Dfa - PTFE Hydraulic Bearing Element with NBR/FKM O-Ring
DFA
Quantity:
1. Application and properties
Suitable for piston guide and plays a supporting and guiding role for piston. It has excellent vibration damping performance, simple and firm installation, and the pairing of metal and plastic materials can prevent"stagnation"and"bite death"phenomenon.
With a built-in axial positioning step in the middle, the two ends can be in contact with or open to the sealing element, which greatly saves installation space and is commonly used in oil/gas cylinders with limited axial dimensions.
Advantages: The radial size is large, even if the wear deformation is a certain amount, it can be a good isolation piston and hole, prevent them from contacting, and have a good protection for the hole.
2. Standard material
Filled PTFE / PA /POM
3. Working conditions
Working conditions | |||
Diameter Range | Temperature Range°C | Speed | Medium |
40～1000mm | -200～250℃ | 15m/s | General hydraulic oil, emulsion, water |
4. Marking method:
Mark with the dimensions of installation groove as below:
For example: DFA100×92×14
5. Installation Dimensions
| D | d | d1 | H | c | a | Part No. |
| 40 | 32 | 36 | 12 | 3 | 4.7 | DFA0400 |
| 45 | 37 | 41 | 12 | 3 | 4.7 | DFA0450 |
| 50 | 42 | 46 | 12 | 3 | 6.2 | DFA0500 |
| 55 | 47 | 51 | 12 | 3 | 6.2 | DFA0550 |
| 56 | 48 | 52 | 12 | 3 | 6.2 | DFA0560 |
| 57 | 49 | 53 | 12 | 3 | 6.2 | DFA0570 |
| 58 | 50 | 54 | 12 | 3 | 6.2 | DFA0580 |
| 60 | 52 | 56 | 12 | 3 | 6.2 | DFA0600 |
| 63 | 55 | 59 | 12 | 3 | 6.2 | DFA0630 |
| 65 | 57 | 61 | 12 | 3 | 6.2 | DFA0650 |
| 70 | 62 | 66 | 12 | 3 | 6.2 | DFA0700 |
| 75 | 67 | 71 | 12 | 3 | 6.2 | DFA0750 |
| 80 | 72 | 76 | 14 | 3 | 7.2 | DFA0800 |
| 85 | 77 | 81 | 14 | 3 | 7.2 | DFA0850 |
| 90 | 82 | 86 | 14 | 3 | 7.2 | DFA0900 |
| 95 | 87 | 91 | 14 | 3 | 7.2 | DFA0950 |
| 100 | 92 | 96 | 14 | 3 | 7.2 | DFA1000 |
| 105 | 97 | 101 | 14 | 3 | 7.2 | DFA1050 |
| 110 | 102 | 106 | 14 | 3 | 7.2 | DFA1000 |
| 115 | 107 | 111 | 14 | 3 | 7.2 | DFA1150 |
| 120 | 112 | 116 | 14 | 3 | 7.2 | DFA1200 |
| 125 | 115 | 121 | 17.5 | 4 | 9.2 | DFA1250 |
| 130 | 120 | 126 | 17.5 | 4 | 4.3 | DFA1300 |
| 135 | 125 | 131 | 17.5 | 4 | 9.2 | DFA1350 |
| 140 | 130 | 136 | 17.5 | 4 | 9.2 | DFA1400 |
| 145 | 135 | 141 | 17.5 | 4 | 9.2 | DFA1450 |
| 150 | 140 | 146 | 17.5 | 4 | 9.2 | DFA1500 |
| 155 | 145 | 151 | 17.5 | 4 | 9.2 | DFA1550 |
| 160 | 150 | 156 | 17.5 | 4 | 9.2 | DFA1600 |
| 170 | 160 | 166 | 20 | 6 | 9.2 | DFA1700 |
| 180 | 170 | 176 | 20 | 6 | 9.2 | DFA1800 |
| 190 | 180 | 186 | 20 | 4.5 | 11.7 | DFA1900 |
| 200 | 190 | 196 | 20 | 4.5 | 11.7 | DFA2000 |
| 210 | 200 | 206 | 25 | 8 | 11.7 | DFA2100 |
| 220 | 210 | 216 | 25 | 8 | 11.7 | DFA2200 |
| 225 | 215 | 221 | 25 | 8 | 11.7 | DFA2250 |
| 230 | 220 | 226 | 25 | 8 | 11.7 | DFA2300 |
| 250 | 240 | 246 | 33 | 15 | 11.7 | DFA2500 |
| 265 | 255 | 261 | 33 | 15 | 11.7 | DFA2650 |
| 280 | 270 | 276 | 33 | 15 | 11.7 | DFA2800 |
| 300 | 290 | 296 | 33 | 15 | 11.7 | DFA3000 |
| 350 | 338 | 344 | 35 | 8.5 | 13.25 | DFA3500 |
| 400 | 388 | 394 | 35 | 8.5 | 13.25 | DFA4000 |
| 450 | 438 | 444 | 35 | 8.5 | 13.25 | DFA4500 |
| 500 | 488 | 494 | 35 | 8.5 | 13.25 | DFA5000 |
| 560 | 548 | 554 | 35 | 8.5 | 13.25 | DFA5600 |
| 600 | 588 | 594 | 35 | 8.5 | 13.25 | DFA6000 |
| 650 | 638 | 644 | 35 | 8.5 | 13.25 | DFA6500 |
| 700 | 688 | 694 | 35 | 8.5 | 13.25 | DFA7000 |
| 800 | 788 | 794 | 35 | 8.5 | 13.25 | DFA8000 |
| 1000 | 988 | 994 | 35 | 8.5 | 13.25 | DFA10000 |
