Instruction Manual Insert Bearing Units

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HE13E-003A
Instruction Manual
Insert Bearing Units
(Adapter locking type)
Table of Contents
Page
1. Scope of application .......................................................................................................................................... 1
2. Name of parts and functions ............................................................................................................................. 4
3. Selection of shafts ............................................................................................................................................. 5
4. Attaching method .............................................................................................................................................. 6
5. Installation the covers ....................................................................................................................................... 9
6. Inspection ........................................................................................................................................................ 10
6.1 Noise ........................................................................................................................................................ 10
6.2 Rise of temperature ................................................................................................................................. 10
7. 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
8. Replacement of bearing .................................................................................................................................. 15
Attachment: Adapter recommended tightening torque .......................................................................................... 16
Insert Bearing Units (Adapter locking type)
1
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) and
aggregation 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 this
table.
(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 1.1
Pillow block unit
Square
flange
unit
Round flange
unit with
spigot joint
Rhombic flange unit Take-up 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
UKP209 UKIP209 UKPH209 UKPA209 UKF209 UKFC209 UKFL209 UKFK209 UKFA209 UKT209 UKC209
UKP210 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 UKFX08 UKFCX08 UKFLX08 UKTX08
UKPX09 UKFX09 UKFCX09 UKFLX09 UKTX09
UKPX10 UKFX10 UKFCX10 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 UKFX18 UKFCX18 ― ―
UKPX20 UKFX20 UKFCX20 ― ―
Insert Bearing Units (Adapter locking type)
2
Table 1.3
Pillow block unit Square flange unit
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 UKT308 UKC308
UKP309 ― UKF309 UKFS309 UKFL309 UKT309 UKC309
UKP310 ― 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
UKP319 UKIP319 UKF319 UKFS319 UKFL319 UKT319 UKC319
UKP320 UKIP320 UKF320 UKFS320 UKFL320 UKT320 UKC320
UKP322 UKIP322 UKF322 UKFS322 UKFL322 UKT322 UKC322
UKP324 UKIP324 UKF324 UKFS324 UKFL324 UKT324 UKC324
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) ―
Insert Bearing Units (Adapter locking type)
3
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)
Table 1.6: Units with pressed steel covers
Pillow block unit Square flange unit Round flange unit with spigot joint
Two-bolt
flange unit Take-up unit
UKP205C(E) ― UKF205C(E) UKFC205C(E) UKFL205C(E) UKT205C(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)
Insert Bearing Units (Adapter locking type)
4
2. Name of parts and functions
Insert bearing unit with pressed steel covers
Insert bearing unit with cast-iron covers
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 an interval 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 is convenient 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.
Slinger Prevents dust from intruding by centrifugal force because it is secured to the inner ring and rotates together with the inner ring.
Grease fitting
Housing
Adapter
Outer ring
Steel ball
Inner ring
Retainer
Locking pin
Dowel pin pads
Rubber seal
Slinger
Insert Bearing Units (Adapter locking type)
5
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 are
considered appropriate.
Table 3.1: Shaft dimensional tolerance
Shaft diameter (mm) Shaft dimensional tolerance (μm)
Over Or less h9
18 30 0 to -33
30 50 0 to -39
50 80 0 to -46
80 120 0 to -54
120 180 0 to -63
Insert Bearing Units (Adapter locking type)
6
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”
(http://www.asahiseiko.co.jp/product/technical/movie.html)
1) Slide the adapter sleeve onto the shaft and bring it to the
designated 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)
2) Slide the insert bearing unit onto the shaft and press-fit them with
each other so that the bearing inside diameter surface comes in
close 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
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 4.1: Adapter
(Adapter sleeve, washer and nut from the left)
Fig. 4.1
Fig. 4.2
Photo 4.2
Insert Bearing Units (Adapter locking type)
7
5) Slightly tap the side of the sleeve diameter at the large end to
increase the contact degree of sleeve and inner ring. (Fig. 4.3)
6) Tighten the nut with a hook spanner torque wrench. (Photo 4.4
and 4.5)
If tightening the nut by hitting it using a hammer with jigs (punch,
screwdriver, etc.) at the notched part, be careful not to damage to
the nut.
In addition, tightening the nut excessively may cause the
clearance of the bearing inside to be reduced, resulting in
heat generation and seizing. On the contrary, insufficient
tightening may cause slippage between the shaft and sleeve
or between the sleeve and inner ring, resulting in wear, heat
generation and seizing of slippage surface. Therefore, use
extra caution with regard to the above-mentioned points.
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 match
with 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.
Fig. 4.3
Photo 4.4
Photo 4.5
Photo 4.6
Insert Bearing Units (Adapter locking type)
8
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 is
mounted must have high rigidity and high flatness to
prevent 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 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 the insert bearing unit.
4. The values shown in Tables on the attached sheets 1 and 2 are considered appropriate for the recommended
tightening torque.
5. The values shown in Table 4.1 are considered appropriate for the tightening torque of housing mounting
bolts.
Table 4.1: Tightening torque of housing mounting bolts (reference values)
Bolt nominal
number
Torque
(N・m)
Bolt nominal
number
Torque
(N・m)
Bolt nominal
number
Torque
(N・m)
M5 1.7 to 2.7 M14 38 to 61 M24 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 130 M30 397 to 632
M10 14 to 22 M20 118 to 186 M33 539 to 862
M12 24 to 38 M22 157 to 250 M36 691 to 1107
Inside diameter number Flatness
13 or less
(shaft diameter: Φ60 or less) 0.1mm or less
15 or higher
(shaft diameter: Φ65 or more) 0.15mm or less
Insert Bearing Units (Adapter locking type)
9
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 the
volume of the space inside the covers to that space as shown in
Figs. 5.1 and 5.2.
3) Press-fit the spigot joint of the covers into the spigot joint of the
housing.
4) For cast-iron covers, secure it with hexagon bolts.
5) For pressed steel covers, attach it by tapping the side of the
circumference with a wood hammer or plastic hammer as shown
in Fig. 5.3.
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 and
the shaft surface where the lip part of the rubber seal comes in contact.
Fig. 5.1: For pressed steel covers
Fig. 5.2: For cast-iron covers
Fig. 5.3: Attaching pressed steel covers
Insert Bearing Units (Adapter locking type)
10
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. If the shaft does not rotate smoothly by hand (generation
of excessive torque), incorrect insert bearing unit mounting procedures may have been performed, causing the
adapter 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 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.
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 of
operation and the insert bearing unit reaches to the regular conditions
in general; however, if there are abnormalities in mounting, etc., the
temperature 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.)
Inspect the above items during commissioning and start operating the
insert 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.
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 (Adapter locking type)
11
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 the
same grease as the factory-lubricated grease be used.
Table 7.1: Properties of standard factory-lubricated grease
Type Auxiliary mark Product name
Manufacturer
name
NLGI
No.
Soap-based
grease
Drop point
(°C)
Usable
temperature
point (°C)
Remarks
For general use - Alvania Grease S Showa Shell Sekiyu 3 Li 182 -20 to +135 -
For
heat-resistant
use
HR4
HR5 Super Lube Yuken Kogyo 3 Ca-mixed 300 or more -20 to +200 -
For
low-temperatureresistant use
CR2A AeroShell Grease 7 Showa Shell Sekiyu - (Microgel) Approx. 250 -70 to +150
Equivalent
with the level
between
NLGI No. 1
and 2
For food
machines use
FD
HR20
CLARION ® FOOD
MACHINERYHTEP
GREASE, NO.2
CITGO
Petroleum
Corporation
2 Al-mixed 260 -12 to +163
Remarks: 1. The usable temperature ranges in the
above table are the ranges for the grease.
The usable temperature ranges for the
insert bearing unit are as follows:
2. For heat-resistant specifications, the
bearing radial inside clearance has been
designed to be larger originally; therefore,
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 and
lubrication-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
Type Auxiliary mark
Range of operating
temperature point (°C)
For general use - -15 to +100
For heat-resistant use
HR4 Normal temperature to +120
HR5 Normal temperature to +200
HR23 Normal temperature to +230
For low-temperatureresistant use CR2A -40 to +100
For food machines use
FD -10 to +100
HR20
(heat-resistant) -10 to +150
Insert Bearing Units (Adapter locking type)
12
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 other
foreign materials from getting into the grease to be replenished. If the
grease fitting is contaminated, wipe it off before replenishing.
Grease is injected into the inside of the bearing from the grease hole of
the outer ring through the grease groove provided on the
circumference 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 and
excess grease is discharged from the section between the slinger and
outer ring through the rubber seal lip part. (Photo 7.3, Fig. 7.4)
Re-lubrication should be performed during operation to cause the
grease 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 by
internal pressure acting on the rubber seals on both sides from
the 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.
Photo 7.1: Grease gun
Photo 7.2: Example of filling with a grease gun
Photo 7.3: Normal grease discharging conditions
from inside the bearing
Fig. 7.4: Grease circulation route
Insert Bearing Units (Adapter locking type)
13
* 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 inside
grease increases.
7.3 Grease replenishment amount
The 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 and
slinger as a reference of the replenishment amount. (Photo 7.3)
Table 7.2: Grease replenishment amount Unit: g
Bearing nominal
number
Grease
replenishment
amount
Bearing nominal
number
Grease
replenishment
amount
Bearing nominal
number
Grease
replenishment
amount
UK205 1.4 UKX05 2.2 UK305 3
UK206 2.2 UKX06 3.2 UK306 3.8
UK207 3.2 UKX07 3.9 UK307 5.7
UK208 3.9 UKX08 5 UK308 7.8
UK209 5 UKX09 5.4 UK309 9.4
UK210 5.4 UKX10 7.4 UK310 12.8
UK211 7.4 UKX11 10 UK311 16.4
UK212 10 UKX12 11.8 UK312 21
UK213 11.8 UKX13 13.6 UK313 26
UK215 15.2 UKX15 18.8 UK315 38
UK216 18.8 UKX16 23 UK316 41
UK217 23 UKX17 28 UK317 52
UK218 28 UKX18 33.5 UK318 62
― ― ― ― UK319 73
― ― UKX20 46.5 UK320 92
― ― ― ― UK322 133
― ― ― ― UK324 158
― ― ― ― UK326 194
― ― ― ― UK328 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 not
interfere 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.
Fig. 7.5: Non-contact seal
Insert Bearing Units (Adapter locking type)
14
7.4 Grease replenishment interval
The recommended grease replenishment interval is shown in Table 7.3.
Table 7.3: Grease replenishment interval
Bearing operation
temperature
(℃)
Environment conditions
Very clean Very dirty Very dirty, very humid, much splashing
50 or less 3 years 6 months 3 months
70 1 year 2 months 1 month
100 2.5 months 2 weeks 1 week
120 1.5 months 1 week 3 days
150 2 weeks 3 days Every day
Insert Bearing Units (Adapter locking type)
15
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.
(Photo 8.1)
At this time, ensure that the outer ring locking pin is inserted into the
notched part of housing. Note that forcibly pressing the locking pin
in the bearing seat other than at the notched part may cause outer
ring cranking. (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 to
assemble the bearing so that the grease hole of outer ring is located
near the grease fitting of housing. (Photo 8.3)
Photo 8.1
Photo 8.2
Photo 8.3
Grease hole
of outer ring Grease fitting hole
Notched part
of housing
Grease hole
of outer ring
Locking pin of outer ring
Locking pin
Insert Bearing Units (Adapter locking type)
16
Attachment: Adapter recommended tightening torque
Remarks: 1. The values in the columns in the table for heavy loads are for radial loads of Cr/4 and the values in the
columns for normal loads are for radial loads of Cr/13.
2. If the temperature of the bearing increases to over 50°C and conditions associated with a variety of
abnormalities such as vibration or impact occur, it is necessary to set the tightening torque to values near the
maximum.
3. If the bearing radial clearance becomes negative by tightening the nut, bearings with appropriate initial
clearance must be selected.
1) UK200+H2300X
Bearing
nominal
number
In case of heavy loads In case of regular loads Bearing
dynamic rated
loads
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm)
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm) Min Max Min Max Cr (kN)
UK205+H2305X 20 40 5 to 10 15 30 4 to 8 14
UK206+H2306X 30 60 7 to 14 20 40 4 to 8 19.6
UK207+H2307X 50 100 8 to 16 30 60 5 to 10 25.9
UK208+H2308X 60 120 8 to 16 40 80 6 to 12 29.3
UK209+H2309X 60 120 9 to 18 40 80 6 to 12 33
UK210+H2310X 75 150 10 to 20 50 100 7 to 14 35.5
UK211+H2311X 105 210 11 to 22 70 140 7 to 14 43
UK212+H2312X 145 290 12 to 24 100 200 8 to 16 52.5
UK213+H2313X 165 330 13 to 26 110 220 9 to 18 57.5
UK215+H2315X 185 370 15 to 30 130 260 10 to 20 66
UK216+H2316X 235 470 15 to 30 160 320 10 to 20 72.5
UK217+H2317X 300 600 16 to 32 205 410 11 to 22 83.5
UK218+H2318X 360 720 17 to 34 245 490 12 to 24 95.5
2) UKX00+H2300X
Bearing
nominal
number
In case of heavy loads In case of regular loads Bearing
dynamic rated
loads
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm)
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm) Min Max Min Max Cr (kN)
UKX05+H2305X 35 70 6 to 12 20 40 4 to 8 19.6
UKX06+H2306X 50 100 7 to 14 35 70 5 to 10 25.9
UKX07+H2307X 60 120 8 to 16 40 80 5 to 10 29.3
UKX08+H2308X 75 150 9 to 18 50 100 6 to 12 33
UKX09+H2309X 90 180 10 to 20 60 120 6 to 12 35.5
UKX10+H2310X 120 240 11 to 22 80 160 7 to 14 43
UKX11+H2311X 155 310 12 to 24 105 210 8 to 16 52.5
UKX12+H2312X 180 360 13 to 26 120 240 8 to 16 57.5
UKX13+H2313X 240 480 14 to 28 165 330 9 to 18 62
UKX15+H2315X 280 560 15 to 30 195 390 10 to 20 72.5
UKX16+H2316X 340 670 16 to 32 230 460 11 to 22 83.5
UKX17+H2317X 420 840 17 to 34 280 560 11 to 22 95.5
UKX18+H2318X 480 960 18 to 36 320 650 12 to 24 109
UKX20+H2320X 680 1350 20 to 40 460 910 13 to 26 134
Insert Bearing Units (Adapter locking type)
17
3) UK300+H2300X
Bearing
nominal
number
In case of heavy loads In case of regular loads Bearing
dynamic rated
loads
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm)
Tightening torque
(N•m)
Reduced amount
in radial clearance
(µm) Min Max Min Max Cr (kN)
UK305+H2305X 30 60 6 to 12 20 40 4 to 8 21.3
UK306+H2306X 45 90 7 to 14 30 60 5 to 10 26.8
UK307+H2307X 60 120 8 to 16 40 80 5 to 10 33.5
UK308+H2308X 80 160 9 to 18 55 110 6 to 12 40.5
UK309+H2309X 110 220 10 to 20 75 150 7 to 14 51.5
UK310+H2310X 155 300 11 to 22 100 200 7 to 14 61.5
UK311+H2311X 190 370 12 to 24 125 250 8 to 16 71.5
UK312+H2312X 230 450 13 to 26 155 310 9 to 18 81.5
UK313+H2313X 270 530 14 to 28 180 360 10 to 20 92.5
UK315+H2315X 380 740 16 to 32 255 510 11 to 22 114
UK316+H2316X 450 880 17 to 34 300 600 11 to 22 123
UK317+H2317X 530 1000 18 to 36 360 710 12 to 24 132
UK318+H2318X 620 1200 18 to 36 410 820 12 to 24 143
UK319+H2319X 720 1400 19 to 38 480 960 13 to 26 153
UK320+H2320X 880 1700 20 to 40 590 1200 14 to 28 173
UK322+H2322X 1200 2400 22 to 44 820 1650 15 to 30 205
UK324+H2324X 1450 2850 22 to 44 1000 2000 15 to 30 207
UK326+H2326X 1800 3550 24 to 48 1250 2450 16 to 32 229
UK328+H2328X 2150 4200 25 to 50 1450 2950 17 to 34 255

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