Parts of a Lockstitch Sewing Machine PDF

Different Parts Of Sewing Machine And Their Functions The basic structure of sewing machine is the same whether it is hand- operated sewing, treadle sewing machine or electric sewing machine. Let us continue the discussion with the different parts of a lockstitch sewing machine and their fun...

Different Parts Of Sewing Machine And Their Functions The basic structure of sewing machine is the same whether it is hand- operated sewing, treadle sewing machine or electric sewing machine. Let us continue the discussion with the different parts of a lockstitch sewing machine and their functions. Two Major Parts of the Lockstitch Sewing Machine The two major parts of the lock stitch sewing machine are the upper parts and lower parts. Upper Parts Lower Parts The upper parts are composed of the following: 1. Head is the complete sewing machine without a cabinet or stand. 2. Arm is the curve part of the head containing mechanism for operating the needle. 3. Bed is the flat portion of the machine and beneath is the feed dog where it is mounted, and the shuttle and lower thread are placed. ARM HEAD BED 1 Parts of the Sewing Machine in the Arm and Head 1. Spool Pin is the thread holder. 2. Thread Guide keeps the thread in position. 3. Thread Take up Lever releases the thread and interlocks with the bobbin thread. 4. Presser bar lifter moves the presser foot. 5. Tension screw controls the looseness and tightness of stitches. 6. Needle Bar holds the needle in place. 7. Needle Clamp holds and tightens the needle. 8. Presser Foot holds the fabric in place while sewing. 9. Presser Bar a bar to which the presser foot of a sewing machine is attached. 10. Needle is a slender tool attached in the needle clamp used for sewing. 11. Bobbin Winder controls the bobbin while winding thread. It has three parts namely: a. Latch it fastens the bobbin in the spindle while winding the threads b. Spindle is a slender rod by which the threads is twisted in a spinning wheel. c. Rubber ring is a ring on the bobbin winder which comes in contact with the nut of the balance wheel. 12. Stitch regulator checks the length of the stitches. 13. Balance Wheel sets the mechanism in motion. 14. Belt connects the balance wheel to the drive wheel. 15. Stop Motion Screw hinders moving when loosened and starts. 16. Face Plate a cover that encloses the oiling points of the needle bar, presser bar and the take up lever. 2  Thread take up lever Stop Motion Screw Belt Parts of the sewing machine in the Arm and Head Parts of Sewing Machine in the Bed or Under the Bed 1. Feed Dog moves the fabric while sewing. 2. Throat plate is the windows of the feed dog and it is where the bobbin threads come out. 3. Slide plate is a movable plate that covers the shuttle and bobbin case. 4. Shuttle holds the bobbin case while sewing. 5. Bobbin is a metal spool for winding thread. 6. Bobbin Case holds the bobbin. NEEDLE BAR PRESSER BAR 5 BOBBIN NEEDLE CLAMP NEEDLE PRESSER FOOT 4 Parts of the sewing machine in the bed or under the bed 3 The Lower Parts of the Lock Stitch Sewing Machine The lower parts of the sewing machine are the cabinet and the stand. The cabinet has drawers and screw on the hinges for the attachment of the head. The following are the lower parts of the sewing machine and their uses: 1. Band Wheel leads the balance wheel through the belt connection. 2. Band Wheel Crank moves the band wheel. 3. Pitman Rod holds the treadle to band wheel crank. 4. Belt Guide holds the belt to its place. 5. Belt Shifter removes the belt from the wheel. 6. Dress Guard protects the dress from the wheel. 7. Treadle is where the feet are stationed to drive the band wheel through the pitman rod. 8. Legs support the cabinet of the machine. 9. Cabinet holds the head of the machine by interlocking screw on the hinges. 10. Drawers are used for storing sewing accessories and tools such as pins, needles, threads, scissors, tape measures, etc. 11. Extension leaf is used to enlarge the bed plate of the sewing machine and to give support to the left hand of the operator. 11 EXTENSION LEAF BELT GUIDE 10 BELT SHIFTER SHIFTER DRAWER(S) DRESS GUARD GUGGGUA TREADLE LEG(S) The lower parts of the lockstitch sewing machine 4  Activity 1 - Labeling Directions: Identify the different parts of a lockstitch sewing machine. Write your answer in your TLE notebook. 30 27 29 28 19 1 18 20 22 21 24 26 25 23 5