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13 Cards in this Set

  • Front
  • Back
WHAT IS COVERED IN THE NAVAIR A6-215PC-MEB-000 WP 003
PRINCIPLES OF OPERATION
INDUSTRIAL SEWING EQUIPMENT
Oscillating sewing machines have a sewing hook that?
rocks back and forth
Rotary sewing machines have a sewing hook that makes?
two complete revolutions to complete on stitch
Two Oscillating sewing machines are the______
31-15 and 7-33
When a machine is in constant use it should be oiled?
twice a day
If a machine skips stitches or frays or breaks it is because?
The needle is not in proper relationship with the shuttle
If the needle is in proper time with the shuttle the point of the shuttle should be where in relation to the eye of the needle?
1/16 in above the eye of the needle
If the feed dog is set to high what will happen
It may cut or fray the material
The bobbin will rotate in what direction if the bobbin case has been threaded properly?
clockwise
commonly used navy Rotary sewing machines are the?
111 w series 150-155
I right twist or left twist thread used in sewing machines
left twist is used. right twist tends to unravel.
Is Z twist Left twist or Right twist?
Left twist
Is S twist Left twist or Right twist?
Right twist.