HE13E-002D

Instruction Manual
Insert Bearing Units(Set-screws locking type)Table of Contents
Page

1.

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

2.

Name of parts and functions .............................................................................................................................4

3.

Types of set-screws and nominal number........................................................................................................54.

Selection of shafts .............................................................................................................................................6
4.1

Shaft dimensional tolerance ......................................................................................................................6

4.2

Mounting shaft ...........................................................................................................................................7

5.

Mounting method ..............................................................................................................................................86.

Installation the covers .......................................................................................................................................97.

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

8.

9.

7.1

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

7.2

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

Lubrication ....................................................................................................................................................... 11
8.1

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

8.2

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

8.3

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

8.4

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

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

Insert Bearing Units (Set-screws locking type)

1. Scope of application
This instruction manual applies to the insert bearing units shown in Tables 1.1 to 1.6.
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 to 1.6.
(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

UCP201―

UCPH201

UCPA201

UCF201

UCFC201

UCFL201

UCFK201

UCFA201

UCT201

UCC201

UCP202―

UCPH202UCPA202

UCF202

UCFC202

UCFL202

UCFK202

UCFA202

UCT202

UCC202

UCP203―

UCPH203

UCPA203

UCF203

UCFC203

UCFL203

UCFK203

UCFA203

UCT203

UCC203

UCP204―

UCPH204

UCPA204

UCF204

UCFC204

UCFL204

UCFK204

UCFA204

UCT204

UCC204

UCP205―

UCPH205

UCPA205

UCF205

UCFC205

UCFL205

UCFK205

UCFA205

UCT205

UCC205

UCP206―

UCPH206

UCPA206

UCF206

UCFC206

UCFL206

UCFK206

UCFA206

UCT206

UCC206

UCP207―

UCPH207

UCPA207

UCF207

UCFC207

UCFL207

UCFK207

UCFA207

UCT207

UCC207

UCP208

UCIP208

UCPH208

UCPA208

UCF208

UCFC208

UCFL208

UCFK208

UCFA208

UCT208

UCC208

UCP209

UCIP209

UCPH209

UCPA209

UCF209

UCFC209

UCFL209

UCFK209

UCFA209

UCT209UCC209UCP210

UCIP210UCPH210

UCPA210

UCF210

UCFC210

UCFL210UCFK210

UCFA210

UCT210

UCC210

UCP211

UCIP211――

UCF211

UCFC211

UCFL211―

UCFA211

UCT211

UCC211

UCP212

UCIP212――

UCF212

UCFC212

UCFL212――

UCT212

UCC212

UCP213

UCIP213――

UCF213

UCFC213

UCFL213――

UCT213

UCC213

UCP214―――

UCF214

UCFC214

UCFL214――

UCT214―

UCP215―――

UCF215

UCFC215

UCFL215――

UCT215―

UCP216―――

UCF216

UCFC216

UCFL216――

UCT216―

UCP217―――

UCF217

UCFC217

UCFL217――

UCT217―

UCP218―――

UCF218

UCFC218

UCFL218

―

―

―

―

Table 1.2
Pillow block unit

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

Hanger unit

UCPX05

UCFX05UCFCX05

UCFLX05

UCTX05UCECH201

UCPX06

UCFX06UCFCX06

UCFLX06

UCTX06UCECH202

UCPX07

UCFX07UCFCX07

UCFLX07

UCTX07UCECH203

UCPX08

UCFX08UCFCX08

UCFLX08

UCTX08UCECH204

UCPX09

UCFX09UCFCX09

UCFLX09

UCTX09UCECH205

UCPX10

UCFX10UCFCX10UCFLX10

UCTX10UCECH206

UCPX11

UCFX11UCFCX11―

UCTX11UCECH207

UCPX12

UCFX12UCFCX12―UCTX12UCECH208

UCPX13

UCFX13

UCFCX13―

UCTX13UCECH209

UCPX14

UCFX14UCFCX14―

UCTX14UCECH210

UCPX15

UCFX15UCFCX15―

UCTX15UCECH211

UCPX16

UCFX16UCFCX16―

UCTX16UCECH212

UCPX17

UCFX17UCFCX17―

UCTX17UCECH213

UCPX18UCFX18UCFCX18――

UCECH215

UCPX20

UCFX20UCFCX20

―

―

―

1

Insert Bearing Units (Set-screws locking type)

Table 1.3
Pillow block unit

Square flangeunit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

Cartridge unit

UCP305―

UCF305

UCFS305

UCFL305

UCT305

UCC305

UCP306―

UCF306

UCFS306

UCFL306

UCT306

UCC306

UCP307―

UCF307

UCFS307

UCFL307

UCT307

UCC307

UCP308―

UCF308

UCFS308

UCFL308

UCT308UCC308UCP309―UCF309UCFS309

UCFL309

UCT309UCC309UCP310―

UCF310

UCFS310

UCFL310

UCT310

UCC310

UCP311―

UCF311

UCFS311

UCFL311

UCT311

UCC311

UCP312―

UCF312

UCFS312

UCFL312

UCT312

UCC312

UCP313

UCIP313

UCF313

UCFS313

UCFL313

UCT313

UCC313

UCP314

UCIP314

UCF314

UCFS314

UCFL314

UCT314

UCC314

UCP315

UCIP315

UCF315

UCFS315

UCFL315

UCT315

UCC315

UCP316

UCIP316

UCF316

UCFS316

UCFL316

UCT316

UCC316

UCP317

UCIP317

UCF317

UCFS317

UCFL317

UCT317

UCC317

UCP318

UCIP318

UCF318

UCFS318

UCFL318

UCT318UCC318UCP319

UCIP319

UCF319UCFS319

UCFL319

UCT319UCC319UCP320

UCIP320

UCF320

UCFS320

UCFL320

UCT320

UCC320

UCP321―

UCF321

UCFS321

UCFL321

UCT321

UCC321

UCP322

UCIP322

UCF322

UCFS322

UCFL322

UCT322

UCC322

UCP324

UCIP324

UCF324

UCFS324

UCFL324

UCT324

UCC324

UCP326

UCIP326

UCF326

UCFS326

UCFL326

UCT326

UCC326

UCP328

UCIP328

UCF328

UCFS328

UCFL328

UCT328

UCC328

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
CUCT201C(CE)CUCP201C(CE)―CUCF201C(CE)

CUCFC201C(CE)CUCFL201C(CE)CUCP202C(CE)―CUCF202C(CE)

CUCFC202C(CE)CUCFL202C(CE)CUCT202C(CE)CUCP203C(CE)―CUCF203C(CE)

CUCFC203C(CE)CUCFL203C(CE)CUCT203C(CE)CUCP204C(CE)―CUCF204C(CE)

CUCFC204C(CE)CUCFL204C(CE)CUCT204C(CE)CUCP205C(CE)―CUCF205C(CE)

CUCFC205C(CE)CUCFL205C(CE)CUCT205C(CE)CUCP206C(CE)―CUCF206C(CE)

CUCFC206C(CE)CUCFL206C(CE)CUCT206C(CE)CUCP207C(CE)―CUCF207C(CE)

CUCFC207C(CE)CUCFL207C(CE)CUCT207C(CE)CUCP208C(CE)CUCIP208C(CE)CUCF208C(CE)

CUCFC208C(CE)CUCFL208C(CE)CUCT208C(CE)CUCP209C(CE)CUCIP209C(CE)CUCF209C(CE)

CUCFC209C(CE)CUCFL209C(CE)CUCT209C(CE)CUCP210C(CE)CUCIP210C(CE)CUCF210C(CE)

CUCFC210C(CE)CUCFL210C(CE)CUCT210C(CE)CUCP211C(CE)CUCIP211C(CE)CUCF211C(CE)

CUCFC211C(CE)CUCFL211C(CE)CUCT211C(CE)CUCP212C(CE)CUCIP212C(CE)CUCF212C(CE)

CUCFC212C(CE)CUCFL212C(CE)CUCT212C(CE)CUCP213C(CE)CUCIP213C(CE)CUCF213C(CE)

CUCFC213C(CE)CUCFL213C(CE)CUCT213C(CE)CUCP214C(CE)―CUCF214C(CE)

CUCFC214C(CE)CUCFL214C(CE)CUCT214C(CE)CUCP215C(CE)―CUCF215C(CE)

CUCFC215C(CE)CUCFL215C(CE)CUCT215C(CE)CUCP216C(CE)―CUCF216C(CE)

CUCFC216C(CE)CUCFL216C(CE)CUCT216C(CE)CUCP217C(CE)―CUCF217C(CE)

CUCFC217C(CE)CUCFL217C(CE)CUCT217C(CE)CUCP218C(CE)―CUCF218C(CE)

CUCFC218C(CE)CUCFL218C(CE)―2Insert Bearing Units (Set-screws locking type)

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

CUCP305C(CE)―CUCF305C(CE)CUCFS305C(CE)CUCFL305C(CE)CUCT305C(CE)CUCP306C(CE)―CUCF306C(CE)CUCFS306C(CE)CUCFL306C(CE)CUCT306C(CE)CUCP307C(CE)―CUCF307C(CE)CUCFS307C(CE)CUCFL307C(CE)CUCT307C(CE)CUCP308C(CE)―CUCF308C(CE)CUCFS308C(CE)CUCFL308C(CE)CUCT308C(CE)CUCP309C(CE)―CUCF309C(CE)CUCFS309C(CE)CUCFL309C(CE)CUCT309C(CE)CUCP310C(CE)―CUCF310C(CE)CUCFS310C(CE)CUCFL310C(CE)CUCT310C(CE)CUCP311C(CE)―CUCF311C(CE)CUCFS311C(CE)CUCFL311C(CE)CUCT311C(CE)CUCP312C(CE)―CUCF312C(CE)CUCFS312C(CE)CUCFL312C(CE)CUCT312C(CE)CUCT313C(CE)CUCP313C(CE)CUCIP313C(CE)CUCF313C(CE)CUCFS313C(CE)CUCFL313C(CE)CUCP314C(CE)CUCIP314C(CE)CUCF314C(CE)CUCFS314C(CE)CUCFL314C(CE)CUCT314C(CE)CUCP315C(CE)CUCIP315C(CE)CUCF315C(CE)CUCFS315C(CE)CUCFL315C(CE)CUCT315C(CE)CUCP316C(CE)CUCIP316C(CE)CUCF316C(CE)CUCFS316C(CE)CUCFL316C(CE)CUCT316C(CE)CUCP317C(CE)CUCIP317C(CE)CUCF317C(CE)CUCFS317C(CE)CUCFL317C(CE)CUCT317C(CE)CUCP318C(CE)CUCIP318C(CE)CUCF318C(CE)CUCFS318C(CE)CUCFL318C(CE)CUCT318C(CE)CUCP319C(CE)CUCIP319C(CE)CUCF319C(CE)CUCFS319C(CE)CUCFL319C(CE)CUCT319C(CE)CUCP320C(CE)CUCIP320C(CE)CUCF320C(CE)CUCFS320C(CE)CUCFL320C(CE)CUCT320C(CE)CUCP321C(CE)―CUCF321C(CE)CUCFS321C(CE)CUCFL321C(CE)CUCT321C(CE)CUCP322C(CE)CUCIP322C(CE)CUCF322C(CE)CUCFS322C(CE)CUCFL322C(CE)CUCT322C(CE)CUCP324C(CE)CUCIP324C(CE)CUCF324C(CE)CUCFS324C(CE)CUCFL324C(CE)CUCT324C(CE)CUCP326C(CE)CUCIP326C(CE)CUCF326C(CE)CUCFS326C(CE)CUCFL326C(CE)CUCT326C(CE)CUCP328C(CE)CUCIP328C(CE)CUCF328C(CE)CUCFS328C(CE)CUCFL328C(CE)CUCT328C(CE)

Square flange unit

Round flange unit
with spigot joint

Two-bolt
flange unit

Take-up unit

Table 1.6: Units with pressed steel covers
Pillow block unit
UCP201C(E)―UCF201C(E)UCFC201C(E)UCFL201C(E)

UCT201C(E)UCP202C(E)―UCF202C(E)UCFC202C(E)UCFL202C(E)UCT202C(E)UCP203C(E)―UCF203C(E)UCFC203C(E)UCFL203C(E)

UCT203C(E)UCP204C(E)―UCF204C(E)UCFC204C(E)UCFL204C(E)UCT204C(E)UCP205C(E)―UCF205C(E)UCFC205C(E)UCFL205C(E)UCT205C(E)UCP206C(E)―UCF206C(E)UCFC206C(E)UCFL206C(E)UCT206C(E)UCP207C(E)―UCF207C(E)UCFC207C(E)UCFL207C(E)UCT207C(E)UCP208C(E)UCIP208C(E)UCF208C(E)UCFC208C(E)UCFL208C(E)UCT208C(E)UCP209C(E)UCIP209C(E)UCF209C(E)UCFC209C(E)UCFL209C(E)UCT209C(E)UCP210C(E)UCIP210C(E)UCF210C(E)UCFC210C(E)UCFL210C(E)UCT210C(E)UCP211C(E)

UCIP211C(E)UCF211C(E)UCFC211C(E)UCFL211C(E)

UCT211C(E)UCP212C(E)UCIP212C(E)UCF212C(E)UCFC212C(E)UCFL212C(E)UCT212C(E)UCP213C(E)UCIP213C(E)UCF213C(E)UCFC213C(E)UCFL213C(E)UCT213C(E)3Insert Bearing Units (Set-screws locking type)

2. Name of parts and functions
Rubber seal
Slinger

Grease fitting
Outer ring
Housing

Steel ballSet-screws

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.

Set-screws

Secures the insert bearing and 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.

4Insert Bearing Units (Set-screws locking type)

3. Types of set-screws and nominal number
Three type set-screws are available for various applications as shown in Fig. 3.1. SW type is ASAHI standard set-screws
and performs certain fixing force of insert ball bearing units to shaft. Other two types contribute to requirements which SW
type cannot meet though shaft must be partly pre-machined; SC type is capable of more preventing sliding between bearing
units and shaft while SH type can allow bearing units to flee flexibly from expansion/contraction of shaft in axial direction.

SW typeSC typeSH typeFig. 3.1

5Insert Bearing Units (Set-screws locking type)

4. Selection of shafts
4.1 Shaft dimensional tolerance
Clearance fit “h” is normally applied for the dimensional tolerance between bearing inner rings and spherical in side diameterof housing. The values shown in Table 4.1 are considered appropriate for the shaft dimensional tolerance in the case ofloose press-fitting.
When using flat tip set-screw (SH type), h7/h8 (when using carbon steel) shown in Table 4.1 are appropriate as the shaft
dimensional tolerance.
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 4.2. For such tight fit between the bearing and the shaft, theinitial bearing internal clearance must be larger than its standard clearance.
Table 4.1: Shaft dimensional tolerance (for loose press-fitting)
Shaft diameter (mm)Over

Shaft dimensional tolerance (μm)

Or less

js7

h7

h8

10

18

±9

0 to -18

0 to -27

18

30

±10.5

0 to -21

0 to -33

30

50

±12.5

0 to -25

0 to -39

50

80

±15

0 to -30

0 to -46

80

120

±17.5

0 to -35

0 to -54

120

180

±20

0 to -40

0 to -63

Remarks: In general, js7 shall be applied.
Table 4.2: Shaft dimensional tolerance (for tight press-fitting)
Shaft diameter (mm)Shaft dimensional tolerance (μm)

Over

Or less

n6

n7

m6

m7

10

18

+23 to +12+30 to +12+18 to +7+25 to +7

1830+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 +11

80

120

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

120

180

+52 to +27+67 to +27+40 to +15+55 to +15

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

6

Insert Bearing Units (Set-screws locking type)

4.2 Mounting shaft
For the shaft on which the Insert bearing unit is mounted, use one that is not bent and does not have burrs, and conduct
chamfering of the shaft end. When using SW type set-screws, the shaft contact point for the set-screws should be ground as
shown in Fig. 4.1 or hollowed using a drill as shown in Fig. 4.2 so that the tip of the set-screws is sunk slightly below thesurface of the shaft before tightening. For shafts subject to vibrations and shock or large axial loads, use a shouldered shaft
and tighten it with nuts as shown in Fig.4.4.
When using SC type set-screws, it is necessary to provide a drilled hole so that the tip of the cone point set-screws is sunk.
The SC type set-screws for respective nominal numbers are given as shown in Table 4.3.
In case of using SH type set-screws, it is necessary to provide a slot on the shaft as shown in Fig. 4.3 and dimension ofgroove are given as shown in Table 4.4.
For above-mentioned drilled hole/slot when a set of two set-screws of SC/SH type in a bearing unit, it is recommended thatmachining is made at corresponding points with actual positions of the set-screws attached to the unit.

Fig. 4.1

Fig. 4.2

Fig. 4.3

Table 4.3: Tip dimension of SC type set-screws
Bearing nominal number

Unit: mm
Dimension “a”

UC201 to 206

UCX05

UC305, 306

UC207 to 209

UCX06 to X08

UC307

3

UC210 to 213

UCX09 to X12

UC308, 309

3.5

UC214 to 218

UCX13 to X17

UC310 to 314

4.5

－

UCX18

UC315, 316

5

－

UCX20

UC317 to 319

6

－

－

UC320 to 324

6.5

－

－

UC326, 328

7

2.5

Table 4.4: Shaft groove dimensions for SH type set-screws
Bearing
nominalnumberh(min.)b(min.)

Fig. 4.4

Bearing
nominalnumberh(min.)b(min.)

Unit: mm
Bearing
nominalnumberh(min.)b(min.)

UC201

3

5

UC305

3.5

5

UC X05

4

5

UC202

3.5

5

UC306

4

5

UC X06

4.5

7

UC203

3.5

5

UC307

4.5

7

UC X07

4.5

7

UC204

3.5

5

UC308

5

8

UC X08

5

7

UC205

4

5

UC309

5

8

UC X09

5

8

UC206

4.8

5

UC310

5

10

UC X10

4

8

UC207

4.5

7

UC311

5.5

10

UC X11

4.5

8

UC208

4.5

7

UC312

5

10

UC X12

4.5

8

UC209

5

7

UC313

6.5

10

UC X13

5

10

UC210

5

8

UC314

5.5

10

UC X14

5.5

10

UC211

5.5

8

UC315

7.5

11

UC X15

6.5

10

UC212

5.5

8

UC316

6.5

11

UC X16

7

10

UC213

5.5

8

UC317

7.5

13

UC X17

6.5

10

UC214

6.5

10

UC318

8.5

13

UC X18

6.5

11

UC215

7

10

UC319

8

13

UC X20

8

13

14

UC216

7

10

UC320

8

UC217

8

10

UC321

7

14

UC218

7.5

10

UC322

9.5

14

UC324

8

14

UC326

9.5

16

UC328

8

16

7

Insert Bearing Units (Set-screws locking type)

5. Mounting method
1) Slide the insert bearing unit onto the shaft slowly and bring it to the predetermined position.
2) Mount the insert bearing unit on the machine base and secure it firmly with bolts.
3) Tighten the set-screws by equal force with a hexagonal wrench key to secure the insert bearing unit to the shaft.
Remarks: 1. Before sliding the insert bearing unit onto the shaft, check that the tips of set-screws do not protrude from theinside diameter of bearing. If a tip protrudes, loosen the set-screws.
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 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.
3. The machine base on which the insert bearing unit isInside diameter number

Flatness

13 or less(shaft diameter: Φ65 or less)

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

4. The values shown in Table 5.1 are considered appropriate for the tightening torque.
If the set-screws is tightened excessively, deformation of the inner ring may cause the rotational
accuracy to be reduced and the inner ring to be cracked.
5. The values shown in Table 5.2 are considered appropriate for the tightening torque of housing mounting
bolts.
6. Use washers to prevent the housing from being damaged when fixing the bearing unit on the mounting basewith bolts.
Table 5.1: Appropriate tightening torque of set-screws
Bearing nominal number

Hexagonal wrench key
nominal number

Appropriate tightening torque
(N･m)
3.9

UC201 to 203

UCX05

UC305, 306

3UC204 to 206

－

－

3

4.9

－

UCX06 to X08

－

4

8.3

UC207 to 209

－

UC307

4

11.8

－

UCX09 to X12

－

5

16.2
23.5

UC210 to 213－

UC308,309

5

UC214 to 216－

UC310, 311

6

39.2

UC217, 218

UCX13 to X18

UC312 to 316

6

27.9

－

UCX20

UC317 to 324

8

66.6

－

－

UC326 to 328

10

112.7

Table 5.2: 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

M8

6.9 to 11

M18

81 to 130M30

397 to 632

M10

14 to 22M20

118 to 186

M33

539 to 862

M12

24 to 38

M22

157 to 250

M36

691 to 1107

Insert Bearing Units (Set-screws locking type)

6. 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. 6.1 and 6.2.

Fig. 6.1: For pressed steel covers

3) Press-fit the spigot joint of the covers into the spigot joint of the
housing.

Fig. 6.2: For cast-iron covers

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. 6.3.

Fig. 6.3: Attaching pressed steel covers

Remarks: 1. For a rubber-sealed cover 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

Insert Bearing Units (Set-screws locking type)

7. 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.

7.1 Noise
Touch the housing with a listening rod or screwdriver and listen fornoises during operation to check for abnormalities. (Photo 7.1)
For normal operation conditions, a smooth rotation noise is generated,
but if there is an abnormality in mounting, an abnormal noise may begenerated.

Photo 7.1: Checking the rotation noise with a listening rod

7.2 Rise of temperature
Measure the temperature on the outer circumferences of the bearing
outer ring and housing. (Photos 7.2 and 7.3)
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 7.2: 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 7.3: Temperature measurement (non-contact type)Insert Bearing Units (Set-screws locking type)

8. Lubrication
8.1 Lubrication grease
This insert bearing has been factory-lubricated with the grease shown in Table 8.1. Therefore, it is recommended that thesame grease as the factory-lubricated grease be used.
Table 8.1: 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 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 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. 8.1 to 8.3)

Fig. 8.1: Lubrication type
insert bearing unit
Example of nominal number: UCP205

Fig. 8.2: Lubrication-free type
insert bearing unit (G00 specifications)
Example of nominal number: UCP205G00

Fig. 8.3: Lubrication-free type
insert bearing unit
(Steel-plug filled specifications)
Example of nominal number: UCP205/KU

11

Insert Bearing Units (Set-screws locking type)

8.2 Grease replenishing method
Replenish grease using a grease gun (Photo 8.1) 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 8.1: Grease gun

Photo 8.2: 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 8.3, Fig. 8.4)
Photo 8.3: Normal grease discharging conditions
from inside the bearing

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
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.

12

Fig. 8.4: Grease circulation routeInsert Bearing Units (Set-screws locking type)* Low torque specifications (auxiliary: TAA)
Low-torque specifications are exhibited as “TAA” in which
non-contact type rubber seals (Fig. 8.5) 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. 8.5: Non-contact seal

8.3 Grease replenishment amountThe values shown in Table 8.2 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 8.3)
Table 8.2: Grease replenishment amount
Bearing nominal
number
UC201 to UC204
UC205
UC206
UC207
UC208
UC209
UC210
UC211
UC212
UC213
UC214
UC215
UC216
UC217
UC218
―
―
―
―
―
―
―

Greasereplenishment
amount
1.2
1.4
2.2
3.2
3.9
5
5.4
7.4
10
11.8
13.6
15.2
18.8
23
28
―
―
―
―
―
―
―

Unit: gBearing nominal
number
―
UCX05
UCX06
UCX07
UCX08
UCX09
UCX10
UCX11
UCX12
UCX13
UCX14
UCX15
UCX16
UCX17
UCX18
―
UCX20
―
―
―
―
―

Greasereplenishment
amount
－
2.2
3.2
3.9
5
5.4
7.4
10
11.8
13.6
15.2
18.8
23
28
33.5
―
46.5
―
―
―
―
―

Bearing nominal
number
－
UC305
UC306
UC307
UC308
UC309
UC310
UC311
UC312
UC313
UC314
UC315
UC316
UC317
UC318
UC319
UC320
UC321
UC322
UC324
UC326
UC328

Greasereplenishment
amount
－
3
3.8
5.7
7.8
9.4
12.8
16.4
21
26
31.5
38
41
52
62
73
92
106
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

Insert Bearing Units (Set-screws locking type)

8.4 Grease replenishment interval
The recommended grease replenishment interval is shown in Table 8.3.
Table 8.3: 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

Insert Bearing Units (Set-screws locking type)9. 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 9.1)

Grease holeof outer ring

Locking pin of outer ring
Photo 9.1

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 9.2)

Photo 9.2

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 9.3)

Photo 9.3

15

MEMO

Sep.2023