FK Guiding Element
Descriptions
The Profile FK guide ring is open and therefore lends itself to easy assembly. It is extraordinarily wear-resistant and suitable for piston guiding. The use of this guide ring
simplifies the design of pistons.
Features
• Minimal play due to extremely small
manufacturing tolerances of the guiding
elements.
• Vibration absorption effect.
• Extreme wear resistance.
• Improved sliding properties due to surface structure.
• Easy snap assembly on a single-part
piston.
• Significantly higher permissible loading
pressure compared with other guidance
tape materials.
• Dimensions according to DIN 10766.
• Also available as bulk material.
• Any desired nominal diameter available
due to use of machining technique.
• Installation in closed and undercut
housings.
Range of application
Guiding element for pistons and piston rods in hydraulic cylinders.
Operating temperature
| FKS525Q5038 FK Q5029 | -50 °C to +130 °C -50 °C to +120 °C |
| in HFA, HFB and HFC fluids | -30 °C to +80 °C |
| in water max. | + 100 °C |
Pressure resistance acc. to DIN 53454
| FKS525Q5038 FK Q5029 | 340 N/mm² 270 N/mm² |
Water absorption acc. to DIN 53495
| FKS525Q5038 FK Q5029 | < 0.1 % 1 % to 2 % |
| Sliding speed | ≤ 0.5 m/s |
Recommendation for determing the safety factor ν: ν > 3
Compounds
Duroplastic synthetic resins with fabric reinforcement.
Q5029: phenole resin-cotton laminate.
Q5038: phenole resin-acrylic fabric laminate.
Installation
For surface requirements, see chapter „General Installation Guidelines“.
For nonferrous and light metal pistons, please use our F3 guidance tape profile (PTFE
with carbon filler).
The installed rings must have a gap „k“ between their diagonally cut ends:
k = 0.008 x d + 2
The calculated values for „k“ are rounded up to the nearest millimetre or half-millimetre.
The calculation of the permissible radial force is based on the projected area D × L.
Example: permissible radial force FR for a cylinder diameter of D = 80 mm, length L =
15 mm, compound Q5038T and safety factor 4:
Calculation of elongated length
“U“ (piston) = π × (D – S) – k
| D | d | L | D1 |
| 25 | 20 | 5.6 | 24.8 |
| 25 | 20 | 9.7 | 24.8 |
| 28 | 23 | 6.3 | 27.8 |
| 32 | 27 | 5.6 | 31.8 |
| 32 | 27 | 9.7 | 31.8 |
| 35 | 30 | 5.6 | 34.8 |
| 35 | 30 | 9.7 | 34.8 |
| 36 | 31 | 5.6 | 35.8 |
| 40 | 35 | 5.6 | 39.7 |
| 40 | 35 | 9.7 | 39.7 |
| 42 | 37 | 5.6 | 41.7 |
| 45 | 40 | 5.6 | 44.6 |
| 45 | 40 | 9.7 | 44.6 |
| 50 | 45 | 5.6 | 49.6 |
| 50 | 45 | 9.7 | 49.6 |
| 55 | 50 | 5.6 | 54.6 |
| 55 | 50 | 9.7 | 54.6 |
| 60 | 55 | 5.6 | 59.6 |
| 60 | 55 | 9.7 | 59.6 |
| 63 | 58 | 5.6 | 62.6 |
| 63 | 58 | 6.3 | 62.6 |
| 63 | 58 | 9.7 | 62.6 |
| 65 | 60 | 5.6 | 64.5 |
| 65 | 60 | 6.3 | 64.5 |
| 65 | 60 | 9.7 | 64.5 |
| 70 | 65 | 5.6 | 69.5 |
| 70 | 65 | 6.3 | 69.5 |
| 70 | 65 | 9.7 | 69.5 |
| 70 | 65 | 15 | 69.5 |
| 75 | 70 | 5.6 | 74.5 |
| 75 | 70 | 9.7 | 74.5 |
| 75 | 70 | 15 | 74.5 |
| 80 | 75 | 6.3 | 79.5 |
| 80 | 75 | 9.7 | 79.5 |
| 80 | 75 | 15 | 79.5 |
| 80 | 75 | 25 | 79.5 |
| 85 | 80 | 6.3 | 84.5 |
| 85 | 80 | 9.7 | 84.5 |
| 85 | 80 | 15 | 84.5 |
| 90 | 85 | 5.6 | 89.5 |
| 90 | 85 | 9.7 | 89.5 |
| 90 | 85 | 15 | 89.5 |
| 90 | 85 | 25 | 89.5 |
| 95 | 90 | 5.6 | 94.5 |
| 95 | 90 | 9.7 | 94.5 |
| 95 | 90 | 15 | 94.5 |
| 100 | 95 | 5.6 | 99.4 |
| 100 | 95 | 9.7 | 99.4 |
| 100 | 95 | 15 | 99.4 |
| 105 | 100 | 9.7 | 104.4 |
| 105 | 100 | 15 | 104.4 |
| 110 | 105 | 9.7 | 109.4 |
| 110 | 105 | 15 | 109.4 |
| 115 | 110 | 9.7 | 114.4 |
| 115 | 110 | 15 | 114.4 |
| 120 | 115 | 9.7 | 119.4 |
| 120 | 115 | 15 | 119.4 |
| 125 | 120 | 9.7 | 124.4 |
| 125 | 120 | 15 | 124.4 |
| 130 | 125 | 9.7 | 129.4 |
| 130 | 125 | 15 | 129.4 |
| 140 | 135 | 9.7 | 139.4 |
| 140 | 135 | 15 | 139.4 |
| 145 | 140 | 9.7 | 144.3 |
| 145 | 140 | 15 | 144.3 |
| 150 | 145 | 9.7 | 149.3 |
| 150 | 145 | 15 | 149.3 |
| 155 | 150 | 9.7 | 154.3 |
| 155 | 150 | 15 | 154.3 |
| 155 | 150 | 25 | 154.3 |
| 160 | 155 | 9.7 | 159.3 |
| 160 | 155 | 15 | 159.3 |
| 160 | 155 | 20 | 159.3 |
| 165 | 160 | 9.7 | 164.3 |
| 165 | 160 | 15 | 164.3 |
| 165 | 160 | 25 | 164.3 |
| 170 | 165 | 9.7 | 169.3 |
| 170 | 165 | 15 | 169.3 |
| 170 | 165 | 25 | 169.3 |
| 175 | 170 | 9.7 | 174.3 |
| 175 | 170 | 15 | 174.3 |
| 175 | 170 | 25 | 174.3 |
| 180 | 175 | 9.7 | 179.3 |
| 180 | 175 | 15 | 179.3 |
| 180 | 175 | 25 | 179.3 |
| 190 | 185 | 9.7 | 189.3 |
| 190 | 185 | 15 | 189.3 |
| 190 | 185 | 25 | 189.3 |
| 200 | 195 | 9.7 | 199.3 |
| 200 | 195 | 15 | 199.3 |
| 200 | 195 | 25 | 199.3 |
| 205 | 200 | 15 | 204.3 |
| 205 | 200 | 25 | 204.3 |
| 210 | 205 | 15 | 209.3 |
| 210 | 205 | 25 | 209.3 |
| 215 | 210 | 15 | 214.3 |
| 215 | 210 | 25 | 214.3 |
| 220 | 215 | 15 | 219.3 |
| 220 | 215 | 25 | 219.3 |
| 225 | 220 | 15 | 224.3 |
| 225 | 220 | 25 | 224.3 |
| 230 | 225 | 15 | 229.3 |
| 230 | 225 | 25 | 229.3 |
| 240 | 235 | 15 | 239.3 |
| 240 | 235 | 25 | 239.3 |
| 250 | 245 | 15 | 249.3 |
| 250 | 245 | 25 | 249.3 |
| 255 | 250 | 15 | 254.3 |
| 255 | 250 | 25 | 254.3 |
| 260 | 255 | 15 | 259.3 |
| 260 | 255 | 25 | 259.3 |
| 265 | 260 | 15 | 264.3 |
| 265 | 260 | 25 | 264.3 |
| 270 | 265 | 15 | 269.3 |
| 270 | 265 | 25 | 269.3 |
| 275 | 270 | 15 | 274.3 |
| 275 | 270 | 25 | 274.3 |
| 280 | 275 | 15 | 279.2 |
| 280 | 275 | 25 | 279.2 |
| 285 | 280 | 15 | 284.2 |
| 285 | 280 | 25 | 284.2 |
| 290 | 285 | 15 | 289.2 |
| 290 | 285 | 25 | 289.2 |
| 300 | 295 | 15 | 299.2 |
| 300 | 295 | 25 | 299.2 |
| 310 | 305 | 15 | 309 |
| 310 | 305 | 25 | 309 |
| 320 | 315 | 15 | 319 |
| 320 | 315 | 25 | 319 |
| 330 | 325 | 15 | 329 |
| 330 | 325 | 25 | 329 |
| 350 | 345 | 15 | 349 |
| 350 | 345 | 25 | 349 |
| 380 | 375 | 15 | 379 |
| 380 | 375 | 25 | 379 |
| 400 | 395 | 15 | 399 |
| 400 | 395 | 25 | 399 |
| 450 | 445 | 25 | 449 |
| 450 | 445 | 25 | 449 |
| 500 | 495 | 15 | 499 |
| 500 | 495 | 25 | 499 |