Technical Data & Engineering Charts
Monofilament Conversion Tables & Specifications
Reference charts for commercial pelagic and bottom longline mainlines, branchlines, and leader lines. Calculate line diameters, test ratings, and spool yields.
Commercial Monofilament Mainline & Leader Specs
Standard nylon monofilament breaking strength & length ratios
| Line Diameter (mm) | Line Diameter (Inches) | Pound Test Rating (lb) | Approximate Yards / Lb | Recommended Application |
|---|---|---|---|---|
| 0.80 mm | 0.031" | 80 lb | 1,150 yds | Light branchlines & leader line |
| 1.00 mm | 0.039" | 100 lb | 780 yds | Light branchlines & leader line |
| 1.20 mm | 0.047" | 150 lb | 540 yds | Light branchlines & leader line |
| 1.50 mm | 0.059" | 200 lb | 350 yds | Heavy pelagic branchlines & gangions |
| 1.80 mm | 0.071" | 300 lb | 240 yds | Heavy pelagic branchlines & gangions |
| 2.00 mm | 0.079" | 400 lb | 190 yds | Heavy pelagic branchlines & gangions |
| 2.50 mm | 0.098" | 600 lb | 125 yds | Heavy longline mainline & buoy lines |
| 3.00 mm | 0.118" | 800 lb | 85 yds | Heavy longline mainline & buoy lines |
| 3.50 mm | 0.138" | 1,000 lb | 62 yds | Light branchlines & leader line |
| 4.00 mm | 0.157" | 1,200 lb | 48 yds | Light branchlines & leader line |
Note on Monofilament Tolerances:
Values are approximate standards. Breaking strength tests conducted at standard room temperature. Custom diameters, colors (Clear, Dark Green, Smoke, Hi-Vis Yellow), and pre-cut leaders are available upon request.
Wire Rope & Chain Safety Load Factors
When rigging commercial trawl doors, longline setting blocks, or anchor ground tackle, maintain a minimum 5:1 safety factor on wire rope and 4:1 on Grade 43/70 transport chain.
- Grade 43 Galvanized Chain: High strength-to-weight ratio
- 6x19 Stainless Wire Rope: Corrosion resistant deck wire
- Heavy Crane Swivels: Prevents line twist during deep sets