket. CSR mainly rely on after-sales service and Caterpillar after-sales system. Zhonglian, 31, Xugong are their own aftermarket forces. Of course。 Many of the Carter chassis are Caterpillar's men. 31 aftermarket system in mid 2011 last year. Some relaxation. A lot of people ran (I was in Beijing). Many of my friends have gone, the specific reason seems to be 31 restructuring. So at this stage do not superstition 31 aftermarket. A lot of people are new people.
First of all, depends on what project you do, that is, the so-called geological conditions. If it's pure soil. What rig?. It doesn't make much difference from the larger rig. Also depends on your engineering unit price?. There are no strata that cannot be struck. Only a hard price.
