Quality of ONTON SDA self-drilling anchor microplies is ensured through regular quality testing
Self drilling micropiles are frormed from a fully thread steel bar with a hollow core which is drilled and simultaneously grouted into soils without a casing. With more than 20 years experience of manufacturing , ONTON can porduce stable and uniform self drilling soil nails in batch. The stability of each batch hollowbar anchors is important to either customers or manufacturers.
- Tests dimensions and tolerances of rope threads to be used on rope threaded drill steel equipment for percussive drilling.
- Rope thread according to ISO 1720 & 10208.