ERU ROTATING CUTTER
Rotation units for use with excavator mounted drum cutters
Rotating Cutters
When combined with the endlessly rotating Erkat rotation units, rotary drum cutters can be located in the ideal position to meet cutting requirements. All rotation units have a hydraulic swivel joint as standard allowing endless rotation.
Combining your standard Erkat drum cutter with a rotation unit is a simple procedure. Erkat rotation units can also be fitted to drum cutters from other manufacturers.
In total there are 7 models that can be used on excavators from 2 to 70 tons. The ERU 3 and larger models are fitted with two hydraulic motors as standard.
- Long lasting and robust worm gear and gearbox
- Components made to tight tolerances
- Worm gear made from high-quality steel
- Heavy duty bearings
- Hydraulic swivel joint with maximum oil flow capacity up to 450 l/min
- Continuous and infinite rotation
- Extremely high holding torque; up to 350 kNm
- Compact and low maintenance
- Double rotation motors used in models ERU 3 and upwards
ERU Range – Rotating Cutter Technology Product Brochure
Click here to download the Erkat brochure.
| ERU 1 | ERU 2 | ERU 3 | ERU 4 | |||
|---|---|---|---|---|---|---|
| Recommended excavator weight | t | 2 - 5 | 5 - 8 | 9 - 15 | 15 - 25 | |
| Diameter of gearbox (A) | mm | 270 | 370 | 460 | 570 | |
| Overall height of rotator (B) | mm | 415 | 450 | 520 | 620 | |
| Length (C) | mm | 445 | 640 | 760 | 770 | |
| Height (D) | mm | 370 | 500 | 600 | 700 | |
| Max. oil flow of rotary feedthrough | l/min | 60 | 100 | 130 | 170 | |
| Max. hydr. pressure of rotary feedthrough | bar | 350 | 350 | 350 | 350 | |
| Max. oil flow of rotary drive | l/min | 10 | 10 | 30 | 40 | |
| Max. hydr. pressure for rotary drive | bar | 160 | 160 | 160 | 160 | |
| Max. holding torque of rotator drive | Nm | 4,000 | 11,100 | 44,700 | 95,000 | |
| Number of rotary drive motors | Pcs | 1 | 1 | 2 | 2 | |
| Weight | kg | 160 | 200 | 440 | 700 | |
| Recommended for Erkat drum cutter | Type | ER 50 | ER 100 | ER 250, ER 600 | ER 650 | |
| ERU 5 | ERU 6 | ERU 7 | |||
|---|---|---|---|---|---|
| Recommended excavator weight | t | 25 - 40 | 30 - 50 | 50 - 70 | |
| Diameter of gearbox (A) | mm | 610 | 700 | 900 | |
| Overall height of rotator (B) | mm | 635 | 640 | 820 | |
| Length (C) | mm | 770 | 910 | 1,040 | |
| Height (D) | mm | 780 | 860 | 1,170 | |
| Max. oil flow of rotary feedthrough | l/min | 320 | 320 | 450 | |
| Max. hydr. pressure of rotary feedthrough | bar | 350 | 350 | 350 | |
| Max. oil flow of rotary drive | l/min | 40 | 40 | 60 | |
| Max. hydr. pressure for rotary drive | bar | 160 | 160 | 160 | |
| Max. holding torque of rotator drive | Nm | 200,000 | 270,000 | 350,000 | |
| Number of rotary drive motors | Pcs | 2 | 2 | 2 | |
| Weight | kg | 900 | 1,000 | 2,000 | |
| Recommended for Erkat drum cutter | Type | ER 1200, ER 1500 | ER 1500, ER 1700, ER 2000 | ER 3000 | |
