One-Piece Industry Standard Clamping Coupling with or without Keyway

123-Series : Keyless Locking Assembly


Medium-High Torque. Economical - Quick Installation - Compact Size. Available in metric sizes - see chart below.


Bore Sizes: 3/4" through 8"
Available in:
Steel Finish


Download Catalog Page >> PDF Format


Download KLA Assembly Instructions



One-Piece Industry Standard Clamping Coupling with or without Keyway

Tolerances, surface finish
A good machined surface finish is sufficient.
Maximum allowable surface finish:
  Rt max 16 µm (Ra 3 µm - Rz 13 µm)
Maximum permissible tolerances:
  h8 for shaft (Ød)
  H8 for hub (ØD )
For exact tolerance values and DM hub calculation - technical data.


INCH ID ID OD   Length   Length incl. Cap Screw MS Screw Seating Torque (max.) Axial Load (max.) Shaft Pressure Hub Pressure Weight (approx.)
  d d D L1 L2 L3 B Size Torque Mt Fax Ps Ph  
Climax Part # inch inch inch inch inch inch inch  n x typ LB-ft Lb-ft Lbf psi psi Lb
C123E-075   3/4  0.7500 1.850 0.669 0.866 1.102 1.339 5 x M6 10 262 8442 44612 18082 1
C123E-087   7/8  0.8750 1.850 0.669 0.866 1.102 1.339 5 x M6 10 305 8442 38239 18082 1
C123E-100 1       1.0000 1.969 0.669 0.866 1.102 1.339 6 x M6 10 418 10131 40151 20397 1
C123E-112 1  1/8  1.1250 2.165 0.669 0.866 1.102 1.339 6 x M6 10 471 10131 35690 18543 1
C123E-118 1  3/16 1.1875 2.165 0.669 0.866 1.102 1.339 6 x M6 10 496 10131 33812 18543 1
C123E-125 1  1/4  1.2500 2.362 0.669 0.866 1.102 1.339 8 x M6 10 696 13507 42828 22663 1
C123E-137 1  3/8  1.3750 2.362 0.669 0.866 1.102 1.339 8 x M6 10 767 13507 38935 22663 1
C123E-143 1  7/16 1.4375 2.559 0.669 0.866 1.102 1.339 8 x M6 10 801 13507 37242 20920 1
C123E-150 1  1/2  1.5000 2.559 0.669 0.866 1.102 1.339 8 x M6 10 836 13507 35690 20920 1
C123E-162 1 5/8 1.6250 2.953 0.787 0.984 1.299 1.614 7 x M8 26 1518 22637 46929 25827 2
C123E-168 1 11/16 1.6875 2.953 0.787 0.984 1.299 1.614 7 x M8 26 1577 22637 45191 25827 2
C123E-175 1 3/4 1.7500 2.953 0.787 0.984 1.299 1.614 7 x M8 26 1635 22637 43577 25827 2
C123E-187 1 7/8 1.8750 3.150 0.787 0.984 1.299 1.614 7 x M8 26 1752 22637 40672 24213 2
C123E-193 1 15/16 1.9375 3.150 0.787 0.984 1.299 1.614 7 x M8 26 1809 22637 39360 24213 2
C123E-200 2 2.0000 3.150 0.787 0.984 1.299 1.614 7 x M8 26 1868 22637 38130 24213 2
C123E-212 2 1/8 2.1250 3.346 0.787 0.984 1.299 1.614 8 x M8 26 2269 25871 41014 26044 2
C123E-218 2  3/16 2.1875 3.346 0.787 0.984 1.299 1.614 8 x M8 26 2335 25871 39842 26044 2
C123E-225 2 1/4 2.2500 3.543 0.787 0.984 1.299 1.614 8 x M8 26 2401 25871 38735 24597 2
C123E-237 2 3/8 2.3750 3.543 0.787 0.984 1.299 1.614 8 x M8 26 2927 25871 36697 24897 2
C123E-243 2  7/16 2.4375 3.740 0.787 0.984 1.299 1.614 9 x M8 26 2927 29104 40225 26215 2
C123E-250 2 1/2 2.5000 3.740 0.787 0.984 1.299 1.614 9 x M8 26 3002 29104 39219 26215 2
C123E-256 2  9/16 2.5625 3.740 0.787 0.984 1.299 1.614 9 x M8 26 3076 29104 38263 26215 2
C123E-268 2 11/16 2.6875 4.331 0.945 1.181 1.575 1.969 8 x M10 52 4499 40583 42393 26308 4
C123E-275 2 3/4 2.7500 4.331 0.945 1.181 1.575 1.969 8 x M10 52 4604 40583 41430 26308 4
C123E-287 2 7/8 2.8750 4.528 0.945 1.181 1.575 1.969 8 x M10 52 4814 40583 39628 25164 4
C123E-293 2 15/16 2.9375 4.528 0.945 1.181 1.575 1.969 8 x M10 52 4918 40583 38785 25164 4
C123E-300 3 3.0000 4.724 0.945 1.181 1.575 1.969 8 x M10 52 5023 40583 37977 24115 4
C123E-325 3 1/4 3.2500 4.921 0.945 1.181 1.575 1.969 9 x M10 52 6122 45656 39438 26045 4
C123E-337 3 3/8 3.3750 4.921 0.945 1.181 1.575 1.969 9 x M10 52 6356 45656 37977 26045 4
C123E-343 3  7/16 3.4375 5.118 0.945 1.181 1.575 1.969 9 x M10 52 6474 45656 37287 25043 5
C123E-350 3 1/2 3.5000 5.118 0.945 1.181 1.575 1.969 9 x M10 52 6592 45656 36621 25043 5
C123E-375 3 3/4 3.7500 5.315 0.945 1.181 1.575 1.969 10 x M10 52 7847 50728 37977 26795 5
C123E-393 3 15/16 3.9375 5.709 1.024 1.260 1.732 2.205 8 x M12 92 9810 60398 39750 27417 6
C123E-400 4 4.0000 5.709 1.024 1.260 1.732 2.205 8 x M12 92 9966 60398 39129 27417 6
METRIC ID ID OD   Length   Length incl. Cap Screw MS Screw Seating Torque (max.) Axial Load (max.) Shaft Pressure Hub Pressure Weight (approx.)
  d x D d D L1 L2 L3 B Size Torque Mt Fax Ps Ph  
Climax Part # mm inch inch inch inch inch inch  n x typ LB-ft Lb-ft Lbf psi psi Lb
C123M-20x47 20 x 47 0.787 1.850 0.669 0.866 1.102 1.339 5 x M6 10 280 8543 42786 18130 0.7
C123M-22x47 22 x 47 0.866 1.850 0.669 0.866 1.102 1.339 5 x M6 10 13 8543 39160 18130 0.7
C123M-24x50 24 x 50 0.945 1.969 0.669 0.866 1.102 1.339 5 x M6 10 332 8543 35534 17405 0.7
C123M-25x50 25 x 50 0.984 1.969 0.669 0.866 1.102 1.339 6 x M6 10 420 10341 41336 20305 0.7
C123M-28x55 28 x 55 1.102 2.165 0.669 0.866 1.102 1.339 6 x M6 10 465 10341 36985 18855 0.9
C123M-30x55 30 x 55 1.181 2.165 0.669 0.866 1.102 1.339 6 x M6 10 487 10341 34084 18855 0.9
C123M-32x60 32 x 60 1.260 2.362 0.669 0.866 1.102 1.339 8 x M6 10 715 13489 42786 22481 0.9
C123M-35x60 35 x 60 1.378 2.362 0.669 0.866 1.102 1.339 8 x M6 10 782 13489 39160 22481 0.9
C123M-38x65 38 x 65 1.496 2.559 0.669 0.866 1.102 1.339 8 x M6 10 848 13489 36259 21030 0.9
C123M-40x65 40 x 65 1.575 2.559 0.669 0.866 1.102 1.339 8 x M6 10 892 13489 34084 21030 0.9
C123M-42x75 42 x 75 1.654 2.953 0.787 0.984 1.299 1.614 7 x M8 26 1512 22031 43511 24656 2
C123M-45x75 45 x 75 1.772 2.953 0.787 0.984 1.299 1.614 7 x M8 26 1623 22031 42061 24656 2
C123M-48x80 48 x 80 1.890 3.150 0.787 0.984 1.299 1.614 7 x M8 26 1733 22031 39160 23206 2
C123M-50x80 50 x 80 1.969 3.150 0.787 0.984 1.299 1.614 7 x M8 26 1807 22031 37710 23206 2
C123M-55x85 55 x 85 2.165 3.346 0.787 0.984 1.299 1.614 8 x M8 26 2272 25179 39160 25382 2
C123M-60x90 60 x 90 2.362 3.543 0.787 0.984 1.299 1.614 8 x M8 26 2478 25179 35534 23931 2
C123M-65x95 65 x 95 2.559 3.740 0.787 0.984 1.299 1.614 9 x M8 26 3017 28326 36985 25382 2
C123M-70x110 70 x 110 2.756 4.331 0.945 1.181 1.575 1.969 8 x M10 52 4647 40241 40611 26107 4
C123M-75x115 75 x 115 2.953 4.528 0.945 1.181 1.575 1.969 8 x M10 52 4942 40241 37710 24656 4
C123M-80x120 80 x 120 3.150 4.724 0.945 1.181 1.575 1.969 8 x M10 52 5274 40241 36259 24656 4
C123M-85x125 85 x 125 3.346 4.921 0.945 1.181 1.575 1.969 9 x M10 52 6269 44962 37710 26107 4
C123M-90x130 90 x 130 3.543 5.118 0.945 1.181 1.575 1.969 9 x M10 52 6712 44962 36259 24656 5
C123M-95x135 95 x 135 3.740 5.315 0.945 1.181 1.575 1.969 10 x M10 52 7818 50357 37710 26107 5

* It is possible to reduce the screws tightening torque down to 60% of the values indicated in the above table; as a result the Mt, Fax, Ps, Ph are reduced proportionally.