Brother TU-878B, TU-878A, SU-877B, SU-877A User Manual

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

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

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