Maintenance:
Regularly maintain the THK BNF2004V-2.5 ball screw, including cleaning, checking the wear of the balls and raceways, adjusting the preload, etc. If the THK BNF2004V-2.5 ball screw is found to have abnormal wear, increased noise or decreased accuracy, it should be repaired or replaced in time.
The joint motion of the robot usually requires a high-precision and high-rigidity transmission system. THK BNF2004V-2.5 ball screw can provide precise linear motion for the robot, thus realizing various actions of the robot.
In conclusion, THK BNF2004V-2.5 ball screw is a high-performance mechanical transmission component with the characteristics of high precision, high rigidity, high efficiency, low noise and long life. It is widely used in CNC machine tools, automated production lines, robots and medical equipment. When installing and using THK BNF2004V-2.5 ball screws, attention should be paid to installation requirements, lubrication and maintenance to ensure its performance and reliability.
| Model No. | Screw shaft outer diameterd |
Lead
Ph |
Ball center- to-center diameterdp |
Thread minor diameterdc |
No.of loaded circuitsRows X turns |
Basic load rating | Rigidity
K N/μm |
|
| Ca
kN |
Coa
kN |
|||||||
| BNF 1604V-5 | 16 | 4 | 16.5 | 13.8 | 2X2.5 | 7.8 | 17.4 | 290 |
| BNF 1605V-2.5 | 16 | 5 | 16.75 | 13.2 | 1×2.5 | 7.4 | 13.9 | 170 |
| BNF 1605V-5 | 16 | 5 | 16.75 | 13.2 | 2×2.5 | 13.5 | 27.9 | 320 |
| BNF 2004V-2.5 | 20 | 4 | 20.5 | 17.8 | 1X2.5 | 4.8 | 10.9 | 180 |
| BNF 2004V-5 | 20 | 4 | 20.5 | 17.8 | 2×2.5 | 8.6 | 21.8 | 350 |
| BNF 2005V-2.5 | 20 | 5 | 20.75 | 17.2 | 1×2.5 | 8.3 | 17.5 | 200 |
| BNF 2005V-5 | 20 | 5 | 20.75 | 17.2 | 2×2.5 | 15.1 | 35 | 380 |
| BNF 2010V-2.5 | 20 | 10 | 20.75 | 17.2 | 1×2.5 | 8.3 | 17.6 | 197 |
| BNF 2504V-2.5 | 25 | 4 | 25.5 | 22.8 | 1×2.5 | 5.2 | 13.7 | 210 |
| BNF 2504V-5 | 25 | 4 | 25.5 | 22.8 | 2×2.5 | 9.5 | 27.4 | 410 |
| BNF 2505V-2.5 | 25 | 5 | 25.75 | 22.2 | 1×2.5 | 9.2 | 21.9 | 240 |
| BNF 2505V-5 | 25 | 5 | 25.75 | 22.2 | 2×2.5 | 16.7 | 43.9 | 460 |
| BNF 2506V-2.5 | 25 | 6 | 26 | 21.4 | 1×2.5 | 12.4 | 27.4 | 250 |
| BNF 2506V-5 | 25 | 6 | 26 | 21.4 | 2×2.5 | 22.6 | 54.8 | 470 |
| BNF 2805V-2.5 | 28 | 5 | 28.75 | 25.2 | 1×2.5 | 9.7 | 24.6 | 250 |
| BNF 2805V-5 | 28 | 5 | 28.75 | 25.2 | 2×2.5 | 17.5 | 49.2 | 500 |
| BNF 2805V-7.5 | 28 | 5 | 28.75 | 25.2 | 3×2.5 | 24.8 | 73.8 | 740 |
| BNF 2806V-2.5 | 28 | 6 | 28.75 | 25.2 | 1X2.5 | 9.6 | 24.6 | 250 |
| BNF 2806V-5 | 28 | 6 | 28.75 | 25.2 | 2×2.5 | 17.5 | 49.2 | 500 |
| BNF 2806V-7.5 | 28 | 6 | 28.75 | 25.2 | 3×2.5 | 24.8 | 73.8 | 740 |
| BNF 3205V-2.5 | 32 | 5 | 32.75 | 29.2 | 1×2.5 | 10.2 | 28.1 | 280 |
| BNF 3205V-5 | 32 | 5 | 32.75 | 29.2 | 2×2.5 | 18.5 | 56.3 | 560 |
| BNF 3205V-7.5 | 32 | 5 | 32.75 | 29.2 | 3×2.5 | 26.2 | 84.4 | 810 |
| BNF 3206V-2.5 | 32 | 6 | 33 | 28.4 | 1×2.5 | 13.9 | 35.2 | 290 |
| BNF 3206V-5 | 32 | 6 | 33 | 28.4 | 2X2.5 | 25.2 | 70.3 | 580 |
| Nut dimensions | Screw shaft inertial moment/mmkg·m²/mm |
Nut masskg |
Shaft masskg/m |
Maximum permissible rotation speedmin- |
|||||||
| Outer diameterD |
Flange diameter D₁ |
Overal lengthL |
H | B₁ | PCD | d₁ ×d₂Xh | Lubrication hole A |
||||
| 36 | 59 | 53 | 11 | 42 | 47 | 5.5×9.5×5.5 | M6 | 5.05×10- | 0.42 | 1.42 | 5000 |
| 40 | 60 | 41 | 10 | 31 | 50 | 4.5×8×4.5 | M6 | 5.05X10- | 0.37 | 1.37 | 5000 |
| 40 | 60 | 56 | 10 | 46 | 50 | 4.5×8×4.5 | M6 | 5.05×10 | 0.49 | 1.37 | 5000 |
| 40 | 63 | 37 | 11 | 26 | 51 | 5.5×9.5×5.5 | M6 | 1.23×10- | 0.3 | 2.22 | 4870 |
| 40 | 63 | 49 | 11 | 38 | 51 | 5.5×9.5×5.5 | M6 | 1.23×10-7 | 0.49 | 2.22 | 4870 |
| 44 | 67 | 41 | 11 | 30 | 55 | 5.5×9.5×5.5 | M6 | 1.23×10-7 | 0.46 | 2.19 | 4810 |
| 44 | 67 | 56 | 11 | 45 | 55 | 5.5×9.5×5.5 | M6 | 1.23X10- | 0.6 | 2.19 | 4810 |
| 46 | 74 | 58 | 15 | 43 | 59 | 5.5×9.5×5.5 | M6 | 1.23×10-7 | 0.68 | 2.46 | 4810 |
| 46 | 69 | 36 | 11 | 25 | 57 | 5.5×9.5×5.5 | M6 | 3.01×10-7 | 0.21 | 3.6 | 3920 |
| 46 | 69 | 48 | 11 | 37 | 57 | 5.5×9.5×5.5 | M6 | 3.01×10-7 | 0.55 | 3.6 | 3920 |
| 50 | 73 | 40 | 11 | 29 | 61 | 5.5X9.5X5.5 | M6 | 3.01X10 | 0.52 | 3.52 | 3880 |
| 50 | 73 | 55 | 11 | 44 | 61 | 5.5×9.5×5.5 | M6 | 3.01X10- | 0.68 | 3.52 | 3880 |
| 53 | 76 | 44 | 11 | 33 | 64 | 5.5X9.5X5.5 | M6 | 3.01×10-7 | 0.61 | 3.43 | 3840 |
| 53 | 76 | 62 | 11 | 51 | 64 | 5.5×9.5×5.5 | M6 | 3.01×10-7 | 0.91 | 3.43 | 3840 |
| 55 | 85 | 44 | 12 | 32 | 69 | 6.6×11×6.5 | M6 | 4.74×107 | 1.02 | 4.45 | 3470 |
| 55 | 85 | 59 | 12 | 47 | 69 | 6.6×11×6.5 | M6 | 4.74×10-7 | 1.06 | 4.45 | 3470 |
| 55 | 85 | 74 | 12 | 62 | 69 | 6.6×11×6.5 | M6 | 4.74×107 | 1.16 | 4.45 | 3470 |
| 55 | 85 | 50 | 12 | 38 | 69 | 6.6×11×6.5 | M6 | 4.74X10- | 0.87 | 4.52 | 3470 |
| 55 | 85 | 68 | 12 | 56 | 69 | 6.6×11×6.5 | M6 | 4.74X10-7 | 1.09 | 4.52 | 3470 |
| 55 | 85 | 86 | 12 | 74 | 69 | 6.6×11×6.5 | M6 | 4.74×10-7 | 1.3 | 4.52 | 3470 |
| 58 | 85 | 41 | 12 | 29 | 71 | 6.6X11X6.5 | M6 | 8.08X10- | 0.76 | 5.89 | 3050 |
| 58 | 85 | 56 | 12 | 44 | 71 | 6.6×11×6.5 | M6 | 8.08×10-7 | 0.94 | 5.89 | 3050 |
| 58 | 85 | 71 | 12 | 59 | 71 | 6.6X11X6.5 | M6 | 8.08X10 | 1.13 | 5.89 | 3050 |
| 62 | 89 | 45 | 12 | 33 | 75 | 6.6×11×6.5 | M6 | 8.08×10-7 | 0.94 | 5.88 | 3030 |
| 62 | 89 | 63 | 12 | 51 | 75 | 6.6×11×6.5 | M6 | 8.08X10- | 1.21 | 5.88 | 3030 |
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