Eagle EVR User manual

Doc. No. 06ME-024E-8
Stern tube bearing
INSTRUCTION
MANUAL
Type EVR
■Thank you very much for buying our EVR stern tube bearing this time.
■Please read this instruction manual carefully before use, and then use it correctly.
■Please keep this instruction manual at hand so that it is always available for reference.

－1－
[A] Specific Features
1. Combination of Advantages of Reinforced Plastic with Those of Elastomer
The outer shell is made of reinforced plastic formed with glass cloth (=GRP) or cotton cloth (=CRP), and the
sliding face is made of elastomer. Therefore, it is of high adhesive property, excellent corrosion resistance
and light weight.
2. Outstanding Durability and Stable Performance
Shaft load is balanced by high elasticity of rubber and increased coverage area to avoid concentrated load in
the aft end.
3. Effective Absorption of shaft vibration
With the unique features of rubber, the EVR absorbs shaft vibration and prevents premature wear down of
components.
4. Prevention of Electrolytic Corrosion on the Shaft Sleeve
Since the construction materials are non-conducting, EVR bearing cuts the corrosive electric current from
the shaft sleeve and prevents the shaft sleeve surface from getting sough.
5. Easy Handling
The handling is very easier at light weight than metal materials.
After inserted it in the stern tube, it fits to the stern tube by the imbibition of the outer shell. Therefore, it
can insert to the stern tube by clearance fit. It is not necessary to press fit, and easier.
[B] Handling
Be careful about the following, and handle it until insert to stern tube.
1. Avoid the leaving under direct rays of the sun and the high temperature. And keep it indoors so that it is not
polluted by rain and sludge.
2. Protect it with the vinyl sheet to prevent the alien substance mixture and the paint adhesion.
3. Do not adherence the solvent, the grease and the oil to the Rubber.
4. Do not give a shock during the transportation and storage.
5. Be standing as possible other than transportation.
6. Do not put the thing on the top of EVR.
7. The hue of outer shell may change with progress of the time. But, in product properties, does not have any
problem in performance.

－2－
[C] Finish cutting
Cutting it according to the following, when in the case of outer diameter has adjustment thickness.
(Note : Do not machine the inside diameter.)
1. Kind of bits
Use harder kind of bites (JIS K03～K05 or equivalent) for the cast iron.
2. Cutting condition
Decide a cutting condition in reference to Table-1.
3. Temperature
Keep the surface temperature of a bearing less than 50℃by adjusting the cutting speed or quantity if
necessary.
4. About chucking
Be careful of chucking of a bearing because it is easy to deform due to its elasticity.
5. About chips (GRP)
Flush a bearing with water sometime and wear a protective mask while machining because glass powder is
contained in chips.
Head stock Tool slide
EVR Rubber bearing Jig
Tail stock
Table-1
Unit GRP CRP
(1)Cutting
quantity
Rough machining mm 1.0～2.0(Max.3.0) at a diameter
Final machining 0.5～1.0 at a diameter
(2)Cutting
speed
Rough machining m/min 120～150 120～250
Final machining
(3)Feeding
speed
Rough machining mm/rpm 0.2～0.3
Final machining 0.1～0.2 0.2～0.25

－3－
[D] Installation
1. Attention of installation
(1) The stern tube washes it enough, and confirms that there is not an alien substance.
(2) Confirm the "TOP" marking of the bearing.
(3) Apply a thin coat of lubricating oil or grease to the inner wall of the bearing cases and to the outside
surfaces of the bearing shell. Then, insert the bearing by applying a pressure.
(4) Do not hammer the bearing directly, but use a suitable protective adapter or wood where needed.
2. Fixing method
(1) Flange type
Fix it to the bulkhead with the Hex head bolts.
Note) Do the looseness prevention wires to the bolts.
(2) Straight type
Fix it to the stern tube as shown below. It is different from the flange type.
①When fixing it on an aft (or fwd) end side.
②When fixing it on an outer side.
Bearing I.D.
ID (mm)
Qty
N
Size
M
Length
L (mm)
Position
A (mm)
～150 4 M10 15 3
150～200 4 M12 20 3
200～250 4 M16 20 5
250～300 4 M16 25 5
300～400 4 M16 30 5
400～500 4 M16 30 5
500～ 4 M20 35 6
Note) Do the looseness prevention to the set screws.
Table-2 List of Set screw (Reference)
Table-3 Quantity of Set screw (Reference)
Bearing length
L (mm)
Partition
coefficient
M1
Qty
(One side)
Nb
～99 2 1
100～199 3 2
200～499 4 2
500～999 6 3
1000～8 4
Note) Refer to the Table-2 above for the size of set screw.
Fix the set screw to both sides (Except top and bottom) of the bearing.
Fix the set screw on the length direction at equal intervals.

－4－
3. Attention of inserting
(1) Before inserting the shaft, wet the bearing inside and shaft sleeve surfaces with a soap solution or water
(sea water) to ensure smooth insertion.
(2) When insert a shaft, work carefully so that a shaft end does not bump on the bearing side.
(3) Do not use of oil and grease they will result in swelling and deterioration of the bearing inside and also in
poor lubrication during operation.
[E] During operation
1. Check the valve, cock, pressure gauge and likes for the equipment before operation.
2. During propeller shaft operation, keep feeding an optimum amount of cooling water to rubber bearing.
<Optimum amount of cooling water >
(6～7)Ds2x 10-3 [m3/h.]
Ds：Shaft sleeve diameter [cm]
Note) The bearing must not be operated in dry condition.
3. The cooling water temperature for the bearing must be held as low as the outboard sea water temperature.
Even when it is inevitable to use warmed sea water, the water temperature must be below 45℃and it is
necessary to feed the water at a greater flow rate 30 to 40% than the specified.
4. In the event of abnormal amount of supply water, immediately stop or reduce the propeller shaft speed. Then,
check the pipe line.

－5－
[F] Replacement
1. Replacement standard
(1) When shaft vibration was encouraged by increase of bearing clearance.
(2) When the rubber of the bearing was locally worn.
(3) When the contact face of the shaft was harmful damaged or worn mark.
(4) When rubber of the bearing was burned or badly peeled.
(5) When bearing clearance exceeds Table-4. But, must not it use to exceed the clearance of the regulation
by each ship's register.
Table-4
Propeller shaft dia
(mm)
Shaft sleeve dia
(mm)
Bearing
Type
Bearing Clearance
(mm)
Maximum Standard
40 ～70 - 40 ～70 2.5 0.4～0.7
71 ～100 - 70 ～100 3.0 0.5～0.8
101 ～120 127 ～146 100 ～145 3.5 0.6～0.8
121 ～170 147 ～200 145 ～200 4.0 0.6～1.1
171 ～230 201 ～265 200 ～265 4.5 0.8～1.2
231 ～305 266 ～347 265 ～350 5.0 0.9～1.4
306 ～380 348 ～427 350 ～425 5.5 1.0～1.5
381 ～450 428 ～503 425 ～500 6.0 1.1～1.5
451 ～500 504 ～557 500 ～550 6.5 1.1～1.6

－6－
2. Pulling out of bearing –Flange type-
(1) In case of flange with jack up screws
Carry out by using jack up bolts as shown below.
(2) In case of flange without jack up screws
Carry out by using jack as shown below.
(3) In case of difficulty in pulling out
In case of difficulty in pulling out on the above methods, carry out by the following methods.
①Make a slit axially at the both grooves of a bearing stave by using a grinder or something. Then,
split the slits with a cold chisel or something.
②Cool the bearing down with Dry ice or something.
Jack up bolts
Jack up screws
Jack

－7－
3. Pulling out of bearing –Straight type-
(1) In case of flange with jack up screws
Carry out by using jack up bolts as shown below.
(2) In case of flange without jack up screws
Carry out by using jack as shown below.
(3) In case of difficulty in pulling out
In case of difficulty in pulling out on the above methods, carry out by the following methods.
①Make a slit axially at the both grooves of a bearing stave by using a grinder or something. Then,
split the slits with a cold chisel or something.
②Cool the bearing down with Dry ice or something.
Jack up screws
Jack up bolts
Jack