The HB11 and T31 Undercut bolts are designed for attachments on the rear surfaces of stone panels. This method of attachnment becomes necessary when the use of conventioanl pin system is not suitable. The undercut stone attachment method has advantages which can result in various benefits in material cost and installation time. HAZ Metal provides service in the design and technical support for using these systems.
system using undercut anchors
In order to achieve easy and secure fixing of the undercut anchors, special drilling needs to be made on the rear surface of the panels. This must be done with great care as any incorrect drilled holes will prevent the firm attachment of the undercut bolts on to the panels. Drilling is done using special drill bits with wet machining system. Machines and drill bits can be supplied by HAZ.
Drilling for HB11 Undercut BoltsDrilling is made with no core drill bits using wet system drilling machines. No tolerance drilled hole is essential for proper fixing.
Drilling for T31 Undercut BoltsDrilling is made with a customized designed machine using electroplated special made bits to drill the hole required.