| Specifications | BK 280 | NK 4001 M | RM 280 | RM 320 | RM 400 | RM 480R | RM 610R |
| Linkage | 3-point - axial and deport | 3 point - axial | 3-pt mounted category 2 | Semi automatic | Semi automatic | 3-pt mounted category 2 and 3 | 3-pt mounted category 2 and 3 |
| Working width (m) | 2.8 | 4.05 | 2.8 | 3.2 | 4 | 4.8 | 6.1 |
| Overall width (m) | 3 | 4.47 | 3 | 3.5 | 4.35 | 5.2 | 6.45 |
| Transmission | 13/8"- 6 splines | 1 3/8" or 1 3/4" 6. 20 or 21 splines | 13/8"- 6 splines | 13/8"- 6 splines | With free wheel | 1 3/8" or 1 3/4" 6. 20 or 21 splines | 1 3/8" or 1 3/4" 6. 20 or 21 splines |
| Outer diameter of rotor (mm) | 620 | 703 | 650 | 650 | 703 | 620 | 620 |
| Diameter of rotor tube (mm) | 193.7 | 273 | 219 | 219 | 273 | 193.7 | 193.7 |
| Thickness of rotor tube (mm) | 8 | 7 | 10 | 10 | 10 | 10 | 10 |
| Speed of rotor/s at 540 min-1 (min-1) | 1840 | - | - | - | - | - | - |
| Speed of rotor/s at 1000 min-1 (min-1) | 1954 | 1714 | 1680 | 1760 | 1747 | 1714 | 1714 |
| Linear speed of rotor (m/s) at P.T.O 540 min -1 | 62 | - | - | - | - | - | - |
| Linear speed of rotor (m/s) at P.T.O 1000 min -1 | 66 | 63 | 57 | 60 | 64 | 55.6 | 55.6 |
| Number of universal Y knives with stubble pallets | 64 | 88 | 64 | 72 | 88 | 112 | 144 |
| Number of hammer knives | 32 | 44 | 32 | 36 | 44 | 56 | 72 |
| Drive | Free wheel | Bilateral 1 rotor | One side 1 rotor | Bilateral 1 rotor | Bilateral 1 rotor | Free wheel | Free wheel |
| Number / Type of belts | 4/SPBX1900 | 4+3/SPBX 2000 | 4/SPBX1900 | 3+3/SPBX1900 | 4+4/SPBX2000 | 4+4/SPBX | 5+5/SPBX |
| Weight (kg) | 1100 | 2320 | 1400 | 1820 | 2130 | 2600 | 3200 |
| Minimum power requirement for PTO (kW) | 54 | 84 | 52 | 60 | 84 | 110 | 140 |
| Minimum power requirement for PTO (hp) | 73 | 115 | 71 | 82 | 114 | 150 | 190 |
| Maximum authorised tractor power (kW) | 92 | 192 | 93 | 103 | 152 | 191 | 191 |
| Maximum authorised tractor power (hp) | 125 | 260 | 126 | 140 | 206 | 260 | 260 |
| Rear Hood | Moving | Moving | Moving | Moving | Moving | Moving | Moving |
| Height control | Roller or semi-pivoting wheels | Semi-pivoting wheels | - | - | Semi-pivoting wheels | Roller or semi-pivoting wheels | Roller or semi-pivoting wheels |