Page 1
SU-877A
SU-877B
TU-878A
TU-878B
Single Needle Unison Feed Lock Stitcher with Large Hook
Single Needle Unison Feed Lock Stitcher with Large Hook and Thread Trimmer
Twin Needle Unison Feed Lock Stitcher with Large Hook
Twin Needle Unison Feed Lock Stitcher with Large Hook and Thread Trimmer
SU-877 TU-878 -
A B
Thread trimmer Solenoid
Quick reverse Solenoid
Specifications
005
305
Specifications
877A 877B 878A 878B
Specification 005 305 005 305
Application Medium, heavy, and extra heavy materials
No. of needles 1 2
Max. sewing speed 3,000 rpm 2,500 rpm
Max. stitch length 8 mm
Height of
presser foot
Standard needle gauge
Presser bar lifter 11 mm
Knee lifter 16 mm
Height of feed dog 1 mm
Hook Double horizontal rotary hook (vertical axis)
Needle
DP × 17
#23
DP × 17
#22
3.2mm (1/8), 4.8 mm (3/16), 6.4 mm (1/4), 9.5
mm (3/8), 12.7 mm (1/2), 15.9 mm (5/8), 25.4 mm
DP × 17
#23
Sewing speed table
Walking foot movement amount
Less than 3.5 mm 3,000 rpm 2,500 rpm
877A, 877B 878A, 878B
Sewing speed
DP × 17
#22
(1)
3.5 - 5.5 mm 2,000 rpm
*Set the sewing speed to the value which is equal to or less than the value shown in the table in accordance with the walking
foot movement amount setting. Furthermore, if sewing with a stitch length of 6 mm or more, set the sewing speed to 2,000
rpm or less.
SU-877A, 877B, TU-878A, 878B 1/7
2002.11
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SU-877 GAUGE PARTS LIST
For standard of SU-877A (Standard parts)
Needle plate Feed dog Inner p-foot assy Walking foot
150959-001 150960-001 183181-101 150962-001
For Thread trimmer of SU-877B (Standard parts)
Needle plate assy, TR Feed dog Inner p-foot assy Walking foot
156374-001 156376-001 183007-201 150962-001
Welting feet
Walking foot Inner p-foot assy
3.2 mm 151520-001 4.0 mm 151522-001 4.8 mm 151524-001 183008-001
6.4 mm 151526-001 7.9 mm 151528-001 9.5 mm 151530-001
12.7 mm 151532-001 183014-001
15.9 mm 151534-001 183015-001
Welting feet with teeth on inner p-foot assy
Walking foot Inner p-foot assy
4.8 mm 151536-001 183016-001
6.4 mm 151538-001 183017-001
7.9 mm 151540-001 183018-001
*Value in the list is welting width.
SU-877A, 877B, TU-878A, 878B 2/7
2002.11
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SU-877 GAUGE PARTS LIST
12.7 mm
Welting feet with teeth on inner p-foot assy
Walking foot Inner p-foot assy
4.8 mm 151542-001 183019-001
6.4 mm 151544-001 183020-001
7.9 mm 151546-001 183021-001
Curved welting feet
Walking foot Inner p-foot assy
4.8 mm 151548-001 183022-001
6.4 mm 151550-001 183023-001
7.9 mm 151552-001 183024-001
9.5 mm 151554-001 183025-001
151556-001 183026-001
*Value in the list is welting width.
SU-877A, 877B, TU-878A, 878B 3/7
2002.11
Page 4
SU-877 GAUGE PARTS LIST
Double welting feet
Walking foot Inner p-foot assy
4.8 mm 151588-001 183027-001
6.4 mm 151560-001 183028-001
9.5 mm 151562-001 183029-001
*Value in the list is welting width.
Feet with teeth, right
Walking foot Inner p-foot assy
151564-001 183030-001
Feet with teeth, left
Walking foot Inner p-foot assy
151566-001 183031-001
Narrow type feet for leather
Walking foot Inner p-foot assy
151568-001 183032-001
SU-877A, 877B, TU-878A, 878B 4/7
2002.11
Page 5
TU-878 GAUGE PARTS LIST
4.8 mm
S13585-001
9.5 mm
153886-001
TU-878A For standard of TU-878A
Needle plate Feed dog Needle clamp assy Inner p-foot assy Walking foot
3.2 mm 158429-001 158430-001 183190-001 183191-201 158431-001
S13588-001 S13628-001 S13629-201 S13587-001
6.4 mm 153881-001 153882-001 183095-001 183096-201 153885-001
153887-001 183097-001 183098-201 153890-001
12.7 mm 153891-001 153892-001 183099-01 183100-201 153895-001
15.9 mm 153896-001 153897-001 183101-001 183102-201 153900-001
19.1 mm 153901-001 153902-001 183103-001 183104-201 153905-001
25.4 mm 153906-001 153907-001 183105-001 183106-201 153910-001
*Value in the list is needle gauge.
SU-877A, 877B, TU-878A, 878B 5/7
2002.11
Page 6
TU-878 GAUGE PARTS LIST
4.8 mm
S50612-001
6.4 mm
S50626-001
TU-878B For Thread trimmer of TU-878B
Needle plate Feed dog Needle clamp assy Inner p-foot assy Walking foot
3.2 mm S50610-001 S50601-001 183190-001 183191-201 158431-001
S50608-001 S13628-001 S13629-201 S13587-001
6.4 mm S50614-001 S50607-001 183095-001 183096-201 153885-001
For Kevlar thread
9.5 mm S50616-001 S50602-001 183097-001 183098-201 153890-001
12.7 mm S50618-001 S50603-001 183099-001 183100-201 153895-001
15.9 mm S50620-001 S50604-001 183101-001 183102-001 153900-001
19.1 mm S50622-001 S50605-001 183103-001 183104-201 153905-001
*Value in the list is needle gauge.
SU-877A, 877B, TU-878A, 878B 6/7
2002.11
Page 7
TU-878 GAUGE PARTS LIST
For Thread trimmer of TU-878B
Needle plate Feed dog Needle clamp assy Inner p-foot assy Walking foot
25.4 mm S50624-001 S50606-001 183105-001 183106-201 153910-001
*Value in the list is needle gauge.
2002.11
SU-877A, 877B, TU-878A, 878B 7/7
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