Asahi Seiko Silver Series User manual

HE20E-001A
Instruction Manual
Insert Bearing Units
Silver Series
Stainless-Steel Silver Series
(Eccentric locking collar type)

Table of Contents
Page
1. Scope of application .........................................................................................................................................................................1
2. Name of parts and functions ............................................................................................................................................................2
3. Selection of shafts ............................................................................................................................................................................3
4. Mounting method..............................................................................................................................................................................4
5. Stainless-steel cover attachment/removal method .........................................................................................................................6
1) Attaching the cover ......................................................................................................................................................................6
2) Removing the press-fit locking cover ..........................................................................................................................................7
6. Inspection..........................................................................................................................................................................................8
1) Noise ............................................................................................................................................................................................8
2) Rise of temperature .....................................................................................................................................................................8
7. Lubrication.........................................................................................................................................................................................9
8. Replacement of bearing.................................................................................................................................................................10

Insert Bearing Units (Eccentric locking collar type)
1
1. Scope of application
This instruction manual applies to the insert bearing units shown in Tables 1.1 and 1.2.
Table 1.1: Standard product units
Silver Series
Stainless-Steel Silver Series
Pillow block unit
Rhombic flange
unit
Pillow block unit
Rhombic flange
unit
---
UP000
UP001
UP002
UP003
UP004
UP005
UP006
UFL08
UFL000
UFL001
UFL002
UFL003
UFL004
UFL005
UFL006
---
MUP000
MUP001
MUP002
MUP003
MUP004
MUP005
MUP006
---
MUFL000
MUFL001
MUFL002
MUFL003
MUFL004
MUFL005
MUFL006
Remark: This instruction manual also applies to the insert bearing units marked with auxiliary marks (Note 1) and
aggregation marks (Note 2) in addition to the standard products shown in Table 1.1.
(Note) 1. Special and change marks showing accuracy, shape, additional processing, etc. for bearings, housings and
main parts.
2. Abbreviated marks for special parts whose nominal number consists of many characters and is complicated.
Table 1.2: Units with steel plate cover
Silver Series
Stainless-Steel Silver Series
Pillow block unit
Rhombic flange
unit
Pillow block unit
Rhombic flange
unit
UP000C(E)
UP001C(E)
UP002C(E)
UP003C(E)
UP004C(E)
UP005C(E)
UP006C(E),Y
UFL000C(E)
UFL001C(E)
UFL002C(E)
UFL003C(E)
UFL004C(E)
UFL005C(E)
UFL006C(E),Y
MUP000C(E)
MUP001C(E)
MUP002C(E)
MUP003C(E)
MUP004C(E)
MUP005C(E)
MUP006C(E),Y
MUFL000C(E)
MUFL001C(E)
MUFL002C(E)
MUFL003C(E)
MUFL004C(E)
MUFL005C(E)
MUFL006C(E),Y
Remarks 1: “,Y” indicates units that have a press-fit cover and do not use a clip.
Remarks 2: This instruction manual also applies to insert bearing units marked with auxiliary marks (Note 1) and
aggregation marks (Note 2) in addition to the standard products shown in Table 1.2.
(Note) 1. Special and change marks showing accuracy, shape, additional processing, etc. for bearings, housings and
main parts.
2. Abbreviated marks for special parts whose nominal number consists of many characters and is complicated.

Insert Bearing Units (Eccentric locking collar type)
2
2. Name of parts and functions
Rubber seal: Prevents grease leakage and dust and moisture intrusion because it is secured to the outer ring
and the lip part comes in contact with the inner ring.
Eccentric locking collar: Secures the insert bearing and shaft. This collar is provided with an eccentric part which drives
several wedges on the circumferences of the inner ring eccentric part and shaft to secure the
bearing to the shaft.
Eccentric locking collar
Set screw
Housing
Outer ring
Inner ring
Rubber seal
Steel ball
Retainer

Insert Bearing Units (Eccentric locking collar type)
3
3. Selection of shafts
For the shaft on which the insert bearing unit will be mounted, use one that is not bent and does not have burrs, and
perform chamfering of the shaft ends. The press-fitting of the inner ring and shaft is mostly performed by a running fit in
general for convenience in handling. The values shown in Table 3.1 are considered appropriate for the shaft dimensional
tolerance in the case of loose press-fitting.
If high-precision operation and high-speed rotation are required, it is better to perform the press-fitting between the inner
ring and shaft by interference fit. The values shown in Table 3.2 are considered appropriate for the shaft dimensional
tolerance in the case of tight press-fitting. If using an insert bearing unit with eccentric locking collar for interference fit, it is
unnecessary to use a separate eccentric locking collar. For tight press-fitting of the bearing and shaft, the initial clearance
of the bearing must have been designed in advance to be larger than that of standard specification.
Table 3.1: Shaft dimensional tolerance (for loose press-fitting)
Shaft diameter (mm)
Shaft dimensional tolerance (μm)
Over
Or less
js7
h7
6
10
18
10
18
30
±7.5
±9
±10.5
0 to -15
0 to -18
0 to -21
Remarks: In general, js7 shall be applied.
Table 3.2: Shaft dimensional tolerance (for tight press-fitting)
Shaft diameter (mm)
Shaft dimensional tolerance (μm)
Over
Or less
m6
6
10
18
10
18
30
+15 to +6
+18 to +7
+21 to +8

Insert Bearing Units (Eccentric locking collar type)
4
4. Mounting method
1) Slide the insert bearing unit onto the shaft slowly and bring it to the predetermined position. (Photo 4.1)
2) Mount the insert bearing unit on the machine base and secure it firmly with bolts. (Photo 4.2) (Refer to Table 4.1.)
3) Press-fit the eccentric part of the eccentric locking collar into the eccentric part provided on the bearing inner ring.
(Photo 4.3)
4) Tighten the eccentric locking collar in the shaft rotation direction.
5) Tighten the set screws with a hexagonal wrench key and secure them to the shaft. (Refer to Table 4.2.)
Remarks: 1. Before sliding the eccentric locking collar onto the shaft, check that the tips of set screws do not protrude
from the inside diameter of bearing. If a tip protrudes, loosen the set screw.
2. When sliding the insert bearing unit onto the shaft, be careful that the unit does not get twisted. In addition,
do not tap the inner ring side or the rubber seal directly.
3. The values shown in Table 4.1 are considered appropriate for the tightening torque for bolts for the bearing
housing.
4. The machine base to which the unit is mounted must be rigid enough and flat to prevent the bearing housing
from be deformed. (Flatness: 0.1mm or lower)
5. In case of systems rotating in both normal and reverse directions, the following method should be taken.
a) After tightening the eccentric locking collar by hand, tighten it further with a larger torque. (Insert jigs
such as a chisel, etc. into the eccentric locking collar drill hole and tighten further with a plastic hammer.)
(Photo 4.4)
b) Use a stepped shaft and apply the inner ring to the shoulder.
c) When using the insert bearing unit with 2 eccentric locking collars in pairs, mount it properly so that both
eccentric locking collars are positioned on the outside or inside. (At this time, the insert bearing unit
cannot bear large axial loads.)
d) Secure the inner ring using the collar for securing in the axial direction.
6. The values shown in Table 4.2 are considered appropriate for tightening torque of eccentric locking collars.

Insert Bearing Units (Eccentric locking collar type)
5
Photo 4.1
Photo 4.2
Photo 4.3
Photo 4.4
Table 4.1: Tightening torque of housing mounting bolts (Reference value)
Nominal size of screw
Torque
(N•m)
M4
M6
M8
M10
0.9 to 1.4
2.8 to 4.5
6.9 to 11
14 to 22
Table 4.2: Tightening torque of set screws for eccentric locking collars and axial load-bearing capacity of unit
Nominal number
of applicable
bearing
Nominal size
of set screw
Nominal size of
hexagonal
wrench
Tightening torque
(N•m)
Axial load-
bearing capacity
(kN)
U08
M3×0.5
1.5
0.59
0.39
U000 to 003
MU000 to 003
M4×0.7
2
1.5
0.88
U004 to 006
MU004 to 006
M5×0.8
2.5
2.9
1.76

Insert Bearing Units (Eccentric locking collar type)
6
5. Stainless-steel cover attachment/removal method
1) Attaching the cover
*Attach the cover after completion of attachment of the unit main body.
*Apply an amount of grease corresponding to 1/3 to 1/2 of the volume of the space inside the cover to that space.
(Fig. 5.1)
In the case of clip-locking type
•Pillow block (Fig. 5.2)
(1) Hook the claw on one side of the clip into the groove on one side of the cover.
(2) Push the claw on the other side of the clip strongly into the cover groove on the opposite side.
•Rhombic flange (Fig. 5.3)
(1) Hook the L-shaped claw of the clip onto the clip seat of the bearing housing.
(2) Push the other claw strongly into the cover groove.
*If it is difficult to install the clip, first hook the claw of the clip into the cover groove and then push it into the
clip seat of the bearing housing.
In the case of press-fit locking type
(1) Press the cover against the spigot joint of the bearing housing and push it into the spigot joint with your
fingers. (Photo 5.4)
(2) Tilt the cover and push the lower side of the outer rim of the cover into the spigot joint of the bearing housing
with your fingers, and push the outer rim at the opposite position into the bottom of the slit using a tool such as
a screwdriver. (Photo 5.5)
(3) Repeat for other positions of the cover, pressing them in on both sides of the symmetrical position in sequence
with a screwdriver, etc. to make sure the entire circumference of the cover is pressed in uniformly.
Fig. 5.1
Fig. 5.2
Fig. 5.3
Photo 5.4
Photo 5.5
(2) Push strongly
(1)
(2) Push
strongly
(1)
Pack with grease

Insert Bearing Units (Eccentric locking collar type)
7
2) Removing the press-fit locking cover
Apply the screwdriver to the boundary between the outer cylinder and the cone of the cover, and tilt it in the axial
direction. Tap with a plastic hammer to remove the cover. (Photo 5.6)
Photo 5.6
Note
1. For the inner cover with a rubber seal, slide the cover onto the shaft in advance before mounting the unit main
body.
2. In order to improve dust and moisture resistance, apply grease also to the surface of the shaft that comes into
contact with the spigot joint of the bearing housing and the lip part of the rubber seal in advance.
3. About press-fit locking cover
The removed cover can be reused if it is not deformed, but if the cover is deformed such that the diameter of the
outer rim becomes smaller when it is removed, the interference with the bearing housing spigot joint is reduced
and the cover is easier to remove, so it is recommended to replace it with a new cover.

Insert Bearing Units (Eccentric locking collar type)
8
6. Inspection
After finishing mounting the insert bearing unit, inspect whether the mounting conditions are appropriate or not.
First, turn the shaft by hand to check that the insert bearing unit rotates smoothly. If no problem is observed, rotate it by
electric power to inspect for noise or temperature increases.
1) Noise
Touch the housing with a listening rod or screwdriver and listen for noises during operation to check for abnormalities.
(Photo 6.1)
For normal operation conditions, a smooth rotation noise is generated, but if there is an abnormality in mounting, an
abnormal noise may be generated.
2) Rise of temperature
Measure the temperature on the outer circumferences of the bearing outer ring or housing during operation. (Photos
6.2 and 6.3)
The rise of temperature reaches saturation 2 to 3 hours after start of operation and the insert bearing unit reaches its
regular conditions; however, if there are abnormalities in mounting, etc., the temperature will increases excessively,
which will prevent the insert bearing unit from reaching its regular conditions.
Inspect the above items during commissioning and start operating the insert bearing unit fully only after checking that
there is no abnormality.
Further, it is recommended that inspections also be performed periodically at the predetermined interval during
operation to detect failures in the bearings at an early stage.
In addition, monitoring to check that there are no changes in noise or increases in temperature by comparing the
differences between the results of the current periodic inspections and other inspections is an effective measure for
preventing accidents and damage to machinery.
For main abnormalities and countermeasures during commissioning and periodic inspection, check the general
catalogue for insert bearing units and the page “Inspection and malfunction
(https://www.asahiseiko.co.jp/qa/bearings.html)” on our website.
Photo 6.1: Checking the rotation
noise with a listening rod
Photo 6.2: Temperature
measurement (contact type)
Photo 6.3: Temperature
measurement (non-contact type)

Insert Bearing Units (Eccentric locking collar type)
9
7. Lubrication
This unit insert bearing has been factory-lubricated with the grease shown in Table 7. This unit uses the lubrication-free
type.
Table 7: Properties of standard factory-lubricated grease
Type
Model
Product name
Manufacturer name
NLGI
No.
Soap-
based
grease
Drop
point
(°C)
Usable
temperature
point
(°C)
For general
use
UP, UFL
Alvania Grease S
Shell Lubricants Japan K.K.
3
Li
182
-25 to +135
For food
machine
use
MUP, MUFL
CLARION @ FOOD
MACHINERY HTEP
GREASE, No. 2
CITGO Petroleum
Corporation
2
Al-mixed
260
-12 to +163
* The usable temperature point of this unit is -10 to + 80°C.

Insert Bearing Units (Eccentric locking collar type)
10
8. Replacement of bearing
When replacing the insert bearing unit with a new one, if either the bearing or housing is slightly damaged, replacement of
either one is possible instead of replacing both ones.
When assembling the bearing into the housing, position the bearing outer ring at right angles to the bearing seat, and
press-fit it into the notched part of housing, and then turn the bearing. (Photos 8.1, 8.2 and 8.3)
Photo 8.1
Photo 8.2
Photo 8.3
Notched part of
housing

Mar. 2021