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Universal/ Lateral Offset Couplings with Set Screw Style Fixings

Dimensions and Order Codes
Coupling Size Coupling Ref ØD L L1 (1) L2 (2) ØB1, ØB2 max Fasteners Moment of inertia (4) Mass (4)
Screw Torque (3) Wrench
     mm mm mm mm mm   Nm mm kgm2 x 10-8 kg x 10-3
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18 201.18 18 14.2 4.6 5.1 5 M3 0.94 1.5 20 7
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18 203.18 18 19.1 7 5.1 6.35 M3 0.94 1.5 20 7
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27 201.27 28 19.1 6.1 6.9 8 M3 0.94 1.5 91 16
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27 203.27 28 25.4 9.3 6.9 10 M3 0.94 1.5 91 16
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34 201.34 33.7 25.2 8.1 8.9 10 M4 2.27 2 165 17
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34 203.34 33.7 30.7 10.9 8.9 12.7 M4 2.27 2 165 17
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41 201.41 41.4 28.4 8.6 11.2 12.7 M4 2.27 2 476 30
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41 203.41 41.4 38.1 13.5 11.2 16 M5 4.62 2.5 476 30
Table Notes:
  1. Length of supported thro' bore. Shafts must not penetrate beyond L1 when in operation.
  2. Nominal distance between shafts inserted into L1.
  3. Maximum recommended tightening torque.
  4. Values apply with max bores.

*NOTE*

Coupling Ref. 221
By specifying ref.221 (not listed in tables, see diagram below) you can combine the bores coded for ref. 201 with those coded for ref. 203. e.g. 221.27.2432 specifies Size 27 with Ø6.35x10 bores.

Materials & Finishes

Hub sizes 18 & 27:
Brass BS 2874 CZ121. .
Hub sizes 34 & 41:
Al. Alloy 2014 T6. Iridite NCP finish.
Fasteners:
Alloy Steel, black oiled.
Clamp rings (sizes 18 & 27):
Al. Alloy 2014 T6. Iridite NCP finish.
Torque rings, all sizes:
Acetal (black).

Temperature Range
-20°C to +60°C

Performance
Coupling Size Peak torque (5) Max compensation @ 3000r.p.m. Torsional Axial Static break torque
Angular (6) Radial (6) Rate (7) Stiffness (7) Max loading ±N (8) Stiffness (8)
   Nm deg mm deg/Nm Nm/rad   N/mm Nm
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18 0.3 2 0.2 - 25 19 155 0.9
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18 0.3 2 0.2 - 25 19 155 0.9
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27 1.7 2 0.2 - 92 31 350 5
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27 1.7 2 0.2 - 92 31 350 5
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34 2.5 2 0.25 - 146 34 300 7.5
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34 2.5 2 0.25 - 146 34 300 7.5
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41 3.5 2 0.25 - 299 39 250 10.5
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41 3.5 2 0.25 - 299 39 250 10.5
Table Notes:
  1. Peak torque. Select a size where Peak Torque exceeds the application torque x service factor.
  2. Couplers can provide up to 1mm radial and 10° angular compensation (5° for ref. 207) when required. Observe given values for maximum backlash-free life. Electrical isolation between shafts >3kV for all models when offset is less than or equal to 5°.
  3. Values apply at 50% peak torque with no misalignment, measured shaft-to-shaft with largest standard bores.
  4. Momentary values