Technical Tips

Double seam dimensions

double seam diemsions diagram

Key
a = actual overlap
b = body hook butting (b/c * 100)
c = body hook butting (b/c * 100)
d = body hook length
e = countersink depth
f = seam length
g = end hook length
h = seam thickness
i = seam gap



 

Standard Dimensions
  csnk seam
length
seam
thickness
body
hook
e.h.
length
e.c.
b.w.
thickness
overlap %bhp
standard seam                  
inches 0.124 0.115 0.0445 0.0825 0.0735 0.0080 0.0085 0.051 83
mm 3.14 2.90 1.13 2.09 1.86 0.20 0.21 1.29  
miniseam / euroseam                  
inches 0.126 0.102 0.0400 0.0755 0.0660 0.0070 0.0062 0.047 86
mm  3.20 2.59 1.01 1.91 1.67 0.18 0.16 1.19  
microseam                  
inches 0.081 0.058 0.0385 0.0385 0.0370 0.0062 0.0062 0.026 85
mm 2.05 1.46 0.97 0.97 0.93 0.16 0.16 0.66