Needle Systems for Different Sewing Machine

A needle system defines the dimensions of a needle to suit the machine type. Needle systems are classified based primarily on three measurements: eye to butt length (D), shank length (N), and shank diameter (A), and specific to different stitch classes. 
Needle systems are expressed as alphanumeric code with a multiplication sign within. For example, DBX1 is also referred as 16X231 and TQX1 is also referred to as 175X1. To date, there is no uniform categorization of needle system numbers across major needle manufacturers. It is advisable to check with the machine manufacturer for the suitability of the needle system to the machine.

Every machine manufacturers suggest needle systems in their machine catalog for a specific sewing machine. The following table is prepared based on Asian (organ) needle systems, each of them is available in different sizes.

Stitch Class
Machine Types
Needle System
100
(Single Thread Chain Stitch)
Single-thread, Chain Stitch
TVX7
Single-thread, Chain Stitch Buttonholing
DBX1
Single-thread, Chain Stitch, Button Sewing
TQX1, TQX7
Blind Stitch
LWX6T,
Saddle Thread
CPX1J , CPX12J
300
(Lock Stitch)
Single Needle Lock Stitch
DBX1, DBX5, DAX1
Double Needle Lock Stitch
DPX5
Zigzag Stitching Machine 1 step
DBX1B, DPX5
Zigzag Stitching Machine 3 Steps
134 SUK
Cylinder Bed Lock Stitch
UY180GVS
Post Bed Lock Stitch
TVX7, DPX17
Bartacking
DPX5, DPX17
Straight  Lock Stitch Buttonholing
DPX5
Eyelet Buttonholing
DOX558
Lock Stitch Button Sewing
DPX17
Sleeve Setting Machine
DPX17
2-needle, Automatic Welting Machine
DPX17
Automatic Belt-loop Attaching Machine
DPX17
400
(Multi Thread Chain & Bottom Cover Stitch)
Flat-bed, 1-needle, Double Chain Stitch 
TVX7
Flat-bed, 2-needle, Double Chain Stitch
TVX7
Raised-bed (Flat Lock) 2-Needle Bottom Covering Chain Stitch
UY128GAS
Raised-bed (Flat Lock) 3-Needle Bottom Covering Chain Stitch
UY128GAS
Cylinder Bed, 2-Needle Bottom Cover Chain Stitch
UY128GAS
Cylinder Bed, 3-Needle Bottom Cover Chain Stitch
UY128GAS
Feed-off-the-arm, 2-Needle, Double Chain Stitch (Light Wt.)
TVX64
Feed-off-the-arm, 3-Needle, Double Chain Stitch (Medium Wt)
UY128GAS
Feed-off-the-arm, 3-Needle Double Chain Stitch (Ex. Heavy Wt.)
UY130GS
Kansi Special
UOX113, UYX113
Multi Needle Shirring/Smocking
DVX57, UOX113
500
(Over Edge Chain Stitch)
1-Needle, Three Thread Over lock
DCX1, DCX27
2-Needle, Four Thread Over Lock
DCX1, DCX27
2-Needle, Five Thread Safety/ Interlock
DCX27
3-Needle, Six Thread Safety/ Interlock
DCX27
Over Lock/ Safety (Heavy Materials)
DOX5
600
(Top-Bottom Covering Chain)
Raised-bed (Flat Lock) Top and Bottom Covering Stitch
UY128GAS
Cylinder-bed, Top and Bottom Cover stitch
UY128GAS
Feed-off-the-arm,4-needle, Top & Bottom Cover stitch (Flat seamer)
FLX118GCS, & FLG-8

Source: Juki, Brother, and Kansai

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