Page 1
RH-981A 1/8
2002.10
RH-981A
Electronic Eyelet Button Holer
RH-981A-
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□□□□
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Specifications
Specification -00 -01 -02 & -52
Application Men’s and ladies’ closes Jeans and work clothes
Sewing speed 1,000 – 2,200 rpm (100-rpm steps)
Stitch length
5 – 50 mm 5 – 38 mm
L1: 14 - 18 mm L5: 28 - 32 mm
L2: 18 - 22 mm L6: 32 - 36 mm
L3: 22 - 26 mm L7: 36 - 40 mm
L4: 26 - 30 mm
Stitch pitch
0.5 – 2.0 mm
Stitch width
1.5 − 3.2 mm
Tacking length
0 – 20 mm
Work clamp height 12 mm
16 mm
Starting method Dual switch (cloth presser switch and start switch) or single switch
Feed method
Intermittent feed by three pulse motors (X, Y, θ)
Needle
DO × 558 Nm 80 − Nm 120 (Schumetz)
Safety equipment
Built−in emergency stop function and automatic stopping device which stops the machine
when the safety circuit is activated.
Motor
Inverter−type induction motor
Air pressure
Main regulator: 0.5 Mpa
Knife pressure regulator: 0.3 Mpa
Air consumption 43.2 l / min (8 cycle / min)
Noise level 85 dB at max. speed of 2,200 rpm, measured according to ISO 10821
Dimensions
1,200 mm (W) × 590 mm (D) × 1,120 mm (H)
Work table legs
T−shaped height−adjustable type
Power supply
Single−phase 110, 220, 230, 240 V
Three phase 220, 380, 415 V
Max. electric power consumption: 1kVA
Weight 163.5 kg
Lower thread trimmer
Upper
thread
trimmer
Long
type
Short
type
Fly indexer
Upper gimp
guide
Special lapel
cutting device
-00
{
- - - Option Option
-01
{{
- - Option Option
-02
{
-
{
Option Option -
-52
{
-
{{
Option
(L1-L4)
-
*-02 and –52 specifications are further divided into L1 – L7 specifications in accordance
with the stitch length. Please be sure to specify the stitch length when ordering.
Page 2
RH-981A 2/8
2002.10
Replacement parts list for specification changes
The sewing machine can be changed to any one of L1 to L7 for –02 and –52 specifications by replacing the
specified parts with the appropriate parts given below.
-02 specifications
Plate R assemblySpecifications
(buttonhole length)
Replacement parts set
Plate L assembly
Hammer Specification harness
S38576-301 S37702-001 (S12)L1
（14 - 18mm）
S44238-001
S38577-201 S37704-001 (S16)
S43337-000
S38578-301 S37704-001 (S16)L2
（18 - 22mm）
S44239-001
S38579-201 S37706-001 (S20)
S43338-000
S38580-301 S37706-001 (S20)L3
（22 - 26mm）
S44240-001
S38581-201 S37708-001 (S24)
S43339-000
S38582-301 S37708-001 (S24)L4
（26 - 30mm）
S44271-001
S38583-201 S42053-001 (S28)
S43340-000
S41470-101 S37197-001 (26)L5
（28 - 32mm）
S44272-001
S41471-101 S37199-001 (30)
S43341-000
S41472-101 S37199-001 (30)L6
（32 - 36mm）
S44273-001
S41473-101 S37201-001 (34)
S43342-000
S41474-101 S37201-001 (34)L7
（36 - 40mm）
S44274-001
S41475-101 S35093-001 (38)
S43343-000
Note: There is 10 mm of difference in the knife cutting position between L1 – L4 and L5 – L7 specifications.
-52 specifications
Plate R assembly
Specifications
(buttonhole length)
Plate L assembly
Hammer Specification harness Cloth feed plate R
S38576-301 S37702-001（S12）
L1
（14 - 18mm）
S38577-201 S37704-001（S16）
S43360-000 S43809-001
S38578-301 S37704-001（S16）
L2
（18 - 22mm）
S38579-201 S37706-001（S20）
S43361-000 S43809-001
S38580-301 S37706-001（S20）
L3
（22 - 26mm）
S38581-201 S37708-001（S24）
S43362-000 S42139-101
S38582-301 S37708-001（S24）
L4
（26 - 30mm）
S38583-201 S42053-001（S28）
S43363-000 S42139-101
S41470-101 S37197-001（26）
L5
（28 - 32mm）
S41471-101 S37199-001（30）
S43364-000 S43809-001
S41472-101 S37199-001（30）
L6
（32 - 36mm）
S41473-101 S37201-001（34）
S43365-000 S42139-101
S41474-101 S37201-001（34）
L7
（36 - 40mm）
S41475-101 S35093-001（38）
S43366-000 S42139-101
Note: There is 10 mm of difference in the knife cutting position between L1 – L4 and L5 – L7 specifications.
Page 3
RH-981A 3/8
2002.10
Special lapel cutting device
*When sewing straight buttonholes, needle rotates 6 mm in front of the tip of the eyelet buttonhole knife, so
that the seam length for straight buttonholes will be as shown in the table.
*The standard hammers are 5 mm and 7 mm.
*The special lapel cutting device can be used only when the feed bracket is set to the front position.
Specifications Eyelet buttonhole Straight buttonhole
RH-981A-00 5 – 50 mm 5 – 44 mm
RH-981A-01 5 – 38 mm 5 – 32 mm
Page 4
RH-981A 4/8
2002.10
Ref. No. Part name Part code Q’ty
15 Special lapel cutting device S53906-101 1
15-1 Selector assy, hammer S53907-001 1
15-1-1 Support plate, cylinder S53908-001 1
15-1-2 Setting plate, cylinder S53909-001 1
15-1-3 Bolt, socket SM3.57x8 154965-001 2
15-1-4 Washer, plain 105161-004 2
15-1-5 Screw, pan M3x6 062300-605 2
15-1-6 Setting lever, hammer S53910-001 1
15-1-7 Bolt, socket SM3.57x8 154965-001 1
15-1-8 Partition plate, sensor S53914-001 1
15-1-9 Set screw, SM3.57-40x4.5 144458-001 1
15-1-10 Sensor, hammer home position S53915-000 1
15-1-11 Sensor, hammer position S53916-000 1
15-1-12 Sensor bracket, MS-GL8 S53917-000 2
15-1-13 Screw, pan M3x8 062300-805 2
15-1-15 Rotary cylinder assy S53918-001 1
15-1-1 Rotary cylinder plate assy S54026-001 1
15-1-15-1-1 Setting plate, sensor S53913-001 1
15-1-15-1-2 Bolt, socket M3x16 018301-636 2
15-1-15-2 Throttle tube joint S19900-000 1
15-1-16 Tube elbow, w/valve S16603-000 1
15-1-17 Air tube, 4x2.5-60 S53920-000 1
15-1-18 Air tube, 4x2.5-61 S53921-000 1
15-2 Band, PLT1M S04557-000 1
15-2- Sensor plate assy, B-hole S53923-001 1
15-2-1 Setting plate, cloth sensor S53924-001 1
15-2-2 Y-driving shaft holder S31568-000 1
15-2-3 Bolt, socket M5x16 018501-622 1
15-2-4 Bolt, socket SM4.37x8 018680-822 2
15-2-5 Washer 100645-003 2
15-2-6 Photo sensor S53925-000 1
15-2-7 Screw, pan (S/P washer) M3x8 0A4300-805 2
15-2-8 Harness, B-hole sensor S53926-000 1
15-2-9 Band, PLT1M S04557-000 1
15-3 Setting shaft, sensor S53922-001 1
15-4 Valve assy S53927-000 1
15-4-1 Valve, VZ3120-F S53928-001 1
15-4-1-1 Valve, VZ3120 S13578-000 1
15-4-1-2 Bracket S53929-000 1
15-4-2 Half union S04905-000 1
15-4-3 Elbow union, 4M5 S11426-000 2
15-5 Wood screw, round M3.5x16 032361-602 2
15-6 Valve harness S53930-000 1
15-7 Hammer plate, 7 S53911-001 1
15-8 Bolt, socket M3x5 018300-536 2
15-9 Bolt, socket M4x8 018400-832 2
15-10 Cord holder, 6N 146202-000 1
15-11 Screw, pan M4x16 062401-616 1
15-12 Washer, plain M6 025060-236 1
15-13 Band, PLT1M S04557-000 3
15-14 Half union, ;KQH04-01S S04910-000 1
15-15 Air tube, 4x2.5-62 S53939-000 1
15-16 Cover, H ;N-rotation S53937-001 1
15-17 Cord holder, 10N 552907-000 1
15-18 Indexer cord S43359-000 1
15-19 Selector harness S59739-000 1
16 Hammer plate, 5 S53912-001 1
Page 5
RH-981A 5/8
2002.10
Fly indexer specifications (−−−−52 specifications)
Standard size
Large size
Applicable specifications
L1 (Buttonhole length : 14 - 18 mm), L5 (Buttonhole length : 28 - 32 mm)
L2 (Buttonhole length : 18 - 22 mm), L6 (Buttonhole length : 32 - 36 mm)
L3 (Buttonhole length : 22 - 26 mm), L7 (Buttonhole length : 36 - 40 mm)
L4 (Buttonhole length : 26 - 30 mm)
Distance between button
holes
38.1 mm, 50.8 mm, 44.45 mm
38.1 mm, 50.8 mm, 44.45 mm, 57.15 mm
No. of buttonholes
1 - 4 holes
1 - 6 holes
Horizontal sewing margin
(L1 - L4) 9 - 21 mm, (L5 - L7) 9 - 11 mm
Vertical sewing margin
30 - 40 mm
Max. horizontal feed amount
152.4 mm
285.75 mm
*If the standard-sized fly indexer is used for sewing with a non-standard distance between buttonholes and a
non-standard number of buttonholes (up to 9), you need to make additional holes in the cloth feed bar (F)
assy (optional part). For this processing, refer to the instruction manual supplied with this optional part.
Part name
Part code
Applicable specifications
Cloth feed bar (F) assy (L1, L2)
S45193-101
L1, L2, L5
Cloth feed bar (F) assy (L3, L4)
S45194-101
L3, L4, L6, L7
Part name Part code Applicable specifications
S44279-101 L1, L2, L5
Fly indexer assy, 981
S44281-101 L3, L4, L6, L7
Page 6
RH-981A 6/8
2002.10
Different parts list
Work clamp
*10mm to 50mm work clamps are available for –00.
*10 to 38 mm work clamps are available for –01.
L
S35455−001 S39929−001 S35197−001 S39931−001
R
S35454−001 S39930−001 S35198−001 S39932−001
<10 − 18 mm> <18 − 22 mm> <22 − 26 mm> <26 − 30 mm>
S35453−001 S35200−101 S37679−001 S37677−101
S35452−001 S35199−101 S37680−001 S37678−101
−00
&
−01
<26 − 38 mm>
<38 mm> <50 mm> <50 mm>
L
S37755−001 S37689−001 S37691−001 S37759−001
R
S37754−001 S37690−001 S37692−001 S37758−001
L1 <14 − 18 mm> L2 <18 − 22 mm> L3 <22 − 26 mm> L4 <26 − 30 mm>
S41848-001 S41486-101 S41488-001 S43408-001 S43410-001
S41483-001 S41485-101 S41487-001 S43409-001 S43411-001
L3W <22 − 26 mm> L4W <26 − 30 mm>
−02
&
−52
L5 <28 − 32 mm>
L6 <32 − 36 mm> L7 <36 − 40 mm>
<For waist belt presser>
Page 7
RH-981A 7/8
2002.10
Different parts list
Needle plate
*Both 38mm and 50mm needle plates are available for –00.
*Only 38 mm needle plates are available for –01.
L
S35308−101 (L) S35307−101 (SL) S37683−101 (L−50) S37681−101 (SL−50)
R
S35309−101 (R) S35306−101 (SR) S37684−101 (R−50) S37682−101 (SR−50)
−00
&
−01
<38 mm>
<38 mm> <50 mm> <50 mm>
L
S37643−101 (L1L) S37645−101 (L2L) S37647−101 (L3L) S37649−101 (L4L)
R
S37644−101 (L1R) S37646−101 (L2R) S37648−101 (L3R) S37650−101 (L4R)
L1 <14 − 18 mm> L2 <18 − 22 mm> L3 <22 − 26 mm> L4 <26 − 30mm>
S40823-001 (L5L) S41480-001 (L6L) S41482-001 (L7L)
S40822-001 (L5R) S41479-001 (L6R) S41481-001(L7R)
−02
&
−52
L5 <28 − 32 mm>
L6 <32 − 36 mm> L7 <36 − 40 mm>
Knife
S35439−101 S35437−101 S35480−101 S35482−101
S55247-001
S35408−101 (S)
<38 mm> <38 mm> <38 mm> <38 mm> <38 mm>
<38 mm>
S35438−101 S35436−101 S35481−101 S35483−101 S35409−101 (S)
<50 mm> <50 mm> <50 mm> <50 mm> <50 mm>
Page 8
RH-981A 8/8
2002.10
Different parts list
Hammer
Size (mm) 10 12 14 16
Part code
S37211−001 S37210−001 S37209−001 S37208−001
Size (mm) 18 20 22 24
Part code
S37194−001 S35092−001 S37195−001 S37196−001
Size (mm) 26 28 30 32
Part code
S37197−001 S37198−001 S37199−001 S37200−001
Size (mm) 34 36 38 50
−00
&
−01
Part code
S37201−001 S37202−001 S35093−001 S35479−001
Size (mm) S10 S12 S14 S16
Part code
S37701−001 S37702−001 S37703−001 S37704−001
Size (mm) S18 S20 S22 S24
Part code
S37705−001 S37706−001 S37707−001 S37708−001
Size (mm) S26 S28
−02
&
−52
Part code
S37709−001
S42053-001
Harness
Specification -
-00 & -01
Part code S43336-000
Specification L1 L2 L3 L4
Part code S43337-000 S43338-000 S43339-000 S43340-000
Specification L5 L6 L7
-02
Part code S43341-000 S43342-000 S43343-000
Specification L1 L2 L3 L4
Part code S43360-000 S43361-000 S43362-000 S43363-000
Specification L5 L6 L7
-52
Part code S43364-000 S43365-000 S43366-000
Optional parts
Double chain stitch looper mechanism
Use
Eye Looper
Looper, R
Spreader, L
Spreader, R
Standard
S35411-001
S35413-101
For heavy
S35471-001
S35472-101
For single chain stitch
S49078-001
S35410-001
S49079-001
S35412-101
Throat plate
Use
Throat plate
-00 and -01
A = 1.8 mm B = 4.6 mm
S47033-001
-00 and -01 (For small hole)
A = 1.8 mm B = 4.6 mm
S47034-001
-02
A = 1.8 mm B = 4.6 mm
S37752-001
For straight bar tack
A = --------- B = 4.6 mm
S39923-101
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