Spools

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American standard

Spool type D in. d in. d1 in. L in. I in. Wire type
2.125" Flange 2.125 1.375 5/8 1.375 1 0.0005 - 0.002
2.5" Flange 2.5 1.76 5/8 3,376 3 0.007 - 0.0031
3.15" Flange 3.15 1.97 5/8 3.15 2.52 0.002 - 0.0063
3.5" Flange 3.5 2.125 2.125  2.438 2.125
5" Flange 5 3 5/8 4.11 3.5 0.0035 - 0.113
6" Flange 6 3.5 5/8 4.11 3.5 0.005 - 0.0253
PT 4 Tapered 5.5 & 4.875 4.375 & 3.875 1 7.875 6.688 0.003 - 0.008
PT 10 Tapered 7.087 x 6.300 4.331 x 3.780 1 9 7.875 0.004 - 0.010
12" Reel 11.75 8 2 3.938 3.62
Anodized Band Spool 2.24 1.98 1.93 1.1 1 Bonding wire

Metric

Spool type D mm d mm d1 mm L mm I mm Wire size mm Ø Normal net weight, kg
C 1/4 64 44 16 61 51 <0.030 0.05 - 0.25
C 1/2  64 44 16 86 76 0.030 - 0.099 0.5
B 1 75 40 16 120 100 0.1 - 0.199  1.0
B 2 90 40 16 120 100 0.20 - 0.25 2.0
B 4  120 50 16 120 100 0.26 - 0.50  4.0

Standard DIN spools

Spool type D mm d mm d1 mm L mm I mm Wire size mm Ø Normal net weight, kg
DIN 50 50 32 11 50 38 0.015 - 0.04 0.10
DIN 63 63 40 11 63 49 0.015 - 0.04 0.20
DIN 80 80 50 16 80 64 0.05 - 0.099 0.75
DIN 100 100 63 16 100 80 0.10 - 0.50 1.5
DIN 125 125 80 16 125 100 0.15 - 0.80 3.0
DIN 160 160 100 22 160 128 0.25 - 0.71 5.0
DIN 200 200 125 36 200 160 0.4 - 0.81 10.0
DIN 250 250 160 36 200 160 0.4 - 1.5 20
DIN 355 355 225 36 200 162 1.0 - 3.0 40
SK 460 460 318 305 105 91 0.25 - 1.8 45

Steeger bobbins

Sizes D / d x I
40 / 30 x 26 mm
40 / 16 x 26 mm
40 / 25 x 26 mm