Rotary hydraulic drive system KRX 30

for drilling rigs

Product

• Model: KRX 30
• Product family: KRX Powertool drives
• Function: combined milling and drilling unit for hydraulic excavators

Applications

• Surface milling, trenching and core drilling in rock and mixed ground
• Suitable for road repair, trenching and excavation tasks on compact excavators

Technical data

• Recommended excavator weight: 5 – 8 t (10K – 20K lb)
• Rated power: 30 kW (40 hp)
• Length of drive unit: 550 mm (22 in)
• Torque at 380 bar: 4400 Nm (3300 lbf·ft)
• Max. idle oil flow: 110 l/min (29 gal/min)
• Max. operating pressure: 400 bar (5800 psi)
• Weight without attachment: 160 kg (353 lb)
• Hex connection, standard: 80 mm (3 in)
• Standard hole pattern: LB10
• Length of standard cutter head: 350 mm (14 in)
• Diameter of standard cutter head: 370 mm (15 in)
• Cutting force at 380 bar: 23.9 kN (5400 lbf)
• Recommended idle rpm: 80 rpm
• Recommended idle oil flow: 50 – 70 l/min (13–18 gal/min); alternate spec: 30 – 65 l/min (8–17 gal/min)
• Weight of milling attachment: 67 kg (149 lb)
• Total weight: 227 kg (502 lb)
• Pick box: PH 22 Type; Number of picks: 26 pcs
• Standard picks: round shaft 12/45/38/22 HC and dragon tooth 22/46/38/22 HC
• Drilling range: min. diameter 270 mm (11 in) — max. diameter 600 mm (24 in)
• Max. drilling depth: 1 500 mm at max diameter / 2 500 mm at min diameter
• Max. uniaxial compressive strength of ground: 10 MPa (1 450 psi)

Installation and compatibility

• Mounting interface: LB10 hole pattern and 80 mm hex connection; verify carrier adapter compatibility
• Ensure excavator hydraulic system can supply recommended flow and operating pressure
• Check carrier lifting and ballast capacity against total weight (227 kg)

Drawing / Illustration
Technical drawing image is provided for dimensions and mounting details.

Characteristics / Technical specifications

• Model: KRX 30 — rated power 30 kW, torque 4 400 Nm (at 380 bar)
• Operating pressure up to 400 bar, max idle flow 110 l/min
• Cutter head: length 350 mm × diameter 370 mm; cutting force 23.9 kN (380 bar)
• Pick system PH 22 with 26 picks; standard pick types as specified
• Drilling: diameter 270–600 mm, depth up to 2 500 mm (at min diameter)
• Suitable for excavators 5–8 t; total unit weight 227 kg