Source-backed model reference · US

Janome 4120QDC needle size

The exact machine name and needle system determine fit. This page transcribes the cited manufacturer manual and keeps fabric use, insertion and specialty-needle notes together.

Fabric and size chart

• Light (Lawn, Georgette, Tricot, Wool, Polyester) → #9/65-11/75
• Medium (Cotton, Polyester, Fine jersey) → #11/75-14/90; Wool → #14/90
• Heavy (Denim, Jersey, Coating) → #14/90-16/100
• Quilting → #16/100
• General sewing → 11/75 or 14/90
• Stretch, very fine fabrics, synthetics → BLUE TIPPED needle

Insert and replace

Insert a new needle into the needle clamp with the flat side to the rear; push it up as far as it will go and tighten the needle clamp screw.

Twin-needle or specialty notes

twin needle; foot Use zigzag foot A or satin stitch foot F for twin needle sewing.. Press the twin needle button; use the extra spool pin; use thin threads #60 or larger number; needle threader cannot be used for a twin needle

Other manual notes

• Needle threader can be used with a #11 to #16 needle or a blue tipped needle; thread 50 to 90.
• Replace the twin needle with a single needle when twin needle sewing is finished.

Manufacturer source

Janome 4120QDC Instruction Book ↗

Source market: US (Janome America, janome.com) / English · Checked October 20, 2026. Verify the full model label, fabric and current manual before sewing.

Check another machine · Needle size chart