Spindle & Press

Singer 151w1 vs Union Special 51-400: Which Used Industrial Sewing Machine Fits Your Shop?

Two used industrial sewing machines, one with a walking foot for leather and vinyl, one with a double needle chain stitch for jeans and coats. Compare the $240 Singer 151w1 against the $250 Union Special 51-400 to see which fits your shop.

Last updated Aug 17, 2026

Choosing a used industrial sewing machine for textile apparel work means weighing stitch type and material compatibility before price. Two American-made workhorses show up on the used market around the same price: the Singer 151w1 at $240 and the Union Special 51-400 at $250. They solve different problems, and the right choice depends on the seams you need to sew.

Quick Verdict

If your work involves leather, vinyl, denim, or medium-weight material with a single-needle walking foot, the Singer 151w1 is the more straightforward pick. If you need to sew double-needle chain stitch seams for trousers, jeans, coats, or similar apparel, the Union Special 51-400 is the one.

Comparison Table

ProductListed PriceStitchNeedle SetupBest For
Singer 151w1$240.00Single-needle lockstitch with walking footOne needle, 135x1Material, denim, light leather, vinyl
Union Special 51-400$250.00Double-needle chain stitchTwo needles, 3/16 inch apartJeans, seaming trousers, pants, coats

Where Each Product Wins

  • Singer 151w1 costs $10 less and brings a walking foot, which gives better control when sewing thicker or slicker layers like leather and vinyl. The single-needle lockstitch is a familiar, straightforward stitch for a small shop.
  • Union Special 51-400 delivers a double-needle chain stitch with a fixed 3/16-inch spacing, a setup that suits the parallel seams common in jeans, trousers, and coat construction.

Product Notes

Vintage Industrial Sewing Machine Singer 151w1one needle walking foot-Leather

Vintage Industrial Sewing Machine Singer 151w1one needle walking foot-Leather

The Singer 151w1 is a single-needle industrial machine with a walking foot, built in the United States. For $240, you get a used lockstitch machine that handles material, denim, light leather, and vinyl. The attribute list confirms the needle size as 135x1 and mechanical control. The trade-off is that this auction covers the machine head only, so you need to add a table and motor. It also comes from surplus stock and may need a bit of cleaning before it sews.

Industrial Sewing Machine Union Special 51-400 double needle chain

Industrial Sewing Machine Union Special 51-400 double needle chain

The Union Special 51-400 asks $250 and brings a double-needle chain stitch with needles spaced 3/16 inch apart. That setup is suited for operations like seaming trousers, pants, jeans, and coats. The machine is also used, mechanical, and made in the United States, with a two-needle head. Keep in mind the listing includes a California Prop 65 warning, so review what that means for your workspace. If your projects need two parallel rows of chain stitches, this is the clear reason to pick it over the Singer.

Final Choice by Use Case

Choose the Singer 151w1 when your daily work revolves around single-needle lockstitching through denim, light leather, vinyl, or other medium-weight materials, and you are ready to supply a table and motor. Choose the Union Special 51-400 when your orders lean toward jeans, trousers, pants, and coats that need a sturdy double-needle chain stitch, and you accept the slightly higher $250 price and the fixed needle spacing.

Products in this article
Vintage Industrial Sewing Machine Singer 151w1one needle walking foot-LeatherUSD 240.00View on eBayIndustrial Sewing Machine Union Special 51-400 double needle chainUSD 250.00View on eBay
Vintage Industrial Sewing Machine Singer 151w1one needle walking foot-LeatherUSD 240.00View on eBayIndustrial Sewing Machine Union Special 51-400 double needle chainUSD 250.00View on eBay

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