Being operated not only with foot pedal,but alsowith a mounted handwheel .the sewing machinecan be equipped by an electric motor .a hand case is available for your option .JA1-1 model is desiged to have a forward and backwrqd material feeding device for double stitch withoutreversing the cloth.in addition .the JA1-1 model has a cloth feeding regulator toadjust the feeding teeth up and down.

Having been used for 100 years, this sewing machine is still popular today. With simple but reliable and strong structure, this machine is widely used in household sewing machine. It can be operated manually or by a small 90W motor that can be easily mounted on the machines. Wooden base and cover or a cast iron table and table is also supplied to you with the machine.

JA1-1: The Original, Basic Model

Household sewing machine

Other relevant  sewing machine

Stitch formationSewing machines can make a great variety of plain or patterned stitches. Ignoring strictly decorative aspects, over three dozen distinct stitch formations are formally recognized by the ISO 4915:1991 standard, involving one to seven separate threads to form the stitch.Plain stitches fall into four general categories: lockstitch, chainstitch, overlock, and coverstitch.

LockstitchLockstitch is the familiar stitch performed by most household sewing machines and most industrial "single needle" sewing machines from two threads, one passed through a needle and one coming from a bobbin or shuttle. Each thread stays on the same side of the material being sewn, interlacing with the other thread at each needle hole by means of a bobbin driver. As a result, a lockstitch can be formed anywhere on the material being sewn; it does not need to be near an edge.

ChainstitchChainstitch was used by early sewing machines and has 2 major drawbacks:The stitch is not self-locking, and if the thread breaks at any point or isn't tied at both ends, the whole length of stitching comes out. It's also easily ripped out.The direction of sewing can't be changed much from one stitch to the next, or the stitching process fails.People soon realized a better stitch was needed, and it was found in the lockstitch. The chainstitch is still used today in clothing manufacture, though due to its major drawback it is generally paired with an overlock stitch along the same seam.

OverlockOverlock, also known as "serging" or "serger stitch", can be formed with one to four threads, one or two needles, and one or two loopers. Overlock sewing machines are usually equipped with knives that trim or create the edge immediately in front of the stitch formation. Household and industrial overlock machines are commonly used for garment seams in knit or stretchy fabrics, for garment seams where the fabric is light enough that the seam does not need to be pressed open, and for protecting edges against raveling. Machines using two to four threads are most common, and frequently one machine can be configured for several varieties of overlock stitch. Overlock machines with five or more threads usually make both a chainstitch with one needle and one looper, and an overlock stitch with the remaining needles and loopers. This combination is known as a "safety stitch". Household overlock machines are widely used.

CoverstitchCoverstitch is formed by two or more needles and one or two loopers. Like lockstitch and chainstitch, coverstitch can be formed anywhere on the material being sewn. One looper manipulates a thread below the material being sewn, forming a bottom cover stitch against the needle threads. An additional looper above the material can form a top cover stitch simultaneously. The needle threads form parallel rows, while the looper threads cross back and forth all the needle rows. Coverstitch is so-called because the grid of crossing needle and looper threads covers raw seam edges, much as the overlock stitch does. It is widely used in garment construction, particularly for attaching trims and flat seaming where the raw edges can be finished in the same operation as forming the seam.