Sewing Machine Parts and Functions

• Parts of a sewing machine include:

  A) Stop Motion Screw

  B) Bobbin Winder

  C) Belt

  D) Stitch Regulator

  E) Bed

  F) Center Drawers

  G) Dress Guard

  H) Drive Wheel Crank

  I) Balance Wheel

  J) Drive Wheel

  K) Stand

  L) Pitman Rod

  M) Treadle

  N) Leg

  O) Spool Pin

  P) Presser Foot Lifter

  Q) Tension Regulator

  R) Face Plate

  S) Needle Clamp

  T) Slide Plate

  U) Extension Leaf

  V) Cabinet

  W) Drawers

  
• Sewing machine is used to put together two or more pieces of material or to stitch decoration on a fabric.
• The three main parts of a sewing machine are the cabinet, stand or steel framework, and the head.
• The cabinet consists of the drawers and the extension leaf.
• The stand or steel framework consists of the treadle, belt guide, drive wheel, pitman rod, drive wheel crank, and the leg.
• The head consists of the arm, balance wheel, bobbin winder, face plate, feed dog, feed dog regulator, needle clamp, pressure bar, pressure bar lifter, shuttle, spool pin, stitch regulator, stop motion screw, thread guide, thread take-up lever, throat plate, upper tension, bobbin, and bobbin case.
• The thread handling parts consists of spool pin, upper thread guide, tension assembly, thread take-up lever, lower thread guide, needle, needle clamp, bobbin, bobbin case.
• The fabric handling parts consists of the presser foot, feed dog, throat plate, stitch, feed throw out knob.
• The drawers keep materials for sewing.
• The extension leaf covers the cabinet.
• The foot rests on the treadle, which moves the drive wheel.
• The belt guide holds the belt in place.
• The drive wheel moves the balance wheel.
• The pitman rod connects the treadle to the drive wheel crank.
• The drive wheel crank turns the drive wheel.
• The leg supports the stand.
• The arm carries the whole part and the important mechanisms.
• The balance wheel is found at the right of the bobbin winder. It starts mechanism alongside the drive wheel.
• The bobbin winder winds the thread in the bobbin that is used for lower threading.
• The 3 parts of the bobbin winder are:

  Spindle

  Rubber wheel

  Latch
• The spindle is where the thread is inserted.
• The rubber wheel rubs against the balance wheel and turns the bobbin winder.
• The latch keeps the bobbin in place while winding.
• The face plate covers the left end head on which the needle bar and thread take-up lever are located.
• The feed dog moves the material as it stitches. It is found in the middle of the face plate.
• The feed dog regulator is used to adjust the height of the feed dog.
• The needle clamp holds the fabric against the feed dog. It is found at the middle of the face plate.
• The pressure bar holds the pressure foot and needle.
• The pressure bar lifter lowers and raises the presser foot. It is located on the slot of the face plate.
• The shuttle holds the bobbin and bobbin case in place.
• The spool pin holds the spool of the thread. It is found at the top right part of the arm.
• The stitch regulator is used for reverse stitching. It controls the length of the stitches and it is found below the spool pin.
• The stop motion screw is used to release or tighten the movement of the needle bar. It is located at the center of the balance wheel.
• The thread guide guides the upper threading.
• The thread take-up lever controls the flow of needle thread and is found above the tension regulator.
• The throat plate gives the needle access to the lower thread through the feed dog. It is found at the bottom of the presser foot.
• The upper tension regulates the tightness or looseness of the stitches. It is found at the middle of the face plate.
• The bobbin is the spool for the lower thread.
• The bobbin case holds the bobbin.