... F-1000 series have done high-end grinding process, why do grinding on the mud pump, the following reasons:1. ... expensive. Until today, only, Baoji, tiger rig, will do this process.2. A new CNC grinding machine which ... the original cost of 20000-300000/ units.That is why some pumps are so cheaper, but no customer buy ... careful grinding process on pump, but we still do it! Because it is good for end user ...