FAP-M
Self-supporting flexible shaft
Innovative and simple, the new self-supporting flexible shaft allows easy installation wihtout fixing the protective cover.
● Reinforced steel cover
● Universally applicable, it is ideal for new projects and upgrades
● High performance and rotation
● Highly smooth rotation on ball bearings
● Misalignement compensation and vibration damping
● Maximum accuracy in torque transmission
● High wear resitance
Photogallery
CYLINDRICAL TERMINAL «C» FLANGED TERMINAL «F»
1. Nr. 3 screws at 120°
| DIMENSION TABLE | |||||||
| VERSION | FLEXIBLE SHAFT | ESTERNAL COVER | TERMINAL COVER | EFFECTIVE (L) | INNER TERMINAL | BORE DEPTH | KEYWAY |
| Ø A | Ø B | Ø C | D | Ø E | F | G | |
| FAP6M | 6 | 14 | 12 | 16 | 6 | 12 | = |
| FAP8M | 8 | 17 | 15 | 22 | 8 | 20 | = |
| FAP12M | 12 | 25 | 17 | 26 | 10 | 26 | 3 |
| FAP15M | 15 | 30 | 20 | 26 | 10 | 26 | 3 |
| FAP20M | 20 | 35 | 25 | 35 | 14 | 32 | 5 |
| The data refers to length L=1000mm |
| CYLINDRICAL TERMINAL «C» | ||
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| DIMENSION TABLE | ||
| FLEXIBLE SHAFT | EXTERNAL COVER | COVER TERMINAL |
| Ø A | Ø B | C |
| 6 | 22 | 18.5 |
| 8 | 28 | 24 |
| 12 | 35 | 35 |
| 15 | 36 | 37 |
| 20 | 42 | 41 |
| FLANGED TERMINAL «F» | ||||||
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| DIMENSION TABLE | ||||||
| FLEXIBLE SHAFT | ESTERNAL COVER | COVER TERMINAL (L) | FLANGE | FLANGE WIDTH | FIXING BORES | FIXING SCREWS |
| Ø A | Ø B | C | Ø D | E | Ø F | Ø G |
| 6 | 22 | 18.5 | 38 | 6 | 30 | 3.2 |
| 8 | 28 | 24 | 45 | 8 | 36 | 4.2 |
| 12 | 35 | 35 | 55 | 9 | 45 | 4.2 |
| 15 | 36 | 37 | 60 | 9 | 48 | 5.2 |
| 20 | 42 | 41 | 65 | 11 | 52 | 5.2 |
Flanged supports with extension shaft for coupling with position indicators.
➜ for more complete information, see Flanged supports
Richiedi l'accesso
| EFFICIENCY TABLE | ||||
| VERSION | TORSION | MIN. BENDING RADIUS | TORQUE | WEIGHT |
| (°) | mm | Nm | gr | |
| FAP6M | 80 | 70 | 3 | 800 |
| FAP8M | 70 | 90 | 4.5 | 1100 |
| FAP12M | 50 | 160 | 9 | 1600 |
| FAP15M | 28 | 300 | 12 | 2100 |
| FAP20M | 18 | 400 | 18.5 | 3300 |
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The data refers to length L=1000mm |
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MECHANICAL CHARACTERIZATION OF FLEXIBLE SHAFTS |
Flexible shafts are mechanical elements which are subject to torque and undergo a rotational elastic deformation. Considering a single flexible shaft, the equal and opposite torques which are applied at each extremity cause a relative rotation of the various sections which is proportional to the distance between the sections. The relation between Applied Torque T [Nm] and Twist Angle of the extremities φ [°] is a function of three parameters as follows:
● Torsional Rigidity k [103Nm/°] which depends on the section diameter and its construction characteristics
● Length of the shaft L [mm]
● Rotation Direction r (dimensionless parameter which characterizes the asymmetric behavior of the shaft)
Parameter r is equal to 1 when the shaft is loaded according to the winding direction of the spiral; when loaded in the opposite direction, r < 1 as indicated in the following table:
| PARAMETERS OF FLEXIBLE SHAFT | ||||
| Diameter Ø |
k |
r |
Tmax |
φ [°] (L=1000mm, Tmax) |
| 4 | 17 | 0.55 | 1.1 | 64.71 |
| 5 | 26 | 0.55 | 1.8 |
69.23 |
| 6 | 38 | 0.55 | 3.0 | 78.95 |
| 8 | 67 | 0.55 | 4.5 | 67.16 |
| 10 | 101 | 0.55 | 7.5 | 74.26 |
| 12 | 180 | 0.65 | 9.0 | 50.00 |
| 15 | 405 | 0.80 | 12.5 | 30.86 |
| 20 | 1050 | 0.85 | 18.5 | 17.62 |
| BENDING EFFICIENCY |
The above shows a qualitative-quantitative curve of the efficiency of the flexible shaft as a function of the bending radius.
For configurations which are almost in a straight line, the efficiency is equal to the maximum value 0.9.
The efficiency is nearly constant for high values of the bending radius and decreases rapidly down to 0.2 as the minimum bending radius is approached.
1. Efficiency
2. Bending radius/R min.
| DIAGRAM SHOWING TWIST ANGLE VS TORQUE FOR SHAFTS WITH A TOTAL LENGTH L=1000mm |
| FOR DIAMETERS FROM Ø4 TO Ø10 |
1. Twist angle φ [°]
2. Torque (Nm)
| FOR DIAMETERS FROM Ø12 TO Ø20 |
1. Twist angle φ [°]
2. Torque (Nm)
| GENERAL EFFICIENCY TABLE |
1. Power P (kw)
2. Rotation per minute (rpm)
| - To identify the most suitable flexible shaft for your requirements, refer to the values in the table. If the real loads and efficiency are very close to the table values, contact the technical department. |
| - To choose the most suitable flexibel shaft, we advise to consult the figures, tables, and the technical data shown in the “General Information” of this site. |
| - All tables show linear measurements expressed in <mm>, unless otherwise specified. All forces, efficiency and the loads are expressed in <N or Nm> (10 N ≅ 1 kg or 10Nm ≅ 1Kgm) unless otherwise specified. |
