HE13E-003F

Instruction Manual
Insert Bearing Units(Adapter locking type)Table of Contents
Page

1.

Scope of application ..........................................................................................................................................1

2.

Name of parts and functions .............................................................................................................................43.

Selection of shafts .............................................................................................................................................54.

Attaching method ..............................................................................................................................................65.

Installation the covers .......................................................................................................................................96.

Inspection ........................................................................................................................................................10

7.

8.

6.1

Noise ........................................................................................................................................................10

6.2

Rise of temperature .................................................................................................................................10

Lubrication ....................................................................................................................................................... 11
7.1

Lubrication grease ................................................................................................................................... 11

7.2

Grease replenishing method ...................................................................................................................12

7.3

Grease replenishment amount ...............................................................................................................13

7.4

Grease replenishment interval ................................................................................................................14

Replacement of bearing..................................................................................................................................15

Attachment: Recommendation value for tightening torque of an adapter and tightening angle of an adapter nut

1. Scope of application
This instruction manual applies to the insert bearing units shown in Tables 1.1 to 1.6.
Remarks: 1. 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 to 1.6.
2. Although UK-type insert bearing units are provided as a set with adapters as a rule, “+H” is deleted in thistable.
(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
Squareflangeunit

Pillow block unit

Round flange
unit with
spigot joint

Take-upunit

Rhombic flange unit

Cartridge
unit

UKP205―

UKPH205

UKPA205

UKF205

UKFC205

UKFL205

UKFK205

UKFA205

UKT205

UKC205

UKP206―

UKPH206

UKPA206

UKF206

UKFC206

UKFL206

UKFK206

UKFA206

UKT206

UKC206

UKP207―

UKPH207

UKPA207

UKF207

UKFC207

UKFL207

UKFK207

UKFA207

UKT207

UKC207

UKP208

UKIP208

UKPH208

UKPA208

UKF208

UKFC208

UKFL208

UKFK208

UKFA208

UKT208

UKC208

UKP209UKIP209

UKPH209

UKPA209

UKF209UKFC209

UKFL209

UKFK209

UKFA209

UKT209UKC209UKP210

UKIP210

UKPH210

UKPA210

UKF210

UKFC210

UKFL210

UKFK210

UKFA210

UKT210

UKC210

UKP211

UKIP211――

UKF211

UKFC211

UKFL211―

UKFA211

UKT211

UKC211

UKP212

UKIP212――

UKF212

UKFC212

UKFL212――

UKT212

UKC212

UKP213

UKIP213――

UKF213

UKFC213

UKFL213――

UKT213

UKC213

UKP215―――

UKF215

UKFC215

UKFL215――

UKT215―

UKP216―――

UKF216

UKFC216

UKFL216――

UKT216―

UKP217―――

UKF217

UKFC217

UKFL217――

UKT217―

UKP218―――

UKF218

UKFC218

UKFL218

―

―

―

―

Table 1.2
Pillow block unit

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

UKPX05

UKFX05

UKFCX05

UKFLX05

UKTX05

UKPX06

UKFX06

UKFCX06

UKFLX06

UKTX06

UKPX07

UKFX07

UKFCX07

UKFLX07

UKTX07

UKPX08

UKFX08UKFCX08

UKFLX08

UKTX08

UKPX09UKFX09UKFCX09

UKFLX09

UKTX09UKPX10

UKFX10UKFCX10

UKFLX10

UKTX10

UKPX11

UKFX11

UKFCX11―

UKTX11

UKPX12

UKFX12

UKFCX12―

UKTX12

UKPX13

UKFX13

UKFCX13―

UKTX13

UKPX15

UKFX15

UKFCX15―

UKTX15

UKPX16

UKFX16

UKFCX16―

UKTX16

UKPX17

UKFX17

UKFCX17―

UKTX17

UKPX18

UKFX18UKFCX18――

UKPX20

UKFX20UKFCX20――

1

Table 1.3
Pillow block unit

Square flangeunit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

Cartridge unit

UKP305―

UKF305

UKFS305

UKFL305

UKT305

UKC305

UKP306―

UKF306

UKFS306

UKFL306

UKT306

UKC306

UKP307―

UKF307

UKFS307

UKFL307

UKT307

UKC307

UKP308―

UKF308

UKFS308

UKFL308

UKT308UKC308

UKP309―UKF309UKFS309

UKFL309

UKT309UKC309UKP310―

UKF310

UKFS310

UKFL310

UKT310

UKC310

UKP311―

UKF311

UKFS311

UKFL311

UKT311

UKC311

UKP312―

UKF312

UKFS312

UKFL312

UKT312

UKC312

UKP313

UKIP313

UKF313

UKFS313

UKFL313

UKT313

UKC313

UKP315

UKIP315

UKF315

UKFS315

UKFL315

UKT315

UKC315

UKP316

UKIP316

UKF316

UKFS316

UKFL316

UKT316

UKC316

UKP317

UKIP317

UKF317

UKFS317

UKFL317

UKT317

UKC317

UKP318

UKIP318

UKF318

UKFS318

UKFL318

UKT318

UKC318

UKP319UKIP319

UKF319UKFS319

UKFL319

UKT319UKC319UKP320

UKIP320

UKF320

UKFS320

UKFL320

UKT320

UKC320

UKP322

UKIP322

UKF322

UKFS322

UKFL322

UKT322

UKC322

UKP324

UKIP324

UKF324

UKFS324

UKFL324

UKT324UKC324

UKP326

UKIP326

UKF326

UKFS326

UKFL326

UKT326

UKC326

UKP328

UKIP328

UKF328

UKFS328

UKFL328

UKT328

UKC328

Table 1.4: Units with cast-iron covers
Pillow block unit

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

CUKP205C(CE)―CUKF205C(CE)CUKFC205C(CE)CUKFL205C(CE)CUKT205C(CE)CUKP206C(CE)―CUKF206C(CE)CUKFC206C(CE)CUKFL206C(CE)CUKT206C(CE)CUKP207C(CE)―CUKF207C(CE)CUKFC207C(CE)CUKFL207C(CE)CUKT207C(CE)CUKP208C(CE)CUKIP208C(CE)CUKF208C(CE)CUKFC208C(CE)CUKFL208C(CE)CUKT208C(CE)CUKP209C(CE)CUKIP209C(CE)CUKF209C(CE)CUKFC209C(CE)CUKFL209C(CE)CUKT209C(CE)CUKP210C(CE)CUKIP210C(CE)CUKF210C(CE)CUKFC210C(CE)CUKFL210C(CE)CUKT210C(CE)CUKP211C(CE)CUKIP211C(CE)CUKF211C(CE)CUKFC211C(CE)CUKFL211C(CE)CUKT211C(CE)CUKP212C(CE)CUKIP212C(CE)CUKF212C(CE)CUKFC212C(CE)CUKFL212C(CE)CUKT212C(CE)CUKP213C(CE)CUKIP213C(CE)CUKF213C(CE)CUKFC213C(CE)CUKFL213C(CE)CUKT213C(CE)CUKP215C(CE)―CUKF215C(CE)CUKFC215C(CE)CUKFL215C(CE)CUKT215C(CE)CUKP216C(CE)―CUKF216C(CE)CUKFC216C(CE)CUKFL216C(CE)CUKT216C(CE)CUKP217C(CE)―CUKF217C(CE)CUKFC217C(CE)CUKFL217C(CE)CUKT217C(CE)CUKP218C(CE)―CUKF218C(CE)CUKFC218C(CE)CUKFL218C(CE)―2

Table 1.5: Units with cast-iron covers
Pillow block unit

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

CUKP305C(CE)―CUKF305C(CE)CUKFS305C(CE)CUKFL305C(CE)CUKT305C(CE)CUKP306C(CE)―CUKF306C(CE)CUKFS306C(CE)CUKFL306C(CE)CUKT306C(CE)CUKP307C(CE)―CUKF307C(CE)CUKFS307C(CE)CUKFL307C(CE)CUKT307C(CE)CUKP308C(CE)―CUKF308C(CE)CUKFS308C(CE)CUKFL308C(CE)CUKT308C(CE)CUKP309C(CE)―CUKF309C(CE)CUKFS309C(CE)CUKFL309C(CE)CUKT309C(CE)CUKP310C(CE)―CUKF310C(CE)CUKFS310C(CE)CUKFL310C(CE)CUKT310C(CE)CUKP311C(CE)―CUKF311C(CE)CUKFS311C(CE)CUKFL311C(CE)CUKT311C(CE)CUKP312C(CE)―CUKF312C(CE)CUKFS312C(CE)CUKFL312C(CE)CUKT312C(CE)CUKP313C(CE)CUKIP313C(CE)CUKF313C(CE)CUKFS313C(CE)CUKFL313C(CE)CUKT313C(CE)CUKP315C(CE)CUKIP315C(CE)CUKF315C(CE)CUKFS315C(CE)CUKFL315C(CE)CUKT315C(CE)CUKP316C(CE)CUKIP316C(CE)CUKF316C(CE)CUKFS316C(CE)CUKFL316C(CE)CUKT316C(CE)CUKP317C(CE)CUKIP317C(CE)CUKF317C(CE)CUKFS317C(CE)CUKFL317C(CE)CUKT317C(CE)CUKP318C(CE)CUKIP318C(CE)CUKF318C(CE)CUKFS318C(CE)CUKFL318C(CE)CUKT318C(CE)CUKP319C(CE)CUKIP319C(CE)CUKF319C(CE)CUKFS319C(CE)CUKFL319C(CE)CUKT319C(CE)CUKP320C(CE)CUKIP320C(CE)CUKF320C(CE)CUKFS320C(CE)CUKFL320C(CE)CUKT320C(CE)CUKP322C(CE)CUKIP322C(CE)CUKF322C(CE)CUKFS322C(CE)CUKFL322C(CE)CUKT322C(CE)CUKP324C(CE)CUKIP324C(CE)CUKF324C(CE)CUKFS324C(CE)CUKFL324C(CE)CUKT324C(CE)CUKP326C(CE)CUKIP326C(CE)CUKF326C(CE)CUKFS326C(CE)CUKFL326C(CE)CUKT326C(CE)CUKP328C(CE)CUKIP328C(CE)CUKF328C(CE)CUKFS328C(CE)CUKFL328C(CE)CUKT328C(CE)

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit
UKT205C(E)

Table 1.6: Units with pressed steel covers
Pillow block unit
UKP205C(E)―UKF205C(E)

UKFC205C(E)

UKFL205C(E)

UKP206C(E)―UKF206C(E)

UKFC206C(E)

UKFL206C(E)

UKT206C(E)UKP207C(E)―UKF207C(E)

UKFC207C(E)UKFL207C(E)

UKT207C(E)UKP208C(E)

UKIP208C(E)UKF208C(E)

UKFC208C(E)UKFL208C(E)

UKT208C(E)UKP209C(E)

UKIP209C(E)UKF209C(E)

UKFC209C(E)UKFL209C(E)

UKT209C(E)UKP210C(E)

UKIP210C(E)

UKF210C(E)

UKFC210C(E)

UKFL210C(E)

UKT210C(E)

UKP211C(E)

UKIP211C(E)

UKF211C(E)

UKFC211C(E)

UKFL211C(E)

UKT211C(E)

UKP212C(E)

UKIP212C(E)UKF212C(E)

UKFC212C(E)

UKFL212C(E)

UKT212C(E)

UKP213C(E)

UKIP213C(E)UKF213C(E)

UKFC213C(E)

UKFL213C(E)

UKT213C(E)32. Name of parts and functions
Rubber seal
Slinger

Grease fitting
Outer ring
Housing

Steel ball

Adapter
Inner ring
Retainer
Locking pin

Dowel pin pads

Insert bearing unit with pressed steel covers

Name of parts

Insert bearing unit with cast-iron covers

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.

Adapter

Secures the insert bearing and shaft. The adapter is composed of an adapter sleeve, nut and washer.

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.

43. Selection of shafts
In case of taper hole type bearings (with adapters), the bearings are mounted using adapters; therefore, even if the shaft
dimensional tolerance is larger, those bearings may be used without any problem and the values shown in Table 3.1 areconsidered appropriate.
Table 3.1: Shaft dimensional tolerance
Shaft diameter (mm)Shaft dimensional tolerance (μm)

Over

Or less

h9

18

30

0 to -52

30

50

0 to -62

50

80

0 to -74

80

120

0 to -87

120

180

0 to -100

5

4. Attaching method
A video of mounting procedures is available on our homepage.
Please refer to it. Technical video “Insert bearing unit UK type
mounting method”(https://www.asahiseiko.co.jp/product/technical/movie.html)

Photo 4.1: Adapter(Adapter sleeve, washer and nut from the left)

1) Slide the adapter sleeve onto the shaft and bring it to thedesignated position.
In this case, inserting the tip of a screwdriver or a similar object in
the break of the adapter sleeve to expand it enables you to slide
the adapter onto the shaft easily. (Fig. 4.1)

Fig. 4.1

2) Slide the insert bearing unit onto the shaft and press-fit them witheach other so that the bearing inside diameter surface comes inclose contact with the tapered outer surface of the adapter sleeve.
(Fig. 4.2)

3) Put the washer in the adapter sleeve and then tighten the nut by

Fig. 4.2

hand.
4) Mount the insert bearing unit on the machine base temporarily.
(Photo. 4.2)
At this time, for flange type insert bearing units or take-up
type insert bearing units, to prevent abnormal axial loads
from being applied when mounting the insert bearing unit on
the machine base, position the bearing correctly before
mounting. (Tighten permanently.)

Photo 4.2

65) Slightly tap the side of the sleeve diameter at the large end toincrease the contact degree of sleeve and inner ring. (Fig. 4.3)

Fig. 4.3

6) Tighten the nut by using a hook spanner torque wrench withtightening torque indicated in the appendix 1 and 2. The following
Photos 4.4 and 4.5 show a hook spanner torque wrench andvisual instruction when tightening, respectively.
A hook spanner torque wrench cannot be procured depending onsome sizes of bearings. In such cases, a nut should be tightenedwith a help of tightening angle as a guide for proper mounting(recommended tightening angles are described in the appendix 3).
When hitting a jig or screwdriver to tighten the nut by using ahammer or the like, do it little by little and keep the nut free fromexcessive loads to avoid damage or breakage of the nut.

Photo 4.4

In addition, tightening the nut excessively may cause theclearance of the bearing inside to be reduced, resulting inheat generation and seizing. On the contrary, insufficienttightening may cause slippage between the shaft and sleeveor between the sleeve and inner ring, resulting in wear, heatgeneration and seizing of slippage surface. Therefore, use
extra caution with regard to the above-mentioned points.

Photo 4.5

7) Prevent the nut from being loosened with a washer.
Bend the tooth of the washer matching the notched part of the nut
toward the notched side. If the notched part of nut does not matchwith a washer tooth, turn the nut clockwise to match. (Photo 4.6)
8) For pillow block insert bearing units, after loosening the mounting
bolt to release the axial pre-load of bearing, tighten it permanently.

Photo 4.6

7

Remarks: 1. For the shaft on which the insert bearing unit is mounted, use one that is not bent and does not have burrs.
2. The machine base on which the insert bearing unit isInside diameter number

Flatness

13 or less(shaft diameter: Φ60 or less)

0.1mm or less15 or higher(shaft diameter: Φ65 or more)

0.15mm or lessmounted must have high rigidity and high flatness toprevent the housing from being deformed.
(Excluding cartridge type and take-up type models)

3. If strong impact is applied to the insert bearing unit, it is possible that the slingers on both sides may
move and come in contact with the 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 in such condition.
After mounting the insert bearing unit, applying strong impact when mounting transmission systemparts 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 the insert bearing unit.
4. The values shown in Table 4.1 are considered appropriate for the tightening torque of housing mounting
bolts.
5. Use washers to prevent the housing from being damaged when fixing the bearing unit on the mounting basewith bolts.
Table 4.1: Tightening torque of housing mounting bolts (reference values)
Bolt nominal
number8

Torque(N･m)Bolt nominal
numberTorque(N･m)Bolt nominal
numberTorque(N･m)

M5

1.7 to 2.7

M14

38 to 61M24

196 to 319

M6

2.8 to 4.5

M16

59 to 95

M27

294 to 466
397 to 632

M8

6.9 to 11

M18

81 to 130

M30

M10

14 to 22M20

118 to 186

M33

539 to 862

M12

24 to 38

M22

157 to 250

M36

691 to 1107

5. Installation the covers
1) Attach the covers after finishing mounting the insert bearing unit.
2) Apply an amount of grease corresponding to 1/3 to 1/2 of thevolume of the space inside the covers to that space as shown in
Figs. 5.1 and 5.2.

Fig. 5.1: For pressed steel covers

3) Press-fit the spigot joint of the covers into the spigot joint of theFig. 5.2: For cast-iron covers

housing.
4) For cast-iron covers, secure it with hexagon bolts.
5) For pressed steel covers, attach it by tapping the side of thecircumference with a wood hammer or plastic hammer as shownin Fig. 5.3.

Fig. 5.3: Attaching pressed steel covers

Remarks: 1. For a rubber-sealed covers to be located inside, slide it onto the shaft before mounting it on the insert bearing
unit main body.
2. To maximize dust resistance and humidity resistance, also apply grease to the spigot joint of the housing andthe shaft surface where the lip part of the rubber seal comes in contact.

9

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 byelectric power to inspect for noise or temperature increases. If the shaft does not rotate smoothly by hand (generationof excessive torque), incorrect insert bearing unit mounting procedures may have been performed, causing theadapter to be tightened excessively and abnormal axial loads to be applied. In such case, the insert bearing unit
should be mounted again.

6.1 Noise
Touch the housing with a listening rod or screwdriver and listen fornoises 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 begenerated.

Photo 6.1: Checking the rotation noise with a listening rod

6.2 Rise of temperature
Measure the temperature on the outer circumferences of the bearing
outer ring and housing. (Photos 6.2 and 6.3)
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 of
housing.)

Photo 6.2: 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 the
results 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 to
our General Catalogue and/or access ASAHI WEBSITE to ‘Inspection
and Failure’.

10

Photo 6.3: Temperature measurement (non-contact type)7. Lubrication
7.1 Lubrication grease
This insert bearing has been factory-lubricated with the grease shown in Table 7.1. Therefore, it is recommended that thesame grease as the factory-lubricated grease be used.
Table 7.1: Properties of standard factory-lubricated grease
Type

Auxiliarymark

Product name

Manufacturer
name

NLGI
No.

Soap-based
greaseDrop point(°C)

Usabletemperaturepoint (°C)

Remarks

For general use－

Alvania Grease S

Shell Lubricants
Japan

3

Li

182

-20 to +135－

Forheat-resistant
use

HR4
HR5

Super Lube

Yuken Kogyo

3

Ca-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

AuxiliarymarkFor
low-temperatureresistant use

CR2A

AeroShell Grease 7

Shell LubricantsJapan

For foodmachines use

FD
HR20

CLARION ® FOOD
MACHINERYHTEPGREASE, NO.2

CITGO
Petroleum
Corporation

Remarks: 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

HR4

Normal temperature to +120

HR5

Normal temperature to +200

HR23

Normal temperature to +230

CR2A

-40 to +100FD

-10 to +100

HR20
(heat-resistant)-10 to +150

clearance marks such as CT3, CT4, etc.
are added 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 as
specifications 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. 7.1 to 7.3)

Fig. 7.1: Lubrication type
insert bearing unit
Example of nominal number: UKP205

Fig. 7.2: Lubrication-free type
insert bearing unit (G00 specifications)
Example of nominal number: UKP205G00

Fig. 7.3: Lubrication-free type
insert bearing unit
(Steel-plug filled specifications)
Example of nominal number: UKP205/KU

11

7.2 Grease replenishing method
Replenish grease using a grease gun (Photo 7.1) 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 7.1: Grease gun

Photo 7.2: 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 the
bearing 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 7.3, Fig. 7.4)

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 7.3: 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. 7.4: Grease circulation route12

* Low torque specifications (auxiliary: TAA)
Low-torque specifications are exhibited as “TAA” in which
non-contact type rubber seals (Fig. 7.5) 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. 7.5: Non-contact seal

7.3 Grease replenishment amountThe values shown in Table 7.2 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 7.3)
Table 7.2: Grease replenishment amount
Bearing nominal
number
UK205
UK206
UK207
UK208
UK209
UK210
UK211
UK212
UK213
UK215
UK216
UK217
UK218
―
―
―
―
―
―

Greasereplenishment
amount
1.4
2.2
3.2
3.9
5
5.4
7.4
10
11.8
15.2
18.8
23
28
―
―
―
―
―
―

Unit: gBearing nominal
number
UKX05
UKX06
UKX07
UKX08
UKX09
UKX10
UKX11
UKX12
UKX13
UKX15
UKX16
UKX17
UKX18
―
UKX20
―
―
―
―

Greasereplenishment
amount
2.2
3.2
3.9
5
5.4
7.4
10
11.8
13.6
18.8
23
28
33.5
―
46.5
―
―
―
―

Bearing nominal
number
UK305
UK306
UK307
UK308
UK309
UK310
UK311
UK312
UK313
UK315
UK316
UK317
UK318
UK319
UK320
UK322
UK324
UK326
UK328

Greasereplenishment
amount
3
3.8
5.7
7.8
9.4
12.8
16.4
21
26
38
41
52
62
73
92
133
158
194
246

(Note) The replenishment amount shows the amount per one shot.
* For insert bearing units with a cover, the grease amount in the covers increases by replenishment of grease, but this does notinterfere with operation. It is recommended that the covers be removed during overhaul (once or twice per year when used at
normal temperature), the grease in the covers be removed, and then replenishment with new grease be performed.

137.4 Grease replenishment interval
The recommended grease replenishment interval is shown in Table 7.3.
Table 7.3: Grease replenishment interval
Environment conditions

Bearing operation
temperature(℃)

Very clean

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 day14

Very dirty

8. 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.

Grease holeof outer ring

(Photo 8.1)

Locking pin of outer ring
Photo 8.1

At this time, ensure that the outer ring locking pin is inserted into thenotched part of housing. Note that forcibly pressing the locking pin
in the bearing seat other than at the notched part may cause outer

Locking pin

ring cranking. (Photo 8.2)

Photo 8.2

Further, when replenishing grease, in order to help the grease spread
into every corner of the inside of the bearing, it is recommended toassemble the bearing so that the grease hole of outer ring is locatedGrease holeof outer ring

Grease fitting holenear the grease fitting of housing. (Photo 8.3)

Photo 8.3

15

Attachment : Recommended torque value for adapter
Remarks: 1. If the temperature of the bearing increases to over 50°C and conditions associated with a variety ofabnormalities such as vibration or impact occur, it is necessary to set the tightening torque to values near the
maximum.
2. If the bearing radial clearance becomes negative by tightening the nut, bearings with appropriate initialclearance must be selected.
3. Value indicated below are the value in condition of a bearing with no any load.
1)

UK200+H2300X
Bearing
nominalnumber
UK205+H2305X

For radial load Cr / 4
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
20
40
5 to 10

For radial load Cr / 13
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
15
30
4 to 8Bearing
dynamic rated
loads
Cr (kN)
14

UK206+H2306X

30

60

7 to 1420

40

4 to 8UK207+H2307X

50

100

8 to 1630

60

5 to 1019.6
25.9

UK208+H2308X

60

120

8 to 1640

80

6 to 1229.3

UK209+H2309X

60

120

9 to 1840

80

6 to 1233

UK210+H2310X

75

150

10 to 20

50

100

7 to 1435.5

UK211+H2311X

105

210

11 to 2270

140

7 to 1443

UK212+H2312X

145

290

12 to 24100

200

8 to 1652.5
57.5

UK213+H2313X

165

330

13 to 26110

220

9 to 18

UK215+H2315X

185

370

15 to 30130

260

10 to 2066

UK216+H2316X

235

470

15 to 30160

320

10 to 2072.5

UK217+H2317X

300

600

16 to 32

205

410

11 to 2283.5

UK218+H2318X

360

720

17 to 34245

490

12 to 2495.5

2)UKX00+H2300X
Bearing
nominalnumber
UKX05+H2305X

For radial load Cr / 4
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
35
70
6 to 12For radial load Cr / 13
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
20
40
4 to 8Bearing
dynamic rated
loads
Cr (kN)
19.6

UKX06+H2306X

50

100

7 to 1435

70

5 to 10

25.9

UKX07+H2307X

60

120

8 to 1640

80

5 to 10

29.3

UKX08+H2308X

75

150

9 to 1850

100

6 to 1233

UKX09+H2309X

90

180

10 to 2060

120

6 to 12

35.5

UKX10+H2310X

120

240

11 to 2280

160

7 to 14

43

UKX11+H2311X

155

310

12 to 24105

210

8 to 16

52.5

UKX12+H2312X

180

360

13 to 26120

240

8 to 16

57.5

UKX13+H2313X

240

480

14 to 28165

330

9 to 18

62

UKX15+H2315X

280

560

15 to 30

195

390

10 to 20

72.5

UKX16+H2316X

340

670

16 to 32230

460

11 to 22

83.5

UKX17+H2317X

420

840

17 to 34280

560

11 to 22

95.5

UKX18+H2318X

480

960

18 to 36320

650

12 to 24

109

UKX20+H2320X

680

1350

20 to 40460

910

13 to 26

134

16

3)

UK300+H2300X
Bearing
nominalnumberUK305+H2305X

For radial load Cr / 4
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
30
60
6 to 12For radial load Cr / 13
Tightening torque
Reduced amount(N•m)
in radial clearance
(µm)
Min
Max
20
40
4 to 8Bearing
dynamic rated
loads
Cr (kN)
21.3

UK306+H2306X

45

90

7 to 1430

60

5 to 10UK307+H2307X

60

120

8 to 1640

80

5 to 1026.8
33.5

UK308+H2308X

80

160

9 to 1855

110

6 to 1240.5

UK309+H2309X

110

220

10 to 2075

150

7 to 1451.5

UK310+H2310X

155

300

11 to 22100

200

7 to 1461.5

UK311+H2311X

190

370

12 to 24125

250

8 to 1671.5

UK312+H2312X

230

450

13 to 26155

310

9 to 1881.5
92.5

UK313+H2313X

270

530

14 to 28180

360

10 to 20

UK315+H2315X

380

740

16 to 32255

510

11 to 22114

UK316+H2316X

450

880

17 to 34300

600

11 to 22123

UK317+H2317X

530

1000

18 to 36360

710

12 to 24

132

UK318+H2318X

620

1200

18 to 36410

820

12 to 24

143

UK319+H2319X

720

1400

19 to 38480960

13 to 26

153

UK320+H2320X

880

1700

20 to 40

590

1200

14 to 28173

UK322+H2322X

1200

2400

22 to 44

820

1650

15 to 30205

UK324+H2324X

1450

2850

22 to 44

1000

2000

15 to 30207

UK326+H2326X

1800

3550

24 to 48

1250

2450

16 to 32229

UK328+H2328X

2150

4200

25 to 50

1450

2950

17 to 34255

17

Tightening angle for an adapter nut
Bearing nominal number

Tightening angle for an adapter nut

Bearing nominal number

UK205

UK305

UK206

UK306

UK207

UK307

UK208

UK308

UK209

60°～90°

UK210

UK310

UK211

UK311
UK312

UK213

UK313

UK215

UK315

UK217

60°～90°

UK309

UK212

UK216

Tightening angle for an adapter nut

90°～120°UK218

90°～120°

UK316
UK317
UK318
UK319
UK320
UK322

120°～150°

UK324
UK326
UK328

Remarks: 1. In time of radial clearance value of a bearing becoming negative by nut tightening, a bearing having suitable
initial clearance must be selected.
2. A Starting point for rotation angle of a nut is the position where a nut is firmly tightened by hand after sleeveand inner ring closely contacted (details are described in the “5)” of the chapter “4. Attaching method”).
3. Value indicated above are the value in condition of a bearing with no any load.

18

Mar.2024