Sailrite Industrial Sewing Machine

Sailrite Sewing Machine User Guide

The Sailrite is a sewing machine that works similarly to the Singer but can be used for thicker or stronger fabrics. The Sailrite can duplicate the functions of the Singer but is often overkill on thinner fabrics. You should only use this tool when the material requires it. This sewing machine only sews straight stitches.

Safety Considerations

  • Fast Moving Needle: The sewing machine uses sharp needles and moves them very quickly. Make sure not to let your fingers under the needle, as you could sew it into your skin.
  • Sharps Disposal: If the sewing needle breaks, carefully put the broken piece in the yellow sharps container, and find an Explorer to help you change the needle.

Machine Anatomy

Sailrite sewing machine with parts notated, see "Machine Anatomy" for parts and descriptions, Northeastern Makerspaces

Operating the Machine

Setting up the Machine

Understanding the Posi-pin

  1. The Sailrite Ultrafeed has a unique feature of the Posi-pin, a pin that controls whether or not the needle moves when using the hand wheel or foot pedal. Before setting up the machine and sewing with it, you must make sure the Posi-pin is in the correct position for that task:
    1. Winding the bobbin: Disengaged
    2. Threading the top of the machine: Engaged
    3. Sewing: Engaged
  2. Steps to Engaging the Posi-pin
    1. Remove the Posi-pin from the metal disk at the center of the hand wheel, this is the Posi-pin Keeper 
    2. Push the pin into the hole next to the metal disk on the hand wheel 
    3. Apply light pressure until the pin slots in, or you hit metal 
    4. If the Posi-pin has not gone all the way in, rotate the hand wheel until the pin drops into one of the four holes inside the hand wheel 
    5. The pin should be able to be pushed in and spring out a little bit 
  3. Steps to Disengage the Posi-pin
    1. Remove the pin from the hand wheel
    2. Place the Posi-pin in the keeper
Engaging the posi-pin in a Sailrite sewing machine, Northeastern Makerspaces

Winding the bobbin

Bobbin winder of the Sailrite machine.

The circled section of the machine is the bobbin winder. It has two important components: The bobbin winder spindle, at the front, is what holds the bobbin. The thread tensioner, at the back, controls the thread as the bobbin is being wound.  

  1. Start by disengaging the Posi-pin and putting it in the keeper. 
  2. Take your empty bobbin and put it on the bobbin winder spindle. It should be a tight fit! If the bobbin can turn freely on the spindle, take a flathead screwdriver and pry the two prongs apart a bit.
Disengaged Posi-pin.

3. If there’s no thread on the holder behind the machine, place a spool of thread on one of the cone shaped thread stand and run the end of the thread through the guide hole above, then down to the machine.

Thread cone on the back of the Sailrite machine.

4. Take the end of the thread and pull it through the small white hole by the thread tensioner. Then, slot it between the metal disks of the tensioner, and pull it behind and under.  

Thread in the thread tensioner.

5. Put the thread through one of the holes of the bobbin, from inside to out. Leave a tail of about 8 inches.

6. Push the lever in front of the bobbin spindle down. This will push the wheel behind the bobbin spindle against the rubber belt of the machine.

7. Hold the thread tail, and gently press the foot pedal to wind the bobbin

8. To avoid damaging the machine while sewing, only wind the bobbin to about 80% full. When you think you’re about done, snip both threads and pull your wound bobbin off the spindle.

Threading the bottom of the machine

  1. Pull the tab on the front of the bobbin case out in order to remove the bobbin case from the machine 
  2. Insert the bobbin into the bobbin housing so the thread rotates clockwise.
Bobbin inserted into casing with thread rotating clockwise, Northeastern Makerspaces
  1. Pull the thread counterclockwise through the slit to the opening at the top of the bobbin case. 
  2. Pull the front tab again and re-insert the bobbin casing into the housing.
  3. The casing should click into place. Make sure that the nub by the front tab (G) is NOT in cutout I or H, as this will cause the machine to get stuck.
Bobbin casing in its housing.

Threading the top of the machine

Threading the sewing machine.
Closeup of threading top of Sailrite machine.

Picking up Bobbin Thread

Instructions for pulling up bobbin thread.

Stitch length, Reversing, and Speed settings

  1. Stitch length is altered with the wheel at the front of the machine. To set stitch length, make sure your presser foot is up, then push the tab labeled “push” on the stitch wheel while also pushing down the reverse lever. This allows you to move the wheel to adjust stitch length. Industry standard is 2.5mm.
  2. To sew in reverse, push down on the reverse level on the front of the machine. 
  3. Above the on switch is a display that shows the top speed of the machine. It can go very fast as it’s an industrial machine, but for safety purposes we will keep this at 5. 

Sewing with the Sailrite

Using the presser foot: 

The way the presser foot functions on the Sailrite is a bit different from other machines. The Sailrite has the unique feature of a knee-lift: the gray circular pad below the table. This is used to raise and lower the presser foot, and as the name indicates, can be operated with your knee. Before you start sewing, it’s important to understand how this works.  

  1. Locate the foot lock lever behind the machine near the presser foot. Make sure you can find this by feel, since craning around to see it is difficult while sewing 
  2. Use your knee to press the knee lift to the right and up. You should see the presser foot rise as you do 
  3. Keeping the presser foot up, reach behind the machine and flip the foot lock lever up. Now you should be able to take pressure off the knee lift and the presser foot will stay locked up 
  4. Position your fabric under the presser foot, then reach behind the machine and flip the lever back down. The presser foot should snap down to hold your fabric in place. Now you’re ready to sew! 
Foot lock lever.

Begin sewing:

  1. Once you have your fabric in place, gently press down on the foot pedal to sew a few stitches 
  2. Hold down the reverse lever to sew backward over these first few stitches. This locks your stitches into place and prevents them from unraveling. 
  3. Continue to sew forward until you reach the end of your piece. 
  4. Hold the reverse lever down and sew backward over the last few stitches. 
  5. Turn the hand wheel on the side of the machine towards you to raise the needle out of the fabric. If you wanted to turn the fabric and continue sewing, don’t raise the needle during this step. 
  6. Raise the presser foot using the knee lift. If you want to reposition your fabric and continue sewing, turn your fabric with the presser foot raised, then lower the foot once you have it in place.  
  7. Gently pull your piece away from the machine and cut the threads.