Brother RH-981A, RH-981A-00, RH-981A-01, RH-981A-02, RH-981A-52 Specifications

RH-981A 1/8

2002.10

RH-981A

Electronic Eyelet Button Holer

RH-981A-

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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.

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.

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