Photo: Jack
SewingSpecs does not sell and does not show shop prices: check the price where you buy.
The JK-58450J is a computerized two-needle lockstitch machine: seams stay parallel until a corner comes up, because the needle bars can be disengaged one at a time. Press the pedal, the machine sews the preset number of stitches with a single needle, stops by itself so the work can be turned, then lowers the second needle again once sewing resumes. The parallel seam holds up on denim, upholstery and technical goods where two rows of stitching share the strain.
The hook is the small type, suited to fine threads; the gauge between the needles is fixed at 6.4 mm and is not selectable at order. Thread trimmer, backtacking and an automatic presser foot lifter are built into the head, and voice guidance walks through the panel settings.
This is an industrial head, not a home machine: it mounts on a table with a motor, neither of which is included.
| Parameter | Value | Source |
|---|---|---|
| Maximum speed | 3000 spm | Declared by the brand |
| Material weight class | Light, Heavy | Declared by the brand |
| Maximum stitch length | 5 mm | Declared by the brand |
| Presser foot lift (hand) | 7 mm | Declared by the brand |
| Maximum presser foot lift | 13 mm | Declared by the brand |
| Needle system | DPx5 | Declared by the brand |
| Needle distance | 6.4 mm | Declared by the brand |
| Needle size range | 11-16#/14-22# | Declared by the brand |
| Automatic functions | Automatic thread trimmer, Automatic foot lifter, Automatic backtack | Declared by the brand |
| Hook capacity | Small hook | Declared by the brand |
Chosen by the declared use tier and footprint, not by price: we don't publish prices.
Same tier, different manufacturer
