Machines
Singer Heavy Duty 4423 specs and buying notes
Published maker specifications, documented features and buying questions. Source read 2026-11-04.
mechanical
Source: Singer 4423 read 2026-11-04
| Machine type | mechanical |
|---|---|
| Built-in stitches | 23 |
| Buttonhole | One-step; style count not published |
| Maximum stitch width (mm) | 6 |
| Maximum stitch length (mm) | not published |
| Sewing speed (stitches/min) | 1100 |
| Arm / throat space (as printed) | 6.25" needle to tower; 4.25" height |
| Weight (as printed) | 14.6 (unit not labelled) |
| Free arm | Yes |
| Needle threader | Built-in |
| Drop feed | Yes |
| Embroidery field (inches) | not published |
| Warranty (as printed) | 90 day / 2yr / 24yr (specification row) |
| Maker list price (USD) | $289.99 |
| Heavy fabric documentation | Denim and canvas |
What should you check before buying?
- Stitch applications are techniques, not built-in stitches. The catalogue uses the built-in stitch count.
- Singer documents denim and canvas but does not publish a maximum stack thickness.
- The warranty specification row differs from the separate up to 25 years banner. Confirm the detailed warranty before buying.