Brother LT2-B845 MKII User manual

LT2−B845 Mark II, B8450 Mark II 1/11
2000.7
LT2−B845 Mark II
Twin Needle Needle Feed Split Needle
Bar Lock Stitcher
Twin Needle Needle Feed Split Needle
Bar Lock Stitcher with Thread Trimmer
Specifications *−1C·−3-−5−7
Application Formediummaterials Forheavymaterials Forextraheavymaterials
Max.speed 3,000rpm
Max..stitchlength 5mm
Needlebarstroke 33.4mm
Threadtake-upstroke 56.8mm(Withthreadtrimmer:52mm)
Manual 7mm
Knee 13mm(Withthreadwiper:10mm)
Heightof
Presserfoot Auto-presserbarlifter Solenoidtype:8 mm,Airtype:10mm
Heightoffeeddog 1mm
Needle DP×5#11−#22 DP×17#22
Hook Horizontalrotaryhook(verticalaxis)
Needlefeedmechanism Standard
Singleneedlestopdevice Standard
−400 −700 −900·−900S
Threadtrimmer Scissorstype(Solenoid)
Threadwiper Solenoidtype
Quickreverse Solenoidtype
Automaticpresserbarlifter −Airtype Solenoidtype

LT2−B845 Mark II, B8450 Mark II 2/11
2000.7
LT2−B8450 Mark II
Twin Needle Needle Feed Split Needle
Bar Lock Stitcher with Ply Sensor
Specifications −903 −905−907
Application Formediummaterials Forheavymaterials Forextraheavymaterials
Max.speed 3,000rpm
Max..stitchlength 5mm
Auto-presserbarlifter 8mm
Needle DP×5#14 DP×5#22 DP×17#22
Hook Horizontalrotaryhook(verticalaxis)
Threadtrimmer Scissorstype(Solenoid)
Threadwiper Solenoidtype
Quickreverse Solenoidtype
Automaticpresserbarlifter Solenoidtype

LT2−B845 Mark II, B8450 Mark II 3/11
2000.7
B845 Mark II (For Standard)
For normal
*A maximum stitch width specification of 5/8" (15.9mm) is available.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy
Formedium&heavymaterials(−3,−5)
(inch)
(mm)
Needleplate Feeddog Presserfootassy
L:S15711−001
L:S15713−001
1/8(3.2) R:S15712−001 R:S15714−001 117369−001 114951−001 114948−001
L:S15717−001 L:S15719−001
5/32 (4.0) R:S15718−001 R:S15720−001 150850−001 116509−001 116502−001
L:S15723−001
L:S15725−001
112638−001
3/16 (4.8) R:S15724−001 R:S15726−001 117133−001 112659−001 S36546−001 ¡
L:S15735−001
L:S15737−001
112642−001
1/4(6.4) R:S15736−001 R:S15738−001 117367−001 112660−001 S36548−001 ¡
L:S15747−001 L:S15749−001
5/16 (7.9) R:S15748−001 R:S15750−001 144882−001 112661−001 112645−001
L:S15753−001
L:S15755−001
3/8(9.5) R:S15754−001 R:S15756−001 144881−101 116510−101 116498−001
L:S15759−001
L:S15761−001
7/16 (11.1) R:S15760−001 R:S15762−001 151596−001 151598−001 151597−101 ¡
L:S15765−001 L:S15767−001
1/2(12.7) R:S15766−001 R:S15768−001 S09365−001 116511−001 116499−101 ¡
L:S15771−001
L:S15773−001
5/8(15.9) R:S15772−001 R:S15774−001 159577−001 116512−001 116500−101 ¡
(−3,−5)
Formedium&heavymaterials
Needleclampset Needleclampassy Needleplate Feeddog
Presserfootassy
(Finger guard less) (Withfingerguard)

LT2−B845 Mark II, B8450 Mark II 4/11
2000.7
B845 Mark II (For Standard)
For sewing without material
*The needle plate, the feed dog and the presser foot assembly are different from normal parts.
*Use gauge components for sewing without material which have a maximum feed pitch of 4mm or less.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15723−001
L:S15725−001
3/16 (4.8) R:S15724−001 R:S15726−001 S36010−101 S36011−101 S36012−001
L:S15735−001 L:S15737−001
1/4(6.4) R:S15736−001 R:S15738−001 S36025−001 S36024−001 S36022−001
Needleplate Feeddog Presserfootassy

LT2−B845 Mark II, B8450 Mark II 5/11
2000.7
(−7) : For extra heavy materials
*The feed dog is different from normal parts.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15711−001
L:S15713−001
1/8(3.2) R:S15712−001 R:S15714−001 117369−001 158430−001 114948−001
L:S15723−001
L:S15725−001
112638−001
3/16 (4.8) R:S15724−001 R:S15726−001 117133−001 S13588−001 S36546−001 ¡
L:S15735−001
L:S15737−001
112642−001
1/4(6.4) R:S15736−001 R:S15738−001 117367−001 153882−001 S36548−001 ¡
L:S15753−001
L:S15755−001
3/8(9.5) R:S15754−001 R:S15756−001 144881−101 153887−001 116498−001
L:S15765−001
L:S15767−001
1/2(12.7) R:S15766−001 R:S15768−001 S09365−001 153892−001 116499−101 ¡
L:S15771−001
L:S15773−001
5/8(15.9) R:S15772−001 R:S15774−001 159577−001 153897−001 116500−101 ¡
Feeddog
(−6) : For heavy materials
*-6 (for heavy materials) is a specification between –5 (for heavy materials) and –7 (for extra heavy materials).
*The feed dog is different from normal parts.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15723−001 L:S15725−001 112638−001
3/16 (4.8) R:S15724−001 R:S15726−001 117133−001 S21149−001
S36546−001
¡
L:S15735−001 L:S15737−001 112642−001
1/4(6.4) R:S15736−001 R:S15738−001 117367−001 S21150−001 S36548−001 ¡
Feeddog

LT2−B845 Mark II, B8450 Mark II 6/11
2000.7
(−1) : For light materials
*The feed dog is different from normal parts.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15711-001 L:S15713-001
1/8(3.2) R:S15712-001 R:S15714-001 117369-001 S07880-001 114948-001
L:S15723-001 L:S15725-001 112638-001
3/16 (4.8) R:S15724-001 R:S15726-001 117133-001 S07878-001
S36546-001
¡
L:S15735-001 L:S15737-001 112642-001
1/4(6.4) R:S15736-001 R:S15738-001 117367-001 S07879-001
S36548-001
¡
Feeddog
Option parts
*The presser foot assembly is different from normal parts.
*The presser foot assembly with guide should be used with a maximum feed pitch of 4mm or less.
Nameofparts Needlegauge Presserfootassy
(inch)
(mm)
1/8(3.2) 149311−001
Presserfootassywithguide 3/16 (4.8)
117281−001
1/4(6.4)
149312−001
Presserfootassywithguide,L 5/16 (7.9) S13735−001
Presserfootassyforattachzipper(Right) 1/8(3.2) S14080−001
Presserfootassyforattachzipper(Left) 1/8(3.2) S33459−001
Presserfootassywithguide Presserfootassywithguide,L Presserfootassyforattachzipper
(Right) Presserfootassyforattach zipper(Left)

LT2−B845 Mark II, B8450 Mark II 7/11
2000.7
B845 Mark II (For Thread trimmer)
For normal
*A maximum stitch width specification of 5/8" (15.9mm) is available.
*The ¡symbol is a presser foot assembly with finger guard.
*The thread trimming fixed knife (part No. S07527−001) and the installation screw (part No. 148539−101) are not provided with the
needle plate, so they must be ordered separately if required.
*In case of using the gauge set (2 /32"),use needle size DB ×1(#7 −#18).
Needlegauge Needleclamp
set Needleclamp assy Needleplate Feeddog Presserfootassy
(−3,−5) (−3) (−5) (−3) (−5)
(inch) (mm) Formedium&
heavymaterials
Formedium
materials Forheavy materials Formedium materials
Forheavymaterials
L:S15705−001
L:S15707−001
*3/32 (2.4)
R:S15706−001
R:S15708−001
159398−001 148697−001 148679−001
L:S15711−001
L:S15713−001
148685−001
148681−001
1/8(3.2) R:S15712−001 R:S15714−001 155722−001 148698−001 148699−001 S36550−001 ¡S36522−001 ¡
L:S15717−001 L:S15719−001
5/32 (4.0) R:S15718−001 R:S15720−001 155724−001 148700−001 148701−001 148689−001 148683−001
L:S15723−001
L:S15725−001
148687−001
148691−001
3/16 (4.8)
R:S15724−001
R:S15726−001
155851−001 148702−001 148703−001
S36554−001
¡
S36556−001
¡
L:S15729−001
L:S15731−001
7/32 (5.6) R:S15730−001 R:S15732−001 156816−001 156818−001 156819−001
L:S15735−001 L:S15737−001 148693−001 148695−001
1/4(6.4) R:S15736−001 R:S15738−001 155853−001 148704−001 148705−001 S36558−001 ¡S36560−001 ¡
L:S15741−001
L:S15743−001
9/32 (7.1)
R:S15742−001
R:S15744−001
S14530−001 S14532−001 S14533−001 S14534−001 S14536−001
L:S15747−001
L:S15749−001
5/16 (7.9) R:S15748−001 R:S15750−001 155855−001 149692−001 149691−001 149689−001 149687−001
L:S15753−001 L:S15755−001
3/8(9.5) R:S15754−001 R:S15756−001 155857−001 149939−001 149938−001 149942−001 149940−001
L:S15759−001
L:S15761−001
7/16 (11.1)
R:S15760−001
R:S15762−001
S01644−001 S01646−001 S01641−101 ¡
L:S15765−001
L:S15767−001
1/2(12.7) R:S15766−001 R:S15768−001 149677−001 149676−001 149675−001 149673−101 ¡149671−101 ¡
L:S15771−001 L:S15773−001
5/8(15.9) R:S15772−001 R:S15774−001 149954−001 149949−001 149948−001 149952−101 ¡149950−101 ¡

LT2−B845 Mark II, B8450 Mark II 8/11
2000.7
B845 Mark II (For Thread trimmer)
For normal
Feeddog
Needleclampset Needleclampassy (−3)
Formediummaterials (−5) Forheavymaterials
Needleplate Presserfootassy
(−3,−5)
Formedium&heavymaterials (−3) Formediummaterials (−5) Forheavymaterials
For sewing without material
*The needle plate, the feed dog and the presser foot assembly are different from normal parts.
*Use gauge components for sewing without material which have a maximum feed pitch of 4mm or less.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15723−001 L:S15725−001
3/16 (4.8) R:S15724−001 R:S15726−001 S20901−001 S20905−001 S20903−001
L:S15735−001
L:S15737−001
1/4(6.4) R:S15736−001 R:S15738−001 S10507−001 S10509−101 S10510−001
Needleplate Feeddog Presserfootassy

LT2−B845 Mark II, B8450 Mark II 9/11
2000.7
(−7) : For extra heavy materials
*The feed dog is different from normal parts.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15723−001
L:S15725−001
148691−001
3/16 (4.8) R:S15724−001 R:S15726−001 155851−001 S07905−001 S36556−001 ¡
L:S15735−001
L:S15737−001
148695−001
1/4(6.4) R:S15736−001 R:S15738−001 155853−001 158756−001 S36560−001 ¡
Feeddog

LT2−B845 Mark II, B8450 Mark II 10/11
2000.7
B8450 Mark II (With ply sensor and thread trimmer)
For normal
*The thread trimming fixed knife (part No. S07527−001) and the installation screw (part No. 148539−101) are not provided with the
needle plate, so they must be ordered separately if required.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclampset Needleclamp
assy Needleplate Feeddog Presserfootassy
(−3,−5) (−3) (−5) (−3) (−5)
(inch) (mm) Formedium& heavymaterials Formedium materials Forheavy materials Formedium& materials Forheavy materials
L:S15717−001
L:S15719−001
5/32 (4.0)
R:S15718−001
R:S15720−001
S13512−101 148700−001 148701−001 148689−001 148683−001
L:S15723−001
L:S15725−001
148687−001
148691−001
3/16 (4.8) R:S15724−001 R:S15726−001 S13514−101 148702−001 148703−001 S36554−001 ¡S36556−001 ¡
L:S15735−001 L:S15737−001 148693−001 148695−001
1/4(6.4) R:S15736−001 R:S15738−001 S13510−101 148704−001 148705−001 S36558−001 ¡S36560−001 ¡
L:S15747−001
L:S15749−001
5/16 (7.9)
R:S15748−001
R:S15750−001
S13516−101 149692−001 149691−001 149689−001 149687−001
L:S15753−001
L:S15755−001
3/8(9.5) R:S15754−001 R:S15756−001 S13518−101 149939−001 149938−001 149942−001 149940−001
Feeddog
Needleclampset Needleclampassy (−3)
Formediummaterials (−5) Forheavymaterials
Needleplate Presserfootassy
(−3,−5)
Formedium&heavymaterials (−3) Formediummaterials (−5) Forheavymaterials

LT2−B845 Mark II, B8450 Mark II 11/11
2000.7
B8450 Mark II (With ply sensor and thread trimmer)
(−6) : For heavy materials
*-6 (for heavy materials) is a specification between –5 (for heavy materials) and –7 (for extra heavy materials).
*The feed dog is different from normal parts.
*The ¡symbol is a presser foot assembly with finger guard.
Needlegauge Needleclamp set Needle clamp assy Needleplate Feeddog Presserfootassy
(inch)
(mm)
L:S15723−001 L:S15725−001 148691−001
3/16 (4.8) R:S15724−001 R:S15726−001 S13514−101 S07905−001 S36556−001 ¡
L:S15735−001
L:S15737−001
148695−001
1/4(6.4) R:S15736−001 R:S15738−001 S13510−101 158756−001
S36560−001
¡
Feeddog