TechSew Cylinder Arm, Post Bed and Flat Bed Leather Vinyl Canvas Stitching, Industrial Upholstery and Fur Sewing Machines, Sergers, Zigzag ServoMotor |
Needle & Thread Size Compatibility Chart for Industrial Sewing Machines(.PDF)
Here is a leather oz/ thickness chart:
ORGAN LEATHER POINT NEEDLES:
Diamond Point and Tri Point are for hard leathers such as belts(cardboard) -- -- -- -- -Diamond Points have a smaller neater hole -- -- -- -- Tri Point hole is like a nail
Narrow Wedge and Reverse Twist are for softer leathers -- -- -- -- -- holes look like a knife slice
SD1 Round Tri Tip/PD -- -- -- -- Smaller, neater holes, occupies about 10% of needle hole
M-LL, M-D, etc - Approximately half the size of standard Wedge and Triangle point needles.