HE13E-004C

Instruction Manual
Insert Bearing Units(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.

Inspection ............................................................................................................................................................. 6

6.

7.

5.1

Noise ............................................................................................................................................................. 6

5.2

Rise of temperature ..................................................................................................................................... 6

Lubrication ............................................................................................................................................................ 7
6.1

Lubrication grease ....................................................................................................................................... 7

6.2

Grease replenishing method ....................................................................................................................... 8

6.3

Grease replenishment amount.................................................................................................................... 96.4

Grease replenishment interval .................................................................................................................... 9

Replacement of bearing .................................................................................................................................... 10

Attachment: Principle of eccentric locking collar securing system.......................................................................... 11

1. Scope of application
This instruction manual applies to the insert bearing units shown in Tables 1.1 and 1.2.
Remarks: This instruction manual also applies to the insert bearing units marked with auxiliary marks (Note 1) andaggregation marks (Note 2) in addition to the standard products shown in Table 1.1 and 1.2.
(Note)

1. Special and change marks showing accuracy, shape, additional processing, etc. for bearings, housings andmain parts.
2. Abbreviated marks for special parts whose nominal number consists of many characters and is complicated.

Table 1.1
Pillow block unit

Squareflangeunit

Round flangeunit withspigot joint

Rhombic flange unit

Take-upunit

Cartridgeunit

UGP204―

UGPH204

UGPA204

UGF204

UGFC204

UGFL204

UGFK204

UGFA204

UGT204

UGC204

UGP205―

UGPH205

UGPA205

UGF205UGFC205

UGFL205UGFK205

UGFA205

UGT205UGC205

UGP206―

UGPH206

UGPA206

UGF206

UGFC206

UGFL206UGFK206

UGFA206

UGT206UGC206

UGP207―

UGPH207

UGPA207

UGF207

UGFC207

UGFL207

UGFK207

UGFA207

UGT207UGC207

UGP208UGIP208

UGPH208

UGPA208UGF208

UGFC208

UGFL208UGFK208

UGFA208

UGT208UGC208

UGP209UGIP209

UGPH209

UGPA209

UGF209UGFC209

UGFL209UGFK209

UGFA209

UGT209UGC209

UGP210UGIP210

UGPH210UGPA210

UGF210UGFC210

UGFL210UGFK210UGFA210

UGT210UGC210

UGP211

UGIP211――

UGF211

UGFC211

UGFL211―

UGFA211

UGT211UGC211

UGP212

UGIP212――

UGF212

UGFC212

UGFL212――

UGT212UGC212

UGP213

UGIP213――

UGF213

UGFC213

UGFL213――UGT213

UGC213

Table 1.2
Pillow block unit

Square flangeunit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

Cartridge unit

UGP306―

UGF306

UGFS306

UGFL306

UGT306UGC306

UGP307―

UGF307UGFS307

UGFL307

UGT307UGC307

UGP308―UGF308UGFS308

UGFL308

UGT308UGC308

UGP309―UGF309UGFS309

UGFL309

UGT309UGC309UGP310―

UGF310UGFS310

UGFL310

UGT310UGC310

UGP311―UGF311UGFS311

UGFL311

UGT311UGC311UGP312―UGF312

UGFS312

UGFL312

UGT312UGC312

UGP313

UGIP313

UGF313

UGFS313

UGFL313

UGT313UGC313

UGP314

UGIP314

UGF314

UGFS314

UGFL314

UGT314UGC314

UGP315

UGIP315

UGF315UGFS315

UGFL315

UGT315UGC315

UGP316

UGIP316

UGF316

UGFS316

UGFL316

UGT316UGC316

UGP317

UGIP317

UGF317UGFS317

UGFL317

UGT317UGC317

UGP318UGIP318

UGF318UGFS318

UGFL318

UGT318UGC3181

2. Name of parts and functions
Rubber seal
Slinger

Grease fitting
Outer ring
Housing
Steel ballInner ring

Eccentric locking collar

Retainer

Locking pin

Dowel pin pads

Name of parts

Functions

Grease fitting

A part to supply lubrication grease to enable the service lives of bearings to be extended by supplying grease at aninterval suitable for the use environment.

Eccentric locking
collar

Secures the insert bearing and collar. 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.

Dowel pin pads

Providing a pin hole at this position makes it easy to position the insert bearing unit when replacing bearings and isconvenient for reinforcing the mounting bolts.

Locking pin

Prevents the outer ring from drag turning and the section between the bearing and housing from being worn.

Rubber seal

Prevents dust and moisture from intruding because it is secured to the outer ring and the lip part comes in contact
with the inner ring.

SlingerPrevents dust from intruding by centrifugal force because it is secured to the inner ring and rotates together with theinner ring.

23. Selection of shafts
For the shaft on which the insert bearing unit is mounted, use one that is not bent and does not have burrs, and performchamfering of the shaft end.
The press-fitting of the inner ring and shaft is mostly performed by a running fit in general for convenience in handling. Thevalues shown in Table 3.1 are considered appropriate for the shaft dimensional tolerance in the case of loose press-fitting.
For high precision operation, high speed rotation, heavy and/or shock load application, interference fit is recommended forthe fit between the shaft and the bearing inner ring. When applying tight fit like this, it is recommended to follow thedimensional tolerance for the shaft as shown as per the Table 3.2. For such tight fit between the bearing and the shaft, theinitial bearing internal clearance must be larger than its standard clearance.
Table 3.1: Shaft dimensional tolerance (for loose press-fitting)
Shaft dimensional tolerance (μm)

Shaft diameter (mm)Over

Or less

js7h7h81018±90 to -18

0 to -27

1830±10.5

0 to -21

0 to -333050±12.5

0 to -25

0 to -3950

80±150 to -30

0 to -4680120±17.5

0 to -35

0 to -54

Remarks: In general, js7 shall be applied.
Table 3.2: Shaft dimensional tolerance (for tight press-fitting)
Shaft dimensional tolerance (μm)

Shaft diameter (mm)OverOr lessn6n7m6m71018+23 to +12+30 to +12+18 to +7+25 to +71830+28 to +15+36 to +15+21 to +8+29 to +830

50+33 to +17+42 to +17+25 to +9+34 to +950

80+39 to +20+50 to +20+30 to +11+41 to +1180

120+45 to +23+58 to +23+35 to +13+48 to +13

Remarks: If the shaft diameter is 30mm or less, it is better that values other than m6 are not used.

34. Mounting method1) Slide the insert bearing unit onto the shaft slowly and bring it to thepredetermined position. (Photo 4.1)

Photo 4.1

2) Mount the insert bearing unit on the machine base and secure it
firmly with bolts. (Photo 4.2)

Fig. 4.2

3) Press-fit the eccentric part of the eccentric locking collar into theeccentric 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 to secure theeccentric locking collar to the shaft.

Fig. 4.3

4

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, do not allow the shaft to come in direct contact with theside of the inner ring or the slinger and use extra caution to prevent it from being twisted.
If strong impact is applied to the insert bearing unit, it is possible that the slingers on both sides maymove and come in contact with the rubber seal. In this case, the rotation torque becomes larger,
which may cause abnormal heating and noise to be generated if the insert bearing unit is used insuch condition. After mounting the insert bearing unit, applying strong impact when mounting
transmission system parts such as pulleys, sprockets, etc. on the shaft may cause the same
phenomenon, so extra caution should be taken to prevent strong impact from being applied to theinsert bearing unit.
3. The machine base on which the insert bearing unit ismounted must have high rigidity and high flatness toprevent the housing from being deformed.
(Excluding cartridge type and take-up type models)Inside diameter numberFlatness

13 or less(shaft diameter: Φ65 or less)

0.1mm or less14 or higher(shaft diameter: Φ70 or more)

0.15mm or less

4. 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 a jig
such as a chisel and tighten further with a plastichammer.) (Photo 4.4)b) Use a stepped shaft and apply the inner ring to theshoulder.
c) When using the insert bearing unit with 2 eccentriclocking collars in pairs, mount it properly so thatboth eccentric locking collars are positioned on theoutside or inside. (At this time, the insert bearing
unit cannot bear large axial loads.)d) Secure the inner ring using the collar for securing

Photo 4.4

in the axial direction.
5. The values shown in Table 4.1 are considered appropriate for the tightening torque of set-screws.
6. The values shown in Table 4.2 are considered appropriate for tightening torque of housing mounting bolts.
7. Use washers to prevent the housing from being damaged when fixing the bearing unit on the mounting basewith bolts.
Table 4.1: Appropriate tightening torque of set-screws
Bearing nominal number
UG+ER
204, 205－
206
306
207 to 210
307 to 310
211, 212
311 to 313－
314－
315 to 317－
318

Set-screw nominal
number
M6×0.75
M8×1
M10×1.25
M12×1.5
M14×1.5
M16×1.5
M18×1.5

Hexagonal wrench key
nominal number
345
6688Appropriate tightening torque(N･m)
4.9
11.8
23.5
3939
66.6
66.6

Table 4.2: Tightening torque of housing mounting bolts (reference values)
Bolt nominal
number
M5
M6
M8
M10
M12Torque(N･m)
1.7 to 2.7
2.8 to 4.5
6.9 to 11
14 to 2224 to 38

Bolt nominal
number
M14
M16
M18
M20
M22

Torque(N･m)
38 to 61
59 to 95
81 to 130
118 to 186
157 to 250

Bolt nominal
number
M24
M27
M30
M33
M36

Torque(N･m)
196 to 319
294 to 466
397 to 632
539 to 862
691 to 1107

55. 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 byelectric power to inspect for noise or temperature increases.

5.1 Noise
Touch the housing with a listening rod or screwdriver and listen fornoises during operation to check for abnormalities. (Photo 5.1)
For normal operation conditions, a smooth rotation noise is generated,
but if there is an abnormality in mounting, an abnormal noise may begenerated.

Photo 5.1: Checking the rotation noise with a listening rod

5.2 Rise of temperature
Measure the temperature on the outer circumferences of the bearing
outer ring and housing. (Photos 5.2 and 5.3)
The rise of temperature reaches saturation 2 to 3 hours after start ofoperation and the insert bearing unit reaches to the regular conditions
in general; however, if there are abnormalities in mounting, etc., thetemperature will increases excessively, which will prevents the insert
bearing unit from reaching the regular conditions. (For temperature
measurement of cartridge type bearings, measure at the side ofhousing.)

Photo 5.2: Temperature measurement (contact type)

Inspect the above items during commissioning and start operating theinsert bearing unit fully 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 theresults of periodic inspections and other inspections is an effective
measure for preventing accidents and damage to machinery.
For the bearing failure and its preventive measures during the test run
and the periodical inspection of the insert bearing units, please refer toour General Catalogue and/or access ASAHI WEBSITE to ‘Inspection
and Failure’.

6

Photo 5.3: Temperature measurement (non-contact type)6. Lubrication
6.1 Lubrication grease
This insert bearing has been factory-lubricated with the grease shown in Table 6.1. Therefore, it is recommended that thesame grease as the factory-lubricated grease be used.
Table 6.1: Properties of standard factory-lubricated grease
Type

Auxiliarymark

Product name

Manufacturer
name

NLGINo.

Soap-based
greaseDrop point(°C)

Usabletemperaturepoint (°C)

Remarks

For general use－Alvania Grease S

Shell Lubricants
Japan

3Li

182

-20 to +135

－Forheat-resistant
use

HR4
HR5

Super Lube

Yuken Kogyo

3Ca-mixed

300 or more

-20 to +200－－(Microgel)Approx. 250-70 to +150

Equivalent
with the level
betweenNLGI No. 1
and 2

2

Al-mixed

260-12 to +163

－Type

Auxiliary
markForlow-temperatureresistant use

CR2A

AeroShell Grease 7

Shell LubricantsJapanFor foodmachines use

FDHR20

CLARION ® FOOD
MACHINERYHTEPGREASE, NO.2

CITGO
PetroleumCorporationRemarks: 1. The usable temperature ranges in theabove table are the ranges for the grease.

For general use

The usable temperature ranges for theinsert bearing unit are as follows:

For heat-resistant use

theFor low-temperatureresistant use

bearing radial inside clearance has been

For food machines use

2. Forheat-resistantspecifications,designed to be larger originally; therefore,

Range of operating
temperature point (°C)－-15 to +100

HR4Normal temperature to +120

HR5

Normal temperature to +200

HR23

Normal temperature to +230

CR2A

-40 to +100

FD-10 to +100

HR20(heat-resistant)-10 to +150

clearance marks such as C3, C4, etc. areadded as auxiliary marks.

* HR23 specifications
For H23 specifications, the insert bearing chamber has been filled with fluorinated high-quality heat-resistant grease andlubrication-free insert bearing units are provided as standard.
The lubrication-free type shows all insert bearing units having specifications not equipped with a grease filling mechanism, such asspecifications using completely-lubrication-free type housings whose housing nominal number includes an auxiliary mark “G00”,specifications whose housing grease fitting hole is blocked with “KU” and “KA” steel plugs, etc. (Figs. 6.1 to 6.3)

Fig. 6.1: Lubrication type
insert bearing unit
Example of nominal number: UGP205

Fig. 6.2: Lubrication-free type
insert bearing unit (G00 specifications)
Example of nominal number: UGP205G00

Fig. 6.3: Lubrication-free type
insert bearing unit
(Steel-plug filled specifications)
Example of nominal number: UGP205/KU76.2 Grease replenishing method
Replenish grease using a grease gun (Photo 6.1) from the grease
fitting mounted on the housing. Be careful to prevent dust or otherforeign materials from getting into the grease to be replenished. If thegrease fitting is contaminated, wipe it off before replenishing.

Photo 6.1: Grease gun

Photo 6.2: Example of filling with a grease gun

Grease is injected into the inside of the bearing from the grease hole ofthe outer ring through the grease groove provided on thecircumference of the spherical bearing seat from the grease fitting
replenishing port. Injected grease is stirred by the rotation of thebearing and mixed with previously-injected grease in the bearing andexcess grease is discharged from the section between the slinger andouter ring through the rubber seal lip part. (Photo 6.3, Fig. 6.4)

Re-lubrication should be performed during operation to cause thegrease to be spread into every corner of the inside of the bearing.
However, if it is difficult to replenish grease during operation because
replenishment during operation at high speed may cause dangerous

Photo 6.3: Normal grease discharging conditions
from inside the bearing

accidents, after replenishing the grease while operation is stopped,
continue to replenish while performing intermittent operation to cause
the grease to be mixed by manual operation or regular operation.
Replenishing with a large amount of grease at one time while
operation is stopped may cause the rubber seal to be peeled byinternal pressure acting on the rubber seals on both sides fromthe grease and the seals may come in contact with the slinger. In
this case, the rotation torque will increase, which may cause
abnormal heating conditions to be generated if the insert bearing
unit is operated without correcting the situation.
Fig. 6.4: Grease circulation route8* Low torque specifications (auxiliary: TAA)
Low-torque specifications are exhibited as “TAA” in which
non-contact type rubber seals (Fig. 6.5) are used, Alvania Grease S1(NLGI No. 1) is used as the factory-lubricated grease. The
pre-lubricated grease amount is designed to be 1/3 of standard
amount; note that if grease is replenished, the amount of insidegrease increases.
Fig. 6.5: Non-contact seal

6.3 Grease replenishment amountThe values shown in Table 6.2 are considered appropriate for grease replenishment amounts. If it is difficult to replenish
grease quantitatively, replenish grease until deteriorated grease comes out from the clearance between the outer ring andslinger as a reference of the replenishment amount. (Photo 6.3)
Table 6.2: Grease replenishment amount
Bearing nominal number
UG204
UG205
UG206
UG207
UG208
UG209
UG210
UG211
UG212
UG213
－－－－－

Grease replenishment
amount
1.2
1.4
2.2
3.2
3.9
5
5.4
7.4
1011.8－－－－－

Unit: gBearing nominal number－－
UG306
UG307
UG308
UG309
UG310
UG311
UG312
UG313
UG314
UG315
UG316
UG317
UG318

Grease replenishment
amount－－
3.8
5.7
7.8
9.4
12.8
16.4
2126
31.5
38
415262(Note) The replenishment amount shows the amount per one shot.

6.4 Grease replenishment interval
The recommended grease replenishment interval is shown in Table 6.3.
Table 6.3: Grease replenishment interval
Environment conditions

Bearing operation
temperature(℃)

Very clean

Very dirty

50 or less

3 years

6 months

Very dirty, very humid,much splashing
3 months

70

1 year2 months

1 month100

2.5 months

2 weeks

1 week120

1.5 months

1 week3 days150

2 weeks

3 daysEvery day9

7. Replacement of bearing
When replacing the insert bearing unit with a new one, if either the bearing or housing is slightly damaged, replacement ofeither one is possible instead of replacing both ones.
When assembling the bearing into the housing, position the bearing

Notched partof housing

outer ring at right angles to the bearing seat, and press-fit it into thenotched part of housing, and then turn the bearing. (Photo 7.1)

Grease holeof outer ring

Locking pin of outer ring
Photo 7.1

At this time, ensure that the outer ring locking pin is inserted into thenotched part of housing. Note that forcibly pressing the locking pin

Locking pin

in the bearing seat other than at the notched part may cause outerring cranking. (Photo 7.2)

Photo 7.2

Further, when replenishing grease, in order to help the grease spread
into every corner of the inside of the bearing, it is recommended toGrease holeof outer ring

Grease fitting holeassemble the bearing so that the grease hole of outer ring is locatednear the grease fitting of housing. (Photo 7.3)

Photo 7.3

10

Attachment: Principle of eccentric locking collar
securing system
This is the method for securing the bearing to the shaft by providing inside or outside eccentric convex or concave-shaped
parts on the inner ring end and providing wedges on the circumference using corresponding eccentric locking collars.

The press-fitting of the inner ring and shaft is mostly performed by a running fit in general for convenience in handling. In thiscase, there is a gap between the inner ring and shaft (eccentric locking collar) and the rotation of shaft (eccentric lockingcollar) does not match with the rotation of inner ring.
Because of differences in circumferential length between the shaft andinner ring, the inner ring is misaligned by the circumferential difference
amount every rotation of shaft, and relative to each other, it will look as
if the inner ring is rotating in the opposite direction to the shaft rotation
direction. In other words, because the eccentric locking collar issecured to the shaft, it will look as if it is tightening to the inner ring in
the rotation direction.
The force to make the inner ring seem to rotate in the opposite
direction to the shaft rotation direction becomes larger in proportion to
the radial loads acting on. By these loads, wedges are formed on theeccentric part, which provides excellent securing force.
If tightening the eccentric locking collar in the opposite direction to the shaft rotation direction by way of experiment, theeccentric locking collar is loosened once and then tightened.
Therefore, when mounting the eccentric locking collar, it is only necessary to tighten it in the shaft rotation direction.
If using the bearing repeatedly in normal and reverse rotation directions, the above phenomenon may occur; therefore,
when mounting the eccentric locking collar, after tightening it in the shaft rotation direction, it is necessary to insert a jig suchas a chisel into the eccentric locking collar drilled hole and tighten it additionally using a plastic hammer.

11

Jan.2023