STHZ-20 Concrete Hollow Boring Machine

STHZ-20 Concrete Hollow Boring Machine, drilling machine, testing equipment 1. Application: STHZ-20 concrete hollow boring machine is used to core drilling of concrete, limestone and foundation for compression and flexural testing in highway, airport, port and dam etc. It also can be used for scientific core drilling. It is also suitable for the core drilling of other non-metal materials, like fire-proof material, ceramics,glasses and rock. 2. Characteristic: Use imported gasoline engine, drive conveniently, run reliably, operate simplyNo need electric powerequipped with man-made PCD thin drilling bitBoring and sampling size accuratelyThe surface is smotth after boring, don't damage the drill materials 3. Main technical parameter: Max. hollow boring depth: 400mmMax. hollow boring diameter: 200mmBoring direction: vertical downFeeding mode: manualMain shaft speed: 800~1200r/minDrill type: man-made PCD thin drilling bitDrive: gasoline engine (power: 5.5HP, speed: 3600r/min)