By Length = count

Nm
(Metric number)

Nm = Length in meters per 1g

Nm = m / 1g

Single yarns
(Spinning fibers)

Nm 24 Z 660

• Nm = Metric Number
• 24 = weigh 24 meter of yarn 1g
• Twisting single yarn with Z-twist
• 660 = number of twists in 1m

Nm 24

Plied yarns

1. Same yarns: 2 x Nm 50 S 900

• 2 x = two yarns are processed parallel together
• Twisting single yarn with S-twist

2 x Nm 50

(Nm 25)

Different yarns: Nm 40 S 800 + Nm 50 Z 900

• + = Connection of the two specifications of the respective single yarns

Nm 40 + Nm 50

(Nm 22)

Folded yarns

Same yarns: Nm 20 S 800 /2 Z 600

• /2 = two plied yarns are twisted together
• each initial plied yarn has Nm 20 with S twist
• the final plied yarn has Nm 20/2 = Nm10 with Z twist

Nm 20 /2

(Nm 10)

Same yarns: Nm 60 S 800 /3 Z 600

• /3 = three plied yarns are twisted together
• each initial plied yarn has Nm 60 with S-twist
• the final plied yarn has Nm 60/3 = Nm 20 with Z-twist

Nm 60/3

(Nm 20)

:
The twisting direction of the final plied yarn is normally opposite to the twisting direction of the single yarns or of the initial plied yarn.