16
Common
5. Coupling with Other Machines
5-4 When Using Shrink Disk (Option)
5-4-1 Installing the Shrink Disk
• With grease applied to the squeezing surface (before tightening of the boss), the shrink disk is shipped with the reducer, once you
receive it, you can assemble it immediately.
The inserts padded between plates can be removed by loosening all the bolts.
If you want to remove and reuse the shrink disk used up to now, first disassemble and clean it, and apply molybdenum disulfide
grease to the sliding cone, the tightening bolt, and the surface coming in contact with the bolt head.
(1) Completely degrease the boss holes and all the shafts coming in contact with them.
(2) Slide the shrink disk onto the hollow shaft. Do not tighten any tightening bolt until the driven shaft is inserted into the hollow
shaft.
(3) Slide the driven shaft or reducer to insert the driven shaft into the hollow shaft.
(4) When tightening the bolts, take care to place the surfaces of both plates in parallel. In this case, a wrench with a short grip is
suitable for work.
(5) Make sure that the shrink disk has been placed properly. Then, use a wrench with proper length to start tightening the tightening
bolt. Tighten each bolt clockwise (not diagonally) one by one while keeping the two plates in parallel evenly. It is recommended
that in this case, each bolt be tightened by 30 degrees at each tightening step.
(6) After the shrink disk has been tightened, be sure to check the torque by using torque wrench. The specified torque is described
on the shrink disk nameplate.
(7) Last of all, examine whether the two plates are in parallel.
Note: Operate a shrink disk after correctly installed by a process shown above.
No oil lubrication is applied between a hollow shaft and a driven shaft.
It may cause a scratch or a galling to shafts If a shrink disc is rotated without properly installed.
Driven shaft
(driven machine axis)
Tightening bolt
10.9 (equivalent to 10T)
Plate
Sliding cone
Hollow shaft
(reducer output shaft)
Completely degrease the hollow
shaft inside surface and the
driven shaft outside surface.
Fig.20 Shrink Disk Construction
5-4-2 Removing the Shrink Disk
• To remove the shrink disk, perform the steps of the installation procedure in the reverse order.
• Loosen the bolts little by little in order so that both plates will not slant on the sliding cone.
• Never remove any bolt unless the two plates are in parallel. If this is disobeyed, both plates may pop out suddenly from the sliding
cone, resulting in a personal injury. For this reason, loosen all the bolts slightly, and insert a wedge between the plates so that they
become parallel.
