GR

Semi-rigid couplings




GR semi-rigid couplings are used to transfer, with the highest precision, rotary movement between two non-aligned shafts.
- Excellent compensation of misalignments without free play.
- Dampening of vibrations and shocks. 

• Terminals made of stainless steel AISI 303, available models (see section "Accessories"):

- cylindrical solid CL  - cylindrical female CF 
cylindrical male CM           - 2 piece cylindrical male CMB

 

Photogallery

SEMI-RIGID COUPLINGS <GR>


* for the GR model the length of the flexibel shaft is 10mm (fixed)

 

DIMENSION TABLE
VERSION FLEXIBLE SHAFT
   Ø A
GR6 6
GR8 8
 GR10 10
 GR12 12
 GR15 15
 GR20  20 

 


FIXING TERMINALS
made of stainless steel AISI 303, available models:

 = square
 
 
FLEXIBLE SHAFT  EXTERNAL SQUARE TOTAL LENGTH
Ø A Ø B
6 5 30
8 6.5 35
10 8.5 40
12 10 40
15 13 45
20 17.5 45

 

CL = cylindrical solid
 
 
FLEXIBLE SHAFT EXTERNAL DIAMETER TOTAL LENGTH AVAILABLE LENGTH
Ø A Ø B D
6 10 28 12
8 12  38 16 
10 14  44 20 
12 16 48 22 
15 20  50 25 
20 25  57 30 

 

CF = cylindrical female
 
FLEXIBLE SHAFT EXTERNAL DIAMETER TOTAL LENGTH BORE DEPTH KEYWAY BORE
Ø A Ø B D E Ø F
6 10 28 10 = 6
8 12  38 15  = 8
10 14  44 15  = 8
12 16 48 16  3 10
15 20  50 16  3 10
20 25  57 20  5 14

 

CM = cylindrical male
 
FLEXIBLE SHAFT EXTERNAL DIAMETER TOTAL LENGHT AVAILABLE LENGTH KEYWAY MALE DIAMETER
Ø A Ø B D E Ø F
6 10 28 10 = 6
8 12  38 14  = 8
10 14  44 14  = 8
12 16 48 15 3 10
15 20  50 15  3 10
15 20 50 15 5 14*
20 25  57 20  5 14

* optional

CMB = 2 piece connection bushing
 
 
FLEXIBLE SHAFT EXTERNAL DIAMETER TOTAL LENGHT AVAILABLE LENGTH KEYWAY BORE EXTERNAL BUSHING
Ø A Ø B D E Ø F Ø G
6 10 28 10 = 6 14
8 12  38 14  = 8 22
10 14  44 14  = 8 22
12 16 48 15 3 10 24
15 20  50 15  3 10 24
15 20 50 15 5  14* 32*
20 25  57 20  5 14 32

 * optional

 

2 pieces connection bushings with screws to couple gearboxes and shafts.

Support units (with square flange) with o.ring, and ball-bearings.

• Available shafts Ø6, Ø8, Ø10, Ø14, Ø20.
• On request threaded bores or drillbores for screws.
• They can be used severally on screws, female screws, shafts or can be combined with our flexible shafts, and our position indicators type “OP”.
• Particularly the combination with flexible shafts an position indicators offers a simple and complete solution for handling and display of motion
  • AVAILABLE VERSIONS
    S2 = albero Ø6 S4 = albero Ø8 S5 = albero Ø10
    S6 = albero Ø14 S8 = albero Ø20


     

Flanged supports with extension shaft for coupling with position indicators.

 

AVAILABLE VERSIONS 
S2 FL OP2 S4 FL OP3

 

S5 FL OP3 S5 FL OP7/EP7


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EFFICIENCY TABLE
VERSION TORSION MIN. BENDING RADIUS TORQUE WEIGHT
  (°)  mm  Nm  gr
GR6 80  70 25
GR8 70 90 4.5 50 
GR10 70 130  7.5  80 
GR12 50 160 9 110 
GR15 28 300  12  170 
GR20  18 400

        18.5

270 

 

FLEXIBILITY AND BENDING RADIUS


Flexibility and minimum bending radius are important factors especially if the shaft is exposed to severe bending during its use. 
 It is necessary to make sure that the lowest bending radius applied to the transmission is greater than its minimum radius of curvature. If during use the shaft reaches a bending radius which is below the minimum bending radius, the unit can be crushed, or deformed or excessivley stressed, and thus reduce its strength and / or durability or even cause it to fail. 

Up to this radius it is possible to bend the transmission during operation without damaging or excessive reduction in its lifetime.

BENDING RADIUS




WORKING ANGLE

MISALIGNEMENT




FLEXIBILITY AND BENDING RADIUS
Ø B MBR AR AM
FLEXIBLE SHAFT LENGTH OF FLEXIBLE SHAFT* mm BENDING RADIUS mm WORKING ANGLE (°) MISALIGNEMENT mm
 6 10  70 4.09 0.36
10  10  130  2.20  0.20 
15  10  300  0.95  0.08 
20  10  400  0.72  0.06 
* for the GR model the length of the flexibel shaft is 10mm (fixed)

 

EFFICIENCY TABLE

 

MAX. TORQUE / ANGLE
Ø B T φ
FLEXIBLE SHAFT Ø LENGTH OF FLEXIBLE SHAFT* mm MAX. WORKING TORQUE Nm ROTATION ANGLE (°)
6 10 3.0 0.79
10  10  7.5  0.74 
15  10  12.5  0.30 
20  10  18.5  0.17 

 

MAX. TORQUE ANGLE with discording winding
Ø B T φ
FLEXIBLE SHAFT Ø LENGTH OF FLEXIBLE SHAFT* mm MAX. WORKING TORQUE Nm ROTATION ANGLE (°)
with discording winding
6 10 3.0 0.79
10  10  7.5  0.74 
15  10  12.5  0.30 
20  10  18.5  0.17 
* for the GR model the length of the flexibel shaft is 10mm (fixed)