INSTRUCTION MANUAL
Before handling the machine, this instruction manual should be read through carefully to familiarize
yourselves with contents of the manual.
The machine should be handled by skilled operator. Consideration should be given so that this instruction
manual will reach to the user of this machine. This manual should be kept in file so as to be serviceable atany time.

Before handling this machine, be sure to read this manual and other appendices carefully to familiarize
yourselves with contents of the manual for proper operation. Start on using this machine after having
been well acquainted with all the equipment knowledge, safety information, and cautionary instructions.
The rank of safety precautions is classified into “WARNING” and “CAUTION” in this instruction manual.

WARNING

Where occurrence of dangerous situation such as death or serious injury is
presumable in the case of mishandling.

CAUTION

Where occurrence of dangerous situation such as light injury or only physicaldamage is presumable in the case of mishandling.

Even such matters which full under

CAUTION may possibly lead to serious results depending upon

the circumstances. Be sure to observe the instructions given by

CAUTION where every description

covers important notes.

WARNING* Customers should never make modification to the product, which may cause damage to the productor may cause personal injury.
* Do not use the product in the explosive atmospheres, which may cause explosion, fire or an accident
resulting in injury or death.

CAUTION* Use the product exactly to the specifications, otherwise, damage or personal injury may occur.

WARNING* Such works as transportation, unpacking, grounding, piping, wiring, operation, maintenance / inspection
should be performed by skilled persons with sufficient knowledge.
* Otherwise, electric shock, fire, damage to the product or personal injury may occur.

CAUTION* Do not insert your finger or any other foreign object into the opening of the product, which may cause
electric shock, fire, damage to the product or personal injury.
CAT.NO. JM2001EJM2001E
19.12. abianzza
24.04

Description of coupling parts and type
① ② ⑦

③ ④ ③ ⑧⑤ ⑥
② ①

in order to avoid oil leakage from a part of the keyway, apply aviscous sealing agent or use a sealing tape thereto. In case flat headbolts are used inside the coupling, lock them by caulking or spot
welding after fitting of those.

3. Alignment

The Types GC-SSM and GC-CCM couplings can absorb someamounts of parallel misalignment, angular misalignment and floating
in axial direction. (The Types GC-SEM and GC-CEM couplings,
cannot absorb parallel misalignment in one set.) A large
misalignment, however, will shorten a life of the coupling extremely,
so that pe perform the alignment work in due consideration of theshaft arising from load operation.

Adjustment of parallelalignment

Datum surface foralignment

1. O-ring (for sealing the case end)
2. Coupling case
3. Coupling center
4. O-ring (for sealing case jointing surfaces)
5. Washer
6. Nut
7. Reamer bolt (for fastening the case)
8. Plug
The above figure illustrates the parts of Type GC-SSM Coupling.
Type GC-CCM has a coupling case of a side cover construction inwhich the fitting portion of O-ring ① for the case end of a couplingcase ② is securely fastened to the coupling case with bolts.
Types GC-SEM and GC-CEM are modifications of Types GC-SSM
and GC-CCM, each one side of which is converted into a fixed (rigid)
flange. Types SEM and CEM permit only an angular misalignmentand do not permit any parallel misalignment in one set.
In case a parallel misalignment is required, use two sets of them as
one pair through an intermediate shaft.

Transportation/unpacking
WARNING• When the product is suspended from overhead for the purpose oftransportation, never stand under the product. There is a danger of anaccident resulting in injury or death caused by dropping of the product.

CAUTION• Before lifting the machine, check the machine weight and lifting procedure, and use such hauling tools as are possessed of rated
capacity of lifting not less than the machine weight.
• There is a possible danger of failure and injury caused by falling-offand turnover.
• Unpack the machine after making sure of its top and bottom.
• There is a possible danger of failure and injury caused by turnover.

Method of Fitting
CAUTION
Disassembly/assembly should be performed by skilled persons with
sufficient knowledge (those who well understand the structure andfunction and can carry out the operation properly). Incomplete
operation may cause damage to the product.

1. Cleaning

Before assembling, all parts of the GC coupling should fully bechecked and throughly be cleaned. This is for the purpose ofremoving a rustpreventive agent applied on the coupling andpreventing foreign matters from mingling therein. Be sure to practicethese works also when reas-sembling the parts after disassembling.
Use light oil for cleaning. However, by no means use thinner. beause
it would cause damage to O-ring.

2. Assembling

When fitting the coupling center (or rigid) to the shaft, heat thecoupling center in heated oil or in a soaking pit (up to max. 140˚C), or
cool the shaft in liquid nitrogen, etc., in order to differentiate thetemperatures between the coupling and the shaft.
Then, assemble them with special care not to do damage to them.
(By no means heat the tooth surfaces of the coupling center directlywith flame.)
When assembling them, take care not to forget to put the case,covers and O-ring in place.

Adjustment of angular
misalignment
Fig. 1 Datum surfaces for alignment and method of alignment
Align the shaft centers as accurately as possible by using a dialgauge, thickness gauge or wedged gauge without misalignment on
the batum surfaces (refer to Fig. 1).

4. Fastening of Flange
CAUTION• Do not touch the key groove of shaft end and the acute part of cornerof the machine direct by unarmed hand. There is a possible dangerof suffering injuries.
• When coupling with the companion machine, keep the centering
accuracy within the control value as shown in the instruction manual,drawing, etc. There is a possible danger of failure caused when themachine is used beyond the control value.
• Before coupling with the comp anion machine, check for the directionof rotation. There is a possible danger of failure and injury caused
depending upon the difference in the rotating direction.
• Protect the exposed rotating part with safety cover or the like. Thereis a possible danger of injury caused by entanglement.
O-ring is inserted between the jointing surfaces of the cases, so thatcare must be taken to set the ring in correct place, and fasten thecases with reamer bolts evenly. In this case, assemble them applying
oil to outer circumferences of the coupling center boss and applying
a non-drying non-solvent type liquid packing agent on the jointing
surfaces of O-ring becomes free from damages and the assembly
work will be simplified.
Fitting marks being punched on both cases of the Types GC-CCM
and GC-CEM couplings, check them up in assembling.

5. Oil Supply

Remove two oil plugs, and feed the specified lubricating oil from theupper plug hole until it flows out of the other lower plug hole.
(refer to the article on lubricating oil.)
After this, securely tighten oil plugs by applying a sealing agent for
use in the keyway or by using a seal tape.

CAUTION• The machine is not filled up with lubricating oil.
• Before starting on operation, fill the machine with the lubricating oil ofthe type as recommended by instruction manual, drawing, etc. up tothe specified level.
• The machine will result in failure if it is put in running without lubricating oil or in the state of short of oil.

6. Feeding oil

Remove two oil plugs, and feed the specified lubricating oil from theupper plug hole until it flows out of the other lower plug hole.
(Refering should be made to the article of lubricating oil.)
After feeding oil, securely tighten the oil plugs by using the sealing
agent for use in the keyway or by using a sealing tape.

Starting Operation
WARNING• During operation, never gain access to or come in contact with rotators(shaft etc.).
• There is a possibility of the accident of human body caused by entanglement.

CAUTION• Do not use the machine under the load exceeding the rated value.
• There is a possibility of failure and injury.
• In case of abnormality, stop the machine forthwith to investigate intothe cause of abnormality and never operate the machine until
remedial actions have been taken.
• There is a possibility of failure and injury.

Lubricating Oil
Lubricating oil is indispensable for stable operation of GC coupling.
Special care should be paid not to forget to feed oil and to oil leakage.
Use lubricating oil equivalent to gear oil; JIS K2219 Kind to ISO
VG680 with extreme-pressure additive.
Especially in case of high ambient temperature, extremely overload
operation, frequent normal and reversing runnings, and a large
parallel misalignment and angular misalignment ; be sure to use highviscous gear oil of 70 -110 cst at 98.9°C.

Upper oil plug(oil feeding hole)

Lower oil plug(oil discharging hole)

The first exchange of lubricating oil must be performed after about
3 months' operation, namely dismantle the coupling, throughly clean
away the inside to remove the used oil and abrasion particles etc.,
reassemble it so that the same teeth before dismantling can bemeshed each other again, and feed fresh oil from the plug hole;
thereafter, supplement or exchange the oil every 6 months.
Grease lubrication is inferior to the oil lubrication in its lubricating performance. When using grease, be sure to apply the recommended
grease on the coupling gears (internal and external gears) to such an
amount that their addendums can not be seen any more, andassemble them in. After fastening the coupling case, fill the case witha specified amount of grease from the oil plug hole by the use of agrease gun, etc.
Intervals of exchanging grease are the same as those of the abovementioned lubricating oil. When exchange grease, dismantle thecoupling and exchange the entire used grease for the new one. Inreassembling the coupling, be sure to keep the same gear teeth
meshing as before dismantling. Refer to the following lists regarding
lubricating oil brands and required lubricating oil amounts.

Maintenance and CheckWARNING• Take appropriate measures to prevent rotating the drive and the driven
gear securely when inspecting the condition of the surface of the gear
teeth. Otherwise, you may be caught in the gearwheels, which may
cause an accident resulting in injury or death.
• Do not operate without providing the safety cover which was removed
during inspection.
• Otherwise an accident resulting in injury or death may be caused bybeing caught in the rotating part.
1. Check for vibrations and noises.
2. Check for oil leakage.
3. Check for damages on gear teeth.
4. Check for damages and deterioration on O-ring.
5. Check for lubricating oil deterioration.
6. Check for oil consumption.

Horizontal line

Fig. 2 Method of Oil supply
For feeding lubricating oil, remove two plugs as shown in the above
Fig. 2, then feed the recommended oil from the upper plug hole until it
flows out of the lower plug hole. In case of cold weather or viscous oil,warm the lubricating oil up to approx. 40°C so as to feed it smoothly.

The above items Land 2. can be checked by observation from theoutside, so that always check them comparing with the conditions
under normal operation. The other items than the above should bechecked every 6 months by dismantling in principle. Under highambient temperature, extreme over-load operation, frequent normal
and reversing runnings, and large parallel misalignment and angularmisalignment, be sure to shorten the checking interval.

Table 1 List of lubricating oil brands
Oil equivalentequivalent to
Oil equivalentequivalent toGrease equivalentequivalent toOiltoOiltoGrease
to70-110 cst
cst (98.9ºC)
JIS KIND
KIND 22 ISO
ISO VG680
JIS KIND
KIND 44 NO.1
No.1
JIS
VG680
70-110(98.9ºC)JISIDEMITSU KOSANDAPHNE SUPERDAPHNE GREASEIDEMITSUKOSAN CO.,LTD.
CO.,LTD.
DAPHNESUPER GEAR
GEAR OIL
OIL680680
DAPHNE
GREASE MP
MP No.1
No.1
EXXON MOBILMOBIL GEARMOBILUX EP1EXXON
MOBIL CORPORATIONCORPORATIONMOBILGEAR 600XP
600XP 680
680
MOBILUXEP1Shell Lubricants
K.K.
SHELL OMALASHELL ALVANIA
SHOWASHELL JapanSEKIYUK.K.
SHELL
OMALA S2
S2 G
G 680
680
SHELL
ALVANIA EP
EP GREASE
GREASE11JXTG
Nippon Oil & Energy Corporation BONNOCTS680
BONNOCM 38003800 EPINOC
GREASE AP(N)AP(N) 11
BONNOC M
ENEOS
BONNOC TS680
EPINOC GREASECOSMO
OIL LUBRICANTS
CO.,LTD.
COSMOGEAR SESE 680680
COSMO
SHUCHU GREASE
GREASENo.1
No.1
COSMO OIL
CO.,LTD.
COSMO GEARCOSMO SHUCHU
Maker
Maker

Table 2 List of required lubricating oil amounts
Types GC-SSM and GC-SEM

TypeTypes GC-CCM and GC-CEM

SSM

SEM

L
100
112
125
140
160
180
200
224
250
280
315
355
400

0.043
0.055
0.072
0.11
0.14
0.18
0.24
0.36
0.53
0.69
1.1
1.3
2.0

Type

CCM

L
38
50
65
100
130
160
220
320
480
620
1000
1200
1800

0.032
0.042
0.056
0.085
0.11
0.14
0.18
0.29
0.41
0.56
0.9
1.1
1.6

CEM

L
29
38
51
77
100
130
170
270
370
510
810
1000
1440

450
500
560
630
710
800
900
1000
1120
1250
1400
1600

2.6
3.8
4.6
6.7
9.4
13
17
23
31
45
66
94

L
2.3
3.4
4.1
6.0
8.4
11.5
152027405984

2.1
3.1
3.8
5.8
7.8
111420263755
76

1.9
2.8
3.5
5.3
7.0
101318243450
69

Allowable Amounts of Misalignments
The following tables show the allowable amounts of misalignments determined by a structural consideration. Itis, therefore, practically recommended that the alignment should be made as accurately as possible according
to the service conditions such as the place of application, type of machine, service rpm, etc.
Recommended amount for centering : with 1/10 of following table(a) Amount of angular Misalignment
Table 3Types

Amount of (θ)

TypesAmount of (θ)

GC-SSM. GC-SMM

3º

GC-SEM

1.5º

GC-CCM

2º

GC-CEM

1º

GC-SMV

0.5º(b) Amounts of offset Misalignment (δ) and axial float (α)
Table 4

Types GC-SSM. GC-SMM. GC-CCM(m/m)

Types GC-SMV(m/m)

Unit size

（δ）

（α）

Unit size

（δ）

（α）

Unit size

（δ）

（α）

100

0.75

–0.5 ～ +1.0

450

3.0

–0.5 ～ +5.0

100

0.6

–0.5 ～ +1.0

112

1.0

–0.5 ～ +2.0500

3.5–0.5 ～ +6.0

112

0.6–0.5 ～ +1.0

125

1.0–0.5 ～ +2.5

560

4.0

–0.5 ～ +6.5

125

0.6

–0.5 ～ +1.5

140

1.25

–0.5 ～ +2.5

630

4.5

–0.5 ～ +8.0

140

0.6

–0.5 ～ +1.5

160

1.25

–0.5 ～ +3.0

710

5.0

–0.5 ～ +8.5

160

0.6

–0.5 ～ +1.5

180

1.5

–0.5 ～ +3.0

800

5.5

–0.5 ～ +9.5

180

0.6

–0.5 ～ +1.5

200

1.5

–0.5 ～ +3.0

900

6.5

–0.5 ～ +10.5

200

0.6

–0.5 ～ +1.5

224

1.5

–0.5 ～ +4.0

1000

7.0

–0.5 ～ +12.0

224

0.6

–0.5 ～ +2.0250

2.0–0.5 ～ +4.0

1120

8.0

–0.5 ～ +13.0

250

1.0

–0.5 ～ +2.0

280

2.0

–0.5 ～ +4.5

1250

9.0

–0.5 ～ +14.0

280

1.0

–0.5 ～ +2.5

315

2.5

–0.5 ～ +5.5

1400

10.0

–0.5 ～ +16.5

315

1.0

–0.5 ～ +3.0

355

3.0

–0.5 ～ +5.5

1600

11.0

–0.5 ～ +18.0

355

1.0

–0.5 ～ +3.0

400

3.0

–0.5 ～ +5.5

400

1.0

–0.5 ～ +3.5

NOTE : The types SEM & CEM can not absorb the offset misalignment (δ) by itself, whose axial float (α)
will be half of the amount given above
For the types SEM&CEM, two sets of either type should be used with an intermediate shaft as shownin Fig.3.
In this case, the amount of offset misalignment can be obtained from the following equations.
δor δ＝L×tanφLusually taking as L ≒ L´

φtanφ＝

δL´
LFig. 3SEISA Gear, Ltd.
Head Office : 16-1, Wakihama 4-chome, Kaizuka, Osaka, Japan(597-8555)
Tel : Kishiwadakaizuka 81-(0)724-39-1151 Fax : 81-(0)724-31-0846