PDFI

The PDFI Series features an internal return flange double nut design, engineered for high-precision applications requiring superior axial rigidity and zero backlash. By utilizing a double nut preloading system, this series ensures exceptional mechanical stability and accuracy for demanding motion tasks.
Available in shaft diameters ranging from 16 mm to 80 mm, the PDFI series is built for reliable performance. It offers dynamic load ratings up to 4,991 Kgf and peak static load capacities of 17,366 Kgf. With a maximum rigidity of 205 Kg/µm, it provides the precision necessary for high-end CNC machining and automated positioning systems.
Key benefits
- Enhanced Axial Rigidity: Double nut configuration provides superior stiffness for precision tasks.
- Zero Backlash: Preloaded system eliminates axial play, ensuring highly accurate bidirectional motion.
- High Load Capacity: Robust construction allows for handling significant dynamic and static loads.
- Smooth Operation: Optimized internal return system reduces friction and noise during travel.
Applications
- Precision CNC turning and vertical machining centers.
- Industrial robotics and high-accuracy automated positioning systems.
- XY inspection tables and semiconductor manufacturing equipment.
- Aerospace components and medical high-accuracy instrumentation.
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Specifications

| Model No. | Dimensions | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | I | Da | D | A | B | L | W | H | X | Y | Z | Q | n | Ca (Kgf) | Coa (Kgf) | K (Kg/µm) | |
| PDFI01604-4 | 16 | 4 | 2.381 | 30 | 49 | 10 | 80 | 39 | 34 | 4.5 | 8 | 4.5 | M6 | 4 | 625 | 1254 | 42 |
| PDFI01605-4 | 5 | 3.175 | 30 | 49 | 10 | 100 | 39 | 34 | 4.5 | 8 | 4.5 | M6 | 4 | 888 | 1525 | 43 | |
| PDFI02004-4 | 20 | 4 | 2.381 | 34 | 57 | 11 | 80 | 45 | 40 | 5.5 | 9.5 | 5.5 | M6 | 4 | 693 | 1584 | 53 |
| PDFI02005-4 | 5 | 3.175 | 34 | 57 | 11 | 101 | 45 | 40 | 5.5 | 9.5 | 5.5 | M6 | 4 | 999 | 1995 | 53 | |
| PDFI02504-4 | 25 | 4 | 2.381 | 40 | 63 | 11 | 80 | 51 | 46 | 5.5 | 9.5 | 5.5 | M6 | 4 | 775 | 2046 | 65 |
| PDFI02505-4 | 5 | 3.175 | 40 | 63 | 11 | 101 | 51 | 46 | 5.5 | 9.5 | 5.5 | M8 | 4 | 1119 | 2581 | 66 | |
| PDFI02510-4 | 10 | 4.762 | 46 | 72 | 12 | 145 | 58 | 52 | 6.5 | 11 | 6.5 | M6 | 4 | 1903 | 3695 | 67 | |
| PDFI03204-4 | 32 | 4 | 2.381 | 46 | 72 | 12 | 80 | 58 | 52 | 6.5 | 11 | 6.5 | M6 | 4 | 868 | 2640 | 83 |
| PDFI03205-4 | 5 | 3.175 | 46 | 72 | 12 | 102 | 58 | 52 | 6.5 | 11 | 6.5 | M8 | 4 | 1264 | 3403 | 84 | |
| PDFI03210-4 | 10 | 6.35 | 54 | 88 | 15 | 162 | 70 | 62 | 9 | 14 | 8.5 | M8 | 4 | 3093 | 6102 | 86 | |
| PDFI04005-4 | 40 | 5 | 3.175 | 56 | 90 | 15 | 105 | 72 | 64 | 9 | 14 | 8.5 | M8 | 4 | 1407 | 4342 | 104 |
| PDFI04010-4 | 10 | 6.35 | 62 | 104 | 18 | 165 | 82 | 70 | 11 | 17.5 | 11 | M8 | 4 | 3480 | 7979 | 106 | |
| PDFI05010-4 | 50 | 10 | 6.35 | 72 | 114 | 18 | 171 | 92 | 82 | 11 | 17.5 | 11 | M8 | 4 | 3898 | 10326 | 132 |
| PDFI06310-4 | 63 | 10 | 6.35 | 85 | 131 | 22 | 182 | 107 | 95 | 14 | 20 | 13 | M8 | 4 | 4402 | 13611 | 165 |
| PDFI08010-4 | 80 | 10 | 6.35 | 105 | 150 | 22 | 182 | 127 | 115 | 14 | 20 | 13 | M8 | 4 | 4900 | 17366 | 207 |
Note: with sign ★ can produce left helix
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