... with capacity of 100m/nq capacity, suitable for soil testing, SPT testing Mini Crawler Drilling Rig. ... Suitabble for diamond core drilling, carbide core drilling, SPT test ... Dia. 42 mm3. Drilling Angle 90° ~ 75°4 Rotary UnitSpindle Speed (4 shift) 71,142,310,620 rpmSpindle ... .1 kw/2000 rpm mini crawler drilling machine for soil testing, SPT testing