leather_craft

To calculate lace length neeeded for belt:

"Take the person's waist measurement and multiply it by 3.The scale below gives the person's waist measurement , the number of strands to cut and the length of the strands" (from page 16 of BUSH LEATHERWORK by RON EDWARDS)

table from page 16 of BUSH LEATHERWORK by RON EDWARDS

To calculate how long lease you can cut-put from given leather (square shape ) size:

1. Open calc file. define leather square size, define middle cut-out radius part and lace width. Read calculated length S.

Or calculate from table:

for example like that:

1. desired lace width w = 3 mm
2. given leather square size b= 120 mm
3. read value from table for given w and b : S1= 377 cm
4. We cut out from the inside to outside of leather, so we need cut out some circular hole (waste), let say , diameter b0 = 20 mm . so for w = 3 and b=20 we reas S0 = 11 cm
5. total length of the cut strip: S = S1 - S0 = 377 - 11 = 366 cm

Note: in reality we cut-out a litle shorter strap since at the end of cutting (close to the edge) lather can wrinkle, or we can cut out circular hole not in exact in the middle - so take into account.