Shaft Coupling Bore Additional Modification Service
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Part number specification
Specify the bore diameter within the range of the minimum bore diameter *1 or more and the maximum bore diameter *2 or less of the shaft coupling.
＊1 In principle, the minimum bore diameter is the length of the shaft coupling (dimension L) x 1/3.
＊2 For the maximum bore diameter, refer to the dimension tables on each product page. For bore diameters exceeding 130 mm, please contact our customer service.
Select the modification type. Refer to the Modification Type List on the next page and specify the symbol inside . ※If set screw hole modification (modification types BNS BNW BNT BKS BKW BKT ) is specified, set screws will be supplied.
Processing Types List
Shaft hole tolerance.
Select the bore tolerance and specify the modification symbol.
＊Class 7 is standard. Specify Classes 6 or 8 with dimension tolerance symbols. ＊Please contact our customer service for bore tolerances other than the above.
●Fitting example of the shaft coupling shaft and bore
＊1 ： Not covered by the additional modification service.
For processing types which include keyway processing, select keyway type.
●Parallel keyway（modification types BKN BKS BKW BKT） Specify the modification symbol according to the parallel key standard.
●Taper keyway（modification type BCN） Specify the modification symbol according to the taper key standard.
●BoreD1 D2：Specify within the range of the minimum bore diameter*1or more and the maximum bore diameter*2or less of the shaft coupling. ＊1 In principle, the minimum bore diameter is the length of the shaft coupling (dimension L)×1/3. ＊2 For the maximum bore diameter, refer to the dimension tables on each product page. or bore diameters exceeding 130 mm, please contact our customer service. ●Keyway bt:Keyways will be machined according to the JIS standard. ●Set screw M：Set as shown below according to the bore diameter. x：Dimension x from the end face of the hub to the center of the set screw is 1.5 times the thread diameter as a reference. The size and position of the set screw may differ depending on the type of shaft coupling.
●Bores (all) Inspection by limit plug gauge or cylinder gauge ●Keyways (first item) Keyway width: Inspection by limit key width gauge Keyway depth: Inspection by calipers ●Set screw holes (first item) Set screw diameter: Inspection by limit gauge for screw