Product Description
The 90 mm CIR90 ballistic button bit is a down-the-hole tool for mine blasting, quarry work, and competent construction rock where a CIR90 hammer system is available. The named shank family removes one major compatibility uncertainty, but retaining parts and actual hammer dimensions still need confirmation. Review the operation in the mining and exploration application archive and evaluate rock strength through the hard formation archive. It is not intended to drill loose gravel without an appropriate bore-support plan.
The source states a 90 mm black-diamond ballistic button structure for a CIR90 DTH hammer. The engineering description uses an alloy-steel DTH body with fixed wear-resistant carbide buttons and a CIR90 connection family. It does not assert a button count, face style, spline dimensions, foot-valve configuration, or flushing-port area. CIR90 naming narrows the shank selection but does not replace inspection of the actual hammer and bit drawings. Confirm the gauge, retaining system, and air path before the tool is assembled.
Use 1,000–3,000 lbf/in of diameter, 25–60 RPM, and hammer-approved air within the referenced 0.7–2.4 MPa DTH range. Hard and abrasive formations fit the impact mechanism; fractured zones require reduced loading until stable seating returns. Check the retaining system after the first run and whenever impact sound or air return changes. Flow remains blank because pressure alone does not define delivered air volume. The explicit limitation is that wear resistance is descriptive and does not guarantee footage. Mining and drilling classification information can be reviewed through the IADC.