Sailrite Ultrafeed LS
Portable heavy-duty straight-stitch walking-foot sewing machine
Sailrite specifies needle systems 135x16 and 135x17 for the Ultrafeed LS.
Verified compatibility
3 verified relationships.
| Part or system | Relationship | Status | Evidence note |
|---|---|---|---|
| Needle System 135x16 | Officially compatible | CONFIRMED | Sailrite specifies needle systems 135x16 and 135x17 for the Ultrafeed LS. |
| Needle System 135x17 | Officially compatible | CONFIRMED | Sailrite specifies needle systems 135x16 and 135x17 for the Ultrafeed LS. |
| Sailrite A036 Presser Foot Screw | Officially compatible | CONFIRMED | Sailrite lists A036 for both inside and outside presser feet on the Ultrafeed LS. |
Manuals
Verified official manuals matched to this exact machine record.
Machine specifications
- Needle systems
- 135x16 and 135x17
- Needle size range
- #10 to #22
- Feed
- Walking foot
- Stitch type
- Straight stitch only
- Maximum stitch length
- 6 mm
- Presser-foot lift
- 9.5 mm / 3/8 in
- Maximum listed speed
- 550 stitches per minute with WorkerB balance wheel
- Needle-bar stroke
- 34 mm
- Underarm space
- 7 x 4.5 in
- Lubrication
- Manual
About this machine
The Sailrite Ultrafeed LS is the straight-stitch-only version of Sailrite's portable Ultrafeed walking-foot platform. It accepts systems 135x16 and 135x17 needles in sizes #10 to #22, sews stitches up to 6 mm long and is rated from one stitch per second up to 550 stitches per minute with the current WorkerB balance wheel.
LS means straight stitch only
Sailrite explicitly identifies the LS as the straight-stitch-only Ultrafeed. The LSZ adds zigzag, a stitch-width lever and left-center-right needle positioning. Those are model differences, not optional settings hidden on the LS.
The narrower foot is useful in tight work
Sailrite's comparison gives the LS a 15 mm straight-stitch walking presser foot and the LSZ a wider 19 mm zigzag foot. Sailrite specifically notes that the narrower LS foot is easier to place in tight upholstery and bag corners.
What this machine is used for
- Canvas
- Sailmaking
- Upholstery
- Canvaswork
- Boat covers
- Bags
- Leatherwork
- RV and automotive upholstery
Sources and scope
Compatibility is limited to facts explicitly stated in the cited manufacturer documentation.
- Sailrite Ultrafeed LS Walking Foot Sewing Machine Package Sailrite · Official product or support page · Tier 2
- Sailrite documentation Sailrite · Documentation · Tier 2
- Sailrite technical document Sailrite · Technical document · Tier 2
- Presser Foot Screw for Ultrafeed and Leatherwork Sailrite · Official replacement-parts page · Tier 1
Catalog source-link check completed September 2026. This maintenance check did not reverify every factual claim. See how factual verification differs from maintenance checks.