Singer Heavy Duty 4432

• The 2020 choice is explicitly not recommended for stretch fabrics. These are conditional alternatives, not one universal machine-wide needle type. Match size to fabric and thread.; Needle choice depends on fabric and thread. The printed table contains inconsistent size conversions (16/100 versus16/110); no universal size range or corrected conversion is asserted here.

The OEM table assigns SINGER 2020 sharp needles to natural-fiber fabrics and SINGER 2045 ball-point needles to knits and stretch fabrics, including natural and synthetic fibers. It explicitly does not recommend 2020 for stretch fabrics.

• Switch off the machine before changing the needle.

Insert the needle as far upward as possible with the flat side of its shaft facing the back, then tighten the clamp screw.

• This sequence applies only to the exact models printed on the shared manual; it does not establish bobbin equivalence or class.

Route the thread through the bobbin guide and clockwise around the tension discs, thread the bobbin, move its spindle right, wind to the automatic stop, then move the spindle left and remove the bobbin.

• The direction and routing procedure do not establish a standardized bobbin class or hook system.

With the needle fully raised and power off, insert the bobbin so it turns counterclockwise, route the thread through the case tension path, leave about 15 cm, and replace the cover.

• Only exact accepted SINGER4432 and retained dated product-page capture.
• Retain SINGER and Transparent qualifiers; transparent alone does not establish plastic/material, dimensions, OEM part number, included equipment, cross-brand substitution or retail-unit fit.
• Product HTML, not a PDF/manual or fresh current-publisher match. Retain archived capture metadata and source role.

Use SINGER Class 15 Transparent bobbins

• This is the source-named attachment procedure. It does not establish a standardized shank class, universal foot fit, or adapter compatibility.

With power off, place the ordinary foot below its holder and lower the holder until its opening is above the foot pin; the foot engages automatically. To remove it, raise the foot with the presser-foot lifter and press the holder release lever.