REX F25A Series User manual

F25A Series
OPERATION MANUAL
PIPE THREADING MACHINE
Be sure to read this operation
manual before using the
machine.
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CONTENTS
,QWKLVRSHUDWLRQPDQXDOZDUQLQJVDUHGLYLGHGLQWRWARNINGDQGCAUTION
WARNING: LQGLFDWHVDFWLRQVWKDWFRXOGSRVVLEO\UHVXOWLQGHDWKRUVHYHUHLQMXU\WRWKHXVHULIWKHPDFKLQHLVXVHG
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CAUTION:LQGLFDWHVDFWLRQVWKDWFRXOGSRVVLEO\UHVXOWLQLQMXU\WRWKHXVHURUSK\VLFDOGDPDJHLIWKHPDFKLQHLV
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1
SAFETY CONSIDERATIONS
WARNING
1. Ensure you use the correct voltage.
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2 .Check the switch is OFF before inserting the plug into the power supply socket.
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3 . Avoid electric shock.
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4 . Be aware of the environment you are working in.
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5 . Use designated accessories and attachments.
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6 . In the following cases, turn the unit OFF and pull the plug out of the socket:
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7. If any abnormality is noticed, stop the machine immediately.
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8 . Keep the work site clean.
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9 . Do not let any unauthorised personnel near the machine.
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10 . Do not apply excessive force.
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11.Use the machine only for its designated purpose.
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12 .Wear proper working clothing.
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13 . Do not work in an unnatural posture.
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2
SAFETY CONSIDERATIONS
PRECAUTIONS WHEN USING F25A
Threading
WARNING
14 . Remove tools such as wrenches.
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15 .Operate the unit with great care.
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16 . Do not handle the power cord carelessly.
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17. Perform careful maintenance daily.
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18 .Check for damaged parts.
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19 . Store carefully when the machine is not in use.
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2 0 . For overhaul and repair of the machine, ask an appointed REX agent.
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WARNING
1.Take care when handling the blades.
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2 . Do not put your hands or face near rotating parts when the machine is in use.
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3 . Do not start on the next job while the machine is still rotating.
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4 . Do not wear gloves when operating the machine.
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5 . Do not leave the machine while it is still rotating.
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3
PRECAUTIONS WHEN USING F25A
Using the pipe cutter
WARNING
6 . If you accidentally drop or hit the machine, carefully check for damage, cracks,
deformities or any abnormalities.
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7. Do not touch the dies or scrap just after threading.
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8 . Die head and dies.
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9 . Be sure to check the starting position before threading.
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10 . Use the pipe support when threading long pipes.
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11. Be sure to attach accessories according to the operation manual.
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12 . Precautions when using the machine with an oil tray.
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CAUTION
1. When cutting pipes, turn the cutter handle no faster than ½ a rotation for each
rotation of the pipe.
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2 . Do not leave the machine unattended while it is still rotating.
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WARNING
1. Changing parts with blades, sharp edges, etc.
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2 .Use a pipe support when threading long pipes.
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3 . Do not put your hands or face near rotating parts when the machine is in use.
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4 . Do not wear gloves when operating the machine.
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4
PRECAUTIONS WHEN USING F25A
Reaming
WARNING
Reamer blades are very sharp; to prevent injury, avoid touching them with bare hands.
Handling thread cutting oil
CAUTION
1. Wear goggles.
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2 .Wear protective gloves.
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3 .Take care not to breathe in oil mist or steam.
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4 . Do not thin the oil or mix it with threading oil produced by other companies.
5 . If water gets mixed in with the threading oil and the colour changes to a milky white or
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6 . Do not drink the oil.
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7. Do not place the oil where it can easily be reached by small children.
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9 . Storage.
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10 . Drums (200L).
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WARNING
1. Do not burn off the oil.
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2 . Handling waste oil and waste cans.
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Pipe
CAUTION
1. Do not use highly deformed or damaged pipes as doing so may lead to poor, if not
unusable, threads.
2 .When threading stainless steel pipes use pipes with a wall thickness equivalent to
Schedule 40 or more.

5
MAIN PARTS
7DEOH
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7DEOH
7DEOH
7DEOH
7DEOH
STANDARD SPECIFICATIONS
STANDARD ACCESSORIES
OPTIONS
Die head
Dies
APPLICATIONS
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0RWRUVLQJOHSKDVH ,QSXW:2XWSXW:VHULHVPRWRUZLWKEUDNH
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1HWZHLJKW  NJ
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MAIN PARTS, STANDARD SPECIFICATIONS, ACCESSORIES,
OPTIONS AND THEIR APPLICATIONS
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Dies  ò  ô ´    ´  2QHVHWHDFK ò -ô´´2QHVHWHDFK+66
3LSH&XWWHU Pipe cutter 3LSHFXWWHU+66
&XWWLQJRLO 0L\DJDZD:  5FDQ / 0L\DJDZD6:  5FDQV /
+H[DJRQDONH\V  PP PPHDFK
0DQXDO'+ %637137 ó  ´ &  %637 ó  ´ %6: Ǫ  ô´137 ó  ´ 1360 ½ ´
6HOIRSHQLQJ'+ %637137 ó  Ǫ´, ½  ´
&XWWHUZKHHOV )RUVWHHODQGVWDLQOHVVVWHHOSLSHV
For steel pipe
%637 ó  Ǫ´, ½ - ô´´
137 ó  Ǫ´, ½ - ô´ , 1´
1360 ½ - ô´, 1´
)RU&RQGXLWV & &   &  
)RU%ROWV %6: : Ǫ : ½: ǫ : ô
%DVH
+DPPHUFKXFN
+DQGOH &XWWHU
&XWWHUKDQGOH
'UDLQSOXJ
&DUULDJH
+DQGOHORFNSLQ
5HDUFKXFN
5HDPHU
&DUULDJHKDQGOH 0RWRULQVLGH
6ZLWFK

For stainless steel pipe
Water washable
Miyagawa 100SW-R 16L/4L
Miyagawa 50W-R 16L/4L
General use
Miyagawa 246-R 18L/4L
AB
)LJ
)LJ
)LJ
)LJ
Genuine REX thread cutting oil
1. Transportation (Fig. 2)
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SRVLWLRQZLWKWKHFXWWHUDQGPRYHWKHPDFKLQH
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KDQGOHLVVHFXUHG
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CAUTION
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2. Setting up (Fig. 3)
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(YHQZKHQSODFHGRQDÀDWVXUIDFHWKHUHDUFKXFNRIWKHPDFKLQH
LVGHVLJQHGWREHLQDVOLJKWO\UDLVHGSRVLWLRQ
CAUTION
,IWKHUHDUFKXFNLVWRRORZRLOZLOOÀRZRXWRIWKHSLSHPDNLQJWKH
ÀRRUGLUW\DQGZDVWLQJRLO
3. Cutting oil (Fig. 4)
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:DWHUZDVKDEOH0L\DJDZD:5%OXHFDQ
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0L\DJDZD6:5FXWWLQJRLOIRUVWDLQOHVVVWHHOSLSHLVXVHGRQO\
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4. Attaching and removing the die head (Fig. 5)
Removing the die head
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Attaching the Die head
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GETTING READY / OPERATION GUIDE
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Position
when moved
Working position
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'LHKHDG
post
/RFNVFUHZ


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5. Self-opening Die Head
GETTING READY / OPERATION GUIDE
How to adjust the thread cutting size
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Replacing the dies
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Main Parts
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Die head position pins
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Dies 4
Dies 1
Dies 3
Dies 2

8
)LJ
)LJ
)LJ
Attaching the Dies
)LJ )LJ
GETTING READY / OPERATION GUIDE
Attaching the Dies
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XQWLOWKHQRWFKLVHQJDJHG
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LPSDLUHG
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Adjusting the length of the thread
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ZLWK WKH KH[DJRQDO NH\ SURYLGHG DQG WKH NQRE WXUQHG WKUHH
VHWWLQJVWRWKHULJKWEHIRUHDGMXVWPHQWVDUHPDGH
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DGMXVWPHQW
Adjustment of Thread Depth
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2
1
1.
For thicker threads
2.
For thinner threads
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Lever nut
Loosen
Eccentric handle
Position for removing
/ replacing dies
Knock to
the right
Knock to
the right
Pull down
Dies size
- Position when cutting
threads
- Position when matching
the dimensions for
cutting threads.
Lever nut
Eccentric handle
Loosen
9
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GETTING READY / OPERATION GUIDE
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Removing the dies
Replacing the dies
6. Manual-open die head (There is no need to remove the die head from the machine).
Removing the dies
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Replacing the dies
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7. Setting up the pipe / Removing the pipe
WARNING
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DOWN
Scroll
+DQGZKHHO
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Pipe
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DOWN
STOP

60mm or more
10
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Suggestions for short pipes
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Suggestions for long pipes (Fig. 18)
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Model: Pipe support code No.170030
WARNING
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8. Power supply (Fig. 19)
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pipe Dies
Pipe support
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HGJH
Long pipe
OK

ON11
OFF
)LJ
)LJ
GETTING READY / OPERATION GUIDE
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Motor with built-in braking system
WARNING
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9. Checks before starting
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brake is effective
as OFF position
2LO
6WUDLQHU
Checking the amount of thread cutting oil /Oil tank
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/ Die head
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12
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GETTING READY / OPERATION GUIDE
:KHQFXWWLQJDVWDLQOHVVVWHHOSLSHXVHDstainless
steel pipe cutter wheel (product code: 135071)
A
B
C
11. Cutting pipes
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CAUTION
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WARNING
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Special precautions when you cut a pipe using another pipe
cutter (Fig. 24)
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PDFKLQHEHXVHGWRFXWSLSHV,IDQRWKHUFXWWHULVXVHGHQVXUHWKDW
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Fig. 24-B
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Fig. 24-C
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CAUTION
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LWLVQRWRQO\LPSRVVLEOHWRPDNHDSHUIHFWWKUHDGEXWPD\HYHQUHVXOW
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13
GETTING READY / OPERATION GUIDE
)LJ
)LJ
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)LJ
Rod
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3LSHZUHQFK
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5HGOLQH
12. Reaming
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UHDPHUWRFKDPIHUWKHLQVLGHRIWKHSLSHEHIRUHPDNLQJDWKUHDG
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FKDPIHULQJSRVLWLRQ)LJ
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FDUULDJH KDQGOH WR WKH ULJKW WR PRYH WKH UHDPHU IRU ZDUG WR
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UHDPLQJSURFHVV)LJ
CAUTION
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SLSHDVWKLVPD\VFUDWFKWKHSLSHRUHYHQGDPDJHWKHPDFKLQH
7KHUHDPHUEODGHVDUHH[WUHPHO\VKDUS1(9(5WRXFKWKHPZLWK
\RXUEDUHKDQGVDV\RXFRXOGEHVHULRXVO\LQMXUHG
Before threading a pipe
13. Carriage collision prevention mechanism (Fig. 27)
:KHQWKUHDGLQJDYHU\VKRUWSLSHWKHFDUULDJHPD\KLWWKHFKXFN
DQG FDXVH VHULRXV GHIRUPDWLRQ RU GDPDJH WR WKH PDFKLQH7KH
FROOLVLRQ SUHYHQWLRQ PHFKDQLVP LVGHVLJQHG WRVWRS WKHPRWRU
DXWRPDWLFDOO\ ZKHQ LW LV RQ WKH YHUJH RI FROOLGLQJ DQG SUHYHQW
GDPDJHWRWKHPDFKLQH
 :KHQ WKH FDUULDJH DSSURDFKHV WKH FKXFN WKH URG DOVR
DSSURDFKHVWKHVZLWFKDQGLVSXVKHGIRUZDUG
 $VWKHFDUULDJHPRYHVIRUZDUGVWKHURGSXVKHVRQWRWKHPDLQ
VZLWFKMXVWEHIRUHDFROOLVLRQRFFXUVDQGWKHPDFKLQHVWRSV
6LQFHWKHSLSHLVIDUWRRVKRUWPDNHVXUH\RXH[WHQGLWVOHQJWK
LQRUGHUIRUWKHSURFHVVWREHFDUULHGRXWSURSHUO\
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CAUTION
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14. Improper use of a pipe wrench (Fig. 28)
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KLJKULVNRIGDPDJLQJWKHPDFKLQH

14
GETTING READY / OPERATION GUIDE
Cutting edge Dies
Pipe
)LJ
)LJ
15. Cutting threads (Self-opening Die Head)
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VWHHOSLSH
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GHVLUHGVL]H)LJ
To change size: (Fig.30)
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 $OLJQ WKH SRVLWLRQLQJ QRWFK ZLWK WKH GHVLUHG SLSH VL]H DV
GLVSOD\HGRQWKHVL]HLQGLFDWRUSODWHDUURZ
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JURRYH
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7KHGLHKHDGLVQRZVHWLQSRVLWLRQ6ZLWFKRQWKHPDFKLQHDQG
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 2QFHWKUHHRU IRXUWKUHDGVKDYH EHHQFXWWKHUHPDLQGHUZLOO
EH FXW DXWRPDWLFDOO\ :KHQ WKH SUHVFULEHG WKUHDG OHQJWK LV
UHDFKHGWKHGLHVZLOOEHUHOHDVHGE\WKHDXWRRSHQOHYHU
7XUQWKHFDUULDJHKDQGOHWRWKHOHIWWRUHOHDVHWKHGLHKHDGIURP
WKHSLSH
WARNING
:KHQWKUHDGLQJLVFRPSOHWHGWKHVHOIRSHQLQJGLHKHDGVVXGGHQO\
RSHQ7KHUHLVDSRVVLELOLW\RIRLOVSODVKLQJRXWRUPHWDOÀDNHVÀ\LQJ
RXWZKLFKPLJKW UHVXOW LQ DFFLGHQW RU LQMXU\$YRLG SODFLQJ \RXU
KDQGVRUIDFHWRRFORVHWRWKHPDFKLQH
Precautions when threading
- Care when the dies come into contact with the pipe (Fig. 32)
(QJDJH WKHFXWWLQJ HGJH RI WKH GLHV YHU\ OLJKWO\ZLWKWKH HQG RI
WKHSLSH%ULQJLQJWKHGLHVWRRIRUFHIXOO\LQWRFRQWDFWZLWKWKHSLSH
ZLOOUHVXOW LQGDPDJH WRWKH GLHV DQG VKRUWHQWKHLUZRUNLQJ OLIH
2QFHWKHGLHVFRPHLQWRFRQWDFWZLWKWKHSLSHLQLWLDOO\DSSO\OLJKW
SUHVVXUHWRWKHFDUULDJHKDQGOHLQDFORFNZLVHGLUHFWLRQDQGWKHQ
JUDGXDOO\ LQFUHDVHWKHDPRXQWRIIRUFH WRFXW¿UPO\ $VWKH GLHV
FXWLQWRWKHSLSHLWLVQRORQJHUQHFHVVDU\WRDSSO\SUHVVXUHWRWKH
FDUULDJHKDQGOHDVWKHFDUULDJHZLOOPRYHRQLWVRZQ
)LJ
)LJ
*XLGHVHWNQRE
*XLGHVHWNQRE 3RVLWLRQLQJQRWFK
6L]HLQGLFDWRUSODWH
FDUULDJHKDQGOH
3 Release
2
4
1 Down
Push up

)LJ
Lever nut
Eccentric link
Eccentric
handle
Mark on eccentric
link
Die head size plate
Tighten
Loosen
15
Lever nut
Eccentric link
Loosen
Loosen
Mark on eccentric link
Eccentric
handle
Die head size plate
Tighten
Tighten
Larger Smaller
GETTING READY / OPERATION GUIDE
)LJ
)LJ
)LJ )LJ
Play
Slowly
&DUULDJHKDQGOH
16. Cutting threads (Manual-open Die Head)
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OLQNZLWKWKHWKUHDGVL]HRQWKHVL]HVFDOHRIWKHGLHKHDGDQG
WKHQWLJKWHQDQG¿[WKHOHYHUQXWLQSRVLWLRQ)LJ
7XUQWKHPDFKLQHRQDQGRLOZLOODXWRPDWLFDOO\ÀRZIURPWKHGLH
KHDG
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GLHV&XWRUWKUHDGVDQGWKUHDGLQJZLOOWKHQEHSHUIRUPHG
DXWRPDWLFDOO\)LJ
 :KHQ WKH WKUHDG KDV EHHQ FXW WR WKH SUHVFULEHG GLPHQVLRQV
VORZO\ UDLVH WKHHFFHQWULFKDQGOHLQWKHGLUHFWLRQ RIWKHDUURZ
DQGUHOHDVHWKHGLHVWRFRPSOHWHWKHWKUHDGLQJSURFHVV
1RWH ,I\RX UHOHDVH WKHGLHVWRRDEUXSWO\LW PD\UHVXOWLQ DQ
LPSHUIHFW¿QLVKVXFKDVDVWHSHGJHGWKUHDG)LJ
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SLSHE\WXUQLQJWKHFDUULDJHKDQGOHWRWKHOHIW,I\RXSODFHWKH
GLHKHDGLQWKHUDLVHGSRVLWLRQWKHÀRZRIRLOZLOOVWRS)LJ
Points to watch when threading
%HIRUHDGMXVWLQJWKHVL]HRIWKHWKUHDGWREH
FXWEULQJWKHHFFHQWULFKDQGOHWRZDUGV\RX
XQWLOLWLVLQWKHSRVLWLRQLQGLFDWHG)LJ
 /LJKWO\ WLJKWHQ WKH OHYHU QXW VHFXUHO\ E\
KDQG1RKDPPHULQJLVUHTXLUHGHWF
7KUHDGVL]HFDQEHVLPSO\DGMXVWHGZLWKWKH
OHYHUQXW 0RYH LW WRZDUGV\RX WRLQFUHDVH
DQGDZD\ IURP \RXWR GHFUHDVH WKHWKUHDG
VL]H)LJ


)LJ
GETTING READY / OPERATION GUIDE
Example of thread gauge
)LJ
Correct thread
Thread circumference
is polygonal
Narrow thread Wide thread
Thread gauge PipecoreThreadcore
Complete taper
thread
Angled
point
Distorted threads Uneven thickness
Parallel
thread
Width of the dies
Irregular shaped threads Too small
Gap
Chipped thread
4
5
6
1
2
3
Internal thread
External thread
17. Measuring threads with a gauge
Unacceptable threads (Fig. 37)
:KHQ FRQQHFWLQJ WKH PDOH WKUHDG RQ D FXW SLSH WR WKH
IHPDOH WKUHDGLQWKH MRLQW YDULRXV IDFWRUVWKDWFRXOGOHDG
WROHDNDJHVKRXOGEH FRQVLGHUHG7KH IROORZLQJH[DPSOHV
PD\EHGXHWRWKHPDOHWKUHDGRQWKHSLSHHQG
(1) Irregular shaped threads (Fig. 37 - 1)
How to distinguish irregular shaped threads
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GLUWZLWKDUDJORRNIRUDQ\ZDYHOLNHIRUPDWLRQ
% *HQWO\ FKHFN WKH VXU IDFH RI WKH WKUHDG ZLWK \RXU
¿QJHUVIHHOLQJIRUDQ\LUUHJXODULW\
& &KHFN LI ELWV RI VFUDS KDYH EHHQ SURGXFHG ZKHQ
FXWWLQJ
(2) Check if the diameter of the thread is too small or
too large (Fig. 37 - 2)
&KHFNZLWKDWKUHDGJDXJH
(3) Distorted threads (in the case of manual die heads)
(Fig. 37 - 3)
:KHQ FXWWLQJ WKUHDGV WKDW DUH ZLGHU WKDQ WKH ZLGWK
RI WKH GLHV \RX FDQ JUDGXDOO\ RSHQXS WKH HFFHQWULF
KDQGOHEXWWKHQLI\RXOHDYHWKHHFFHQWULFKDQGOHLQWKH
VDPHSRVLWLRQDQGFXWDWKUHDGORQJHUWKDQWKHZLGWKRI
WKHGLHVWKHWDSHUZLOOUHPDLQWKHVDPHZLGWKDVWKHGLH
DQGWKHUHVWRIWKHWKUHDGZLOOEHVWUDLJKW
(4) Threads are too small (Fig. 37 - 4)
(5) The thread is chipped (Fig. 37 - 5)
(6) Thread with uneven thickness (Fig. 37 - 6)
&KRRVHDQDSSURSULDWHPHWKRGIRUFKHFNLQJWKHWKUHDGV
RQMRLQWVDQGRWKHUFRQQHFWLRQVVXFKDVXVLQJVHDODQWV
ZDVKLQJWKHMRLQWFKHFNLQJWKHWRUTXHHWF
CAUTION
7KUHDGVPD\ EH DIIHFWHGE\ WKH VKDUSQHVV RIWKH GLHV
FXWWLQJRLOHWFVREHVXUHWRXVHDWKUHDGJDXJH)LJWR
FKHFNWKHWKUHDG
7KLVLVHVSHFLDOO\LPSRUWDQWDIWHU\RXKDYHFKDQJHGWKH
die set


DAILY INSPECTION, MAINTENANCE
)LJ
)LJ
)LJ )LJ
0RWRU
Replacing carbon brush A (Fig. 41)
5HPRYH WKHVLGHFRYHUIURP WKHVLGHRIWKH XQLW DQG
XVLQJDÀDWKHDGVFUHZGULYHUUHPRYHWKHFDUERQEUXVK
FDS DWWDFKHG WR WKH PRWRU LQVLGH 7KHQ UHSODFH WKH
FDUERQEUXVK
Replacing carbon brush B (Fig. 42)
5HPRYHWKHERWWRPFRYHUDQGXVLQJDÀDWKHDGPLQXV
VFUHZGULYHU UHPRYHWKH FDUERQEUXVK FDSDWWDFKHG WR
WKHPRWRU7KHQUHSODFHWKHFDUERQEUXVK
Replacing the carbon brushes
WARNING
%HIRUHLQVSHFWLQJRUSHUIRUPLQJPDLQWHQDQFHRQWKHXQLWDOZD\VVHWWKHVZLWFKWRWKH2))SRVLWLRQDQGUHPRYHWKH
SOXJIURPWKHSRZHURXWOHW,IWKHXQLWLVOHIWSOXJJHGLQLWPD\EHJLQRSHUDWLQJXQH[SHFWHGO\UHVXOWLQJLQLQMXU\
,I\RX GLVFRYHUDQ\SUREOHPVGXULQJLQVSHFWLRQRUPDLQWHQDQFH FKHFNWKHV\PSWRPVLQ7URXEOHVKRRWLQJDQGWDNH
WKH DSSURSULDWHDFWLRQDV QRWHGLQWKHWDEOH&RQWLQXHGXVHRIWKHXQLWZLWKRXWFRUUHFWLQJWKHSUREOHPPD\UHVXOWLQ
RYHUKHDWLQJVPRNHRU¿UHDQGOHDGWRDFFLGHQWRULQMXU\
1. Oiling the pipe cutter (Fig. 39)
%HIRUH \RXRSHUDWH WKHPDFKLQH EH VXUH WR PDLQWDLQ DGHTXDWH
OXEULFDWLRQE\DSSO\LQJVSLQGOHRLO RUPDFKLQH RLOWRWKH WKUHDGRQ
WKHFXWWHUKDQGOHUROOHUVKDIWVDQGEODGHVRQFHDGD\
2. Replacing the carbon brushes (Fig. 40)
 7R SURWHFW WKH PRWRU WKH XQLW LV HTXLSSHG ZLWK WZR DXWRVWRS
FDUERQEUXVKHV:KHQWKHVHEUXVKHVJHWWRRZRUQWKHPRWRUZLOO
QRWRSHUDWHHYHQZKHQWKHXQLWLVWXUQHGRQ
%HVXUHWRXVH5(;RULJLQDOFDUERQEUXVKHV8VLQJRWKHUEUXVKHV
PD\GDPDJHWKHPRWRU
CAUTION
$OZD\VUHSODFHERWKFDUERQEUXVKHVDVDVHW
%HVXUHWRXVH5(;RULJLQDOFDUERQEUXVKHV
8VLQJ RWKHUW\SHVRI FDUERQ EUXVKHVPD\GDPDJHWKHPRWRU RU
WKHPDFKLQHRUFDXVHDFFLGHQWV
:KHQUHSODFLQJ WKHFDUERQEUXVKHVDOZD\V PDNHVXUHWKHXQLW
LV VWDEOH 7U\LQJ WR UHSODFH WKH EUXVKHV ZLWK WKH XQLW WLOWHG LV
H[WUHPHO\GDQJHURXVDVWKHXQLWPD\IDOORYHU
2LO 2LO
Pipe cutter
&DUERQEUXVK$
6LGHFRYHU
0RWRU
%RWWRPFRYHU
&DUERQEUXVK%
&DUERQ EUXVK
FDS
&DUERQ EUXVK
FDS
&DUERQEUXVK
&DUERQEUXVK
6LGHFRYHU