» Overview flexible shafts
 
 

Power drive core
 
 
Kraftübertragungswelle
 
 
Construction
4 to 8 high tensile wires per layer.

Applications
Power transmission in machinery, power seat movement, power tools, concrete vibrators, etc.

Features
Very flexible, high rpm operation, shock absorption, quiet and vibration-free operation.
 
 
Downloads & Contact
» Technical description, US Version (pdf, 131 kB)
» Technical description (pdf, 202 kB)
» Contact
 
 
 



 
 

 
 
Type shaft Core dia-
meter		 Num-
ber of layers		 Min. oper-
ating radius		 Max. RPM Degrees torsional
deflection		 Torsional
breaking
point in
winding
direction
straight shaft		 Maximum dynamic torque
capacity in winding direction		 Approx. weight
radius of curvature
Wind-
ing		 Unwind-
ing		 25" 20" 15" 12" 10" 8" 6" 4"
Inch inch inch per foot
per pound inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
inch		 Pound
per 100 ft.
130-21 1/8 4 3 30000 65° 85° 12 4.1 3.7 3.4 3.15 3.0 2.85 2.10 1.55 3.0
150-21 5/32 4 4 30000 38° 50° 22 5.8 5.1 4.6 4.30 4.15 3.60 2.80 1.25 4.3
187-21 3/16 5 4 25000 23° 30° 50 8.2 7.5 7.5 6.4 6.10 5.8 4.4 1.8 7.0
250-25 1/4 5 5 25000 10° 13° 80 16.5 14.0 13.0 12.5 11.5 10.5 9.5 - 12.3
310-31 5/16 6 5 18000 7° 9° 170 30 28 26.5 23 21.5 18.5 15.0 - 22
375-37 3/8 7 7 15000 1° 1.3° 390 45 41 36 33.5 28 22 - - 28.4
437-37 7/16 7 9 12000 0.8° 1.0° 480 75 67 55 50 40 34.5 - - 38
500-43 1/2 8 10 12000 0.5° 0.7° 620 105 95 84 74.5 65 - - - 50
625-48 5/8 9 12 7500 0.2° 0.3° 950 165 136 100 65 - - - - 78
750-53 3/4 10 15 5000 0.14° 0.18 1350 217 150 105 - - - - - 115
Metric mm   mm   per 1 m
at 1 cm kg		 cm kg cm kg cm kg cm kg cm kg cm kg cm kg cm kg cm kg cm kg kg per m
3-21 3 4 80 30000 210° 285° 10 3.9 3.7 3.2 3.0 2.8 2.7 2.1 1.4 0.045
4-21 4 4 100 30000 130° 180° 25 5.8 5.1 4.6 4.3 4.1 3.6 2.8 1.2 0.080
6-25 6 5 120 25000 40° 55° 90 15.5 14.0 13.0 12.0 11.2 10.1 9.5 4.2 0.230
7-31 7 6 140 20000 25° 40° 180 24.0 21.0 20.0 15.5 14.5 13 11.5 - 0.350
10-37 10 7 170 15000 4° 6° 440 47.0 40 36 33 27 23 - - 0.460
12-43 12 8 240 12000 2° 3° 680 100 86 77 70 54 - - - 0.660
15-48 15 9 300 8000 1.5° 2° 950 160 133 100 64 - - - - 1.050
20-53 20 10 380 5000 0.7° 1° 1700 215 150 104 - - - - - 1.850
 
 
Explanations:
X Last number:
1 for operation in clockwise (right-hand) direction
2 for operation in counter-clockwise (left-hand) direction
1) Min. bend radius: The bend radius cannot be smaller than this value.
2) Torsional deflection: Torsional deflection angle over 1 m shaft with torque of 10 Ncm.
3) Breaking torque: At this load the shaft will break.
4) Max. torque: Values applicable for straight shaft at speeds of 20% of maximum rated speed.