Products Power Transmission Products

  • Roller Chain Coupling

Main Unit with Finished Bore (Fit Bore Series)

117 types of finished bore items are available. Quick Delivery upon request.

The standard tolerance of bore machining is based on H7 and accommodates the tolerances of press fitting too.

RoHS compliant

Body with Finished Bore (Fit Bore Series)

1.Machining Specifications

Shaft Bore
Please select the required bore diameter and tolerance from table 3 and table 4 respectively.
Keyway
Please select the required dimension and tolerance from table 4.
Tap Hole
Please see the set screw positional relationships list in the catalog.
  • 2 locations on one side of the hub, with set screws
  • Different machining details can be set on both sides separately

Acceptable Range

Specifications Shaft Bore Tolerance Keyway Tolerance
Standard H7 Js9
Semi-standard R7, P7, N7
M7, Js7, G7
P9, F7, E9

2.Reference Number System

Reference Number System

3.Applicable Bore Diameter List

Model No. Bore Dia. (mm)
14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55 60 65
CR3812FB
CR4012FB
CR4014FB
CR4016FB
CR5014FB
CR5016FB
CR5018FB
CR6018FB
CR6022FB
CR8018FB
CR8022FB
New JIS Key Width (mm) 5 5 5 5 6 6 6 6 8 8 8 8 10 10 10 12 12 14 14 14 16 18 18
Old JIS Key Width (mm) 5 5 5 5 5 5 5 7 7 7 7 7 10 10 10 10 12 12 12 12 15 15 18

Please fill in the boxes with the bore tolerance, bore diameter, and keyway tolerance, in that order.

4.Shaft Tolerance/Keyway Tolerance Code

Standard &
Semi-Standard
Bore Tolerance Keyway Tolerance
Standard Semi-Standard Standard Semi-Standard
Code H R P N M J G J P F E
Tolerance H7 R7 P7 N7 M7 Js7 G7 Js9 P9 F7 E9