HE18E-001A

Instruction Manual
Insert Bearing Units(How to remove Insert Bearing Units)

Table of ContentsPage
1. Removal method for set-screw locking type ....................................................................................................................... 1
2. Removal method for eccentric locking collar type .............................................................................................................. 1
3. Removal method for adapter locking type .......................................................................................................................... 2

Insert Bearing Units (How to remove Insert Bearing Units)

1. Removal method for set-screw locking type(1)

Loosen the set screws.
When loosening the set screws, if the set screw tip protrudes from the inner ring inside
diameter surface, the shaft will be damaged when extracting the unit; therefore, it is necessary
to loosen the set screws sufficiently.

(2)

Remove the mounting bolts.

(3)

Extract the unit.
* If the inner ring is stuck to the shaft:▪ Extract the unit with an extraction tool (pulley puller, etc.) after applying lubrication
grease.
▪ It is recommended to extract the unit using an extraction tool with a tie rod, etc. throughthe bearing inner ring so that the extraction force is not transferred to the unit throughthe rolling element. (Refer to Section 1-1.)▪ When extracting the unit through the rolling element (by hooking the jaw of theextraction tool over the housing, for example) (Fig. 1 -2), since flaws will be generated
on the bearing rolling surfaces, which are likely to cause abnormal sound or damage
the machine at an early stage, replace the current bearing with a new one and do notreuse the current one. Since there is a risk that the housing may be cracked depending
on how stuck the bearing is, use extra caution during work.
Rolling
element

Extraction toolTie rod(Fig. 1-1)

(Fig. 1-2)

2. Removal method for eccentric locking collar type(1)

Loosen the set screw for eccentric locking collar
If the set screw tip protrudes from the eccentric collar inside
diameter surface, the shaft will be damaged when extracting theeccentric collar; therefore, it is necessary to loosen the set screw
sufficiently.

(2)

Loosen the eccentric locking collar
When loosening the eccentric locking collar, it is necessary toloosen it in the direction opposite to the shaft rotation direction. If
it is stiff, insert the tip of a cold chisel or similar tool into the drillhole of the collar and hit the chisel with a plastic hammer toloosen the collar. (Fig. 2)(3)

Remove the attachment bolt.

(4)Extract the unit.
* If the inner ring is stuck to the shaft: (Refer to 1. (3).)-1-(Fig. 2)

Insert Bearing Units (How to remove Insert Bearing Units)

3. Removal method for adapter locking type(1)

Unhook the teeth of the washer and loosen the nut by
2 to 3 turns.

(2)

Apply a punch to the side of the nut and hit around theentire circumference with a hammer to move thesleeve in the axial direction. (Fig. 3)* Note that if the nut is loosened excessively so thatthe threads are only slightly engaged, hitting with ahammer may damage the threads.
* If the sleeve is stuck to the inner ring: After removing the mounting bolt
(Refer to 1. (3)).

(3)

Remove the mounting bolt.

(4)Extract out the unit.

WasherNut

SleevePunch(Fig. 3)

If there is sufficient space for a person to enter on the opposite side of the nut, the following
method can also be used: Remove the nut, apply the punch to the end of the inner ring on theopposite side from the nut and hit the patch with a hammer in the direction to extract it from thesleeve. Be sure to put on protective equipment before work and pay careful attention during work. A
more effective removal method would be to use a hydraulic nut, but it would be necessary to designand process the unit on the shaft side in advance at the mounting stage.

-2-Jun. 2022