Use of drilling performance to improve rock, 2020-3-1 · The NX core (54.7 mm diameter) with 100 mm of height was divided into two parts: 25 mm for Brazilian disc tests (to measure TS) and 75 mm for drilling tests (to measure APR). Fragments of the tested samples were then collected, crushed using a laboratory-scale jaw crusher, and used for the grindability tests to determine the BWI.Steinexpo, 2020-4-20 · Crusher parts. Our dealers supply regular service parts for jaw crushers, cone crushers and impactor crushers. Powerscreen Crusher parts. ... "With the Premiertrak 600 now we can do 550 to 700 tph, where before we could only do up to maybe 250 tph" John Durkin Jr, USA. HEAD OFFICE. 200 Coalisland Dungannon Co. Tyrone BT71 4DR.