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Huco-Lok

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Bore Adaptors in Metal and Glass-Fibre

Bore for optimum fastening, install Huco-Lok bore adaptors as shown above.
'S' represents screws in set screw hub.
'T' represents tangential screw in clamp hub
'F' shows recommended orientation of flattened shaft in set screw hub.

The tables below contain order codes for adaptors given their own bore size and the bore size they are intended to fit inside.

NOTE: The glass-fibre adaptors in the 2nd table are electrically isolating and provide electrical isolation between shafts in all-metal couplers e.g. Flex-M, Flex-B

Dimensions and Order Codes *METALLIC ADAPTORS*
Catalogue Ref (1) ěD
-0.013/ -0.050
L To Fit Bores: Minor Diameter B +0.03/ -0
Code Size 2 3 3.048 3.175 4 4.763 5 6 6.35 7 7.938 8 9 9.525 10 11 12 12.7 14 15 15.875 16 18 19 19.05 20 22 22.225 24 25 25.4
   mm mm   mm                                                              
251 5 4.3 20 5 251.11 251.14 251.15 251.16 251.18 - - - - - - - - - - - - - - - - - - - - - - - - - -
253 6.35 6.6 24 6.35 253.11 253.14 253.15 253.16 253.18 253.19 253.20 - - - - - - - - - - - - - - - - - - - - - - - -
254 8 5.8 28 8 - 254.14 254.15 254.16 254.18 254.19 254.20 254.22 - - - - - - - - - - - - - - - - - - - - - - -
255 8 8.1 28 8 - 255.14 255.15 255.16 255.18 255.19 255.20 255.22 - - - - - - - - - - - - - - - - - - - - - - -
257 10 8.1 32 10 - - - - 257.18 257.19 257.20 257.22 257.24 257.25 257.27 257.28 - - - - - - - - - - - - - - - - - - -
259 12.7 10.7 36 12.7 - - - - - - 259.20 259.22 259.24 259.25 259.27 259.28 259.30 259.31 259.32 - - - - - - - - - - - - - - - -
260 16 13.2 42 16 - - - - - - - 260.22 260.24 260.25 260.27 260.28 260.30 260.31 260.32 260.33 260.35 260.36 260.38 - - - - - - - - - - - -
261 20 20 48 20 - - - - - - - - - - 261.27 261.28 261.30 261.31 261.32 261.33 261.35 261.36 261.38 261.40 261.41 261.42 261.45 - - - - - - - -
262 25.4 20 53 25.4 - - - - - - - - - - - - - 262.31 262.32 262.33 262.35 262.36 262.38 262.40 262.41 262.42 262.45 262.46 262.47 262.48 262.49 262.50 - - -
263 28 25 54 28 - - - - - - - - - - - - - - - - 263.35 263.36 263.38 263.40 263.41 263.42 263.45 263.46 263.47 263.48 263.49 263.50 263.51 263.52 263.53
Table Notes:
  1. Refs. 251 to 255 inclusive are brass. All others are aluminium alloy
    Short adaptor 254 is used with couplings as indicated in the standard bore tables. Use 255 for all other 8mm bores
Dimensions and Order Codes *GLASS-FIBRE ADAPTORS*
Catalogue Ref (1) ěD L To Fit Bores: Minor Diameter B +0.03/ -0
Code Size 2 3 3.048 3.175 4 4.763 5 6 6.35 7 7.938 8 9 9.525 10 11 12 12.7 14 15 15.875 16 18 19 19.05 20 22 22.225 24 25 25.4
   mm mm   mm                                                              
251G 5 4.3 20 5 251G11 251G14 251G15 251G16 251G18 - - - - - - - - - - - - - - - - - - - - - - - - - -
253G 6.35 6.6 24 6.35 253G11 253G14 253G15 253G16 253G18 253G19 253G20 - - - - - - - - - - - - - - - - - - - - - - - -
254G 8 5.8 28 8 - 254G14 254G15 254G16 254G18 254G19 254G20 254G22 - - - - - - - - - - - - - - - - - - - - - - -
255G 8 8.1 28 8 - 255G14 255G15 255G16 255G18 255G19 255G20 255G22 - - - - - - - - - - - - - - - - - - - - - - -
257G 10 8.1 32 10 - - - - 257G18 257G19 257G20 257G22 257G24 257G25 257G27 257G28 - - - - - - - - - - - - - - - - - - -
259G 12.7 10.7 36 12.7 - - - - - - 259G20 259G22 259G24 259G25 259G27 259G28 259G30 259G31 259G32 - - - - - - - - - - - - - - - -
260G 16 13.2 42 16 - - - - - - - 260G22 260G24 260G25 260G27 260G28 260G30 260G31 260G32 260G33 260G35 260G36 260G38 - - - - - - - - - - - -
261G 20 20 48 20 - - - - - - - - - - 261G27 261G28 261G30 261G31 261G32 261G33 261G35 261G36 261G38 261G40 261G41 261G42 261G45 - - - - - - - -
262G 25.4 20 53 25.4 - - - - - - - - - - - - - 262G31 262G32 262G33 262G35 262G36 262G38 262G40 262G41 262G42 262G45 262G46 262G47 262G48 262G49 262G50 - - -
263G 28 25 54 28 - - - - - - - - - - - - - - - - 263G35 263G36 263G38 263G40 263G41 263G42 263G45 263G46 263G47 263G48 263G49 263G50 263G51 263G52 263G53
Table Notes:
  1. Short adaptor 254 is used with couplings as indicated in the standard bore tables. Use 255 for all other 8mm bores