Union Special Machine Company - Products

Flatbed Two & Three Needle
Chainstitch

Lapseaming of medium to heavy weight
materials - FS311L51, L52, L53 subclasses:
Two needle or three needle full felled seaming

Model Number
FS311L51 FS311L52 FS311L53

2H 3H

Needle 128GAS080/032~150/060

Material Weight medium to heavy denim, cotton duck, wool

Stitch Length Adjustment by adjusting knob

Differential Feed
(FS312S21only)
Adjustment by lever adjustment mechanism

Ratio 1:0.7~1:1.3

Needle Bar Stroke 35mm

Lubrication automatic

Lubricating Oil Union Special Spec 175 (ISO grade 22)

Stitch Type 401

Seam Type LSc-2 LSc-2 LSc-3 LSc-3

FS311L51-2H64	2	4	6.4mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L51-2H72	2	4	7.2mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L52-2H64	2	4	6.4mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L52-2H72	2	4	7.2mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L52-3H32	3	6	3.2mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L52-3H36	3	6	3.6mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L53-3H32	3	6	3.2mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM
FS311L53-3H36	3	6	3.6mm	2.1~3.6 (2.8 standard)	11mm	6000 RPM

FS300 Two and Three Needle
Chainstitch Styles without Puller

These styles are also available with a CC2 Air–Klipp ®
chain cutter device

FS311L51-2H64/72
2 Needle Double Lap Seamer
Plain feed, high capacity, with "Compact Tractor" type
presser foot, flat chaining parts, and double lap seam
folder with 2.4mm capacity. For attaching risers to jeans, attaching bibs to overalls, and piecing sleeves to jackets made from medium to heavy denim, cotton duck. (Similar
to 56500R16/18.)

FS311L52-2H64/72
2 Needle Double Lap Seamer
Plain feed, high capacity, with "Tractor" type presser foot,
flat chaining sewing parts, and double lap seam folder with 2.4mm capacity. For lap seaming on denim jeans, jackets, coveralls, coats, overall bibs and similar garments of medium to heavy denim and cotton duck.

FS311L52-3H32/36
3 Needle Double Lap Seamer
Plain feed, high capacity, with "Tractor" type presser foot,
flat chaining sewing parts, and double lap seam folder with 3.2mm capacity. For lap seaming denim jackets, wind breakers, mackinaws and similar garments of medium to heavy denim, and cotton duck . (For similar style with puller, see FS316L61-3H~.) (Similar to 56900P8/9.)

FS311L53-3H32/36
3 Needle Double Lap Seamer
Plain feed, high capacity, with "Tractor" type presser foot, 1.8mm-stepped chaining and sewing parts, and double lap seam folder with 3.2mm capacity. For lap seaming denim seat seams, jeans, overalls, jackets and similar garments
of medium to heavy demin and cotton duck. (For similar
style with puller, see FS316L63-3H~.) (Similar to 56900R8/9.)

This chart outlines the key elements of the FS300 numbering system.
When ordering, styles must follow this system.