Nextflex Calculator & Selector
Enter segments manually, or upload a manifold drawing PDF to auto-detect dimensions.
Units
All calculations done in mm — part numbers are always mm-based.
Segments
No segments added yet. Add a straight or bend segment above.
Straight lengths are summed directly (no expansion factor). Bend length = 2 × π × R × (C/360), then multiplied by the expansion factor from the Nextflex Table 1 chart based on groove diameter and bend radius. Quantity multiplies each segment before summing. The recommended part number is selected from the official Nextflex catalog and rounds up to the next available size for your diameter (skipping one more size if within 10 mm).
Stock item
Special order / non-stock
How To Manually Calculate Adjusted Heater Length
Table 1 - Expansion Factors
Diameter | R = 10.0 mm | R = 12.5 mm | R = 15.0 mm | R > 15.0 mm |
|---|---|---|---|---|
Round: 6.5 mm, Square: 6.0 x 6.0 mm | 0.83 | 0.85 | 0.88 | 0.92 |
Round: 8.0 mm | 0.92 | 0.93 | 0.94 | 0.96 |
Round: 8.5 mm, Square: 8.0 x 8.0 mm | 0.94 | 0.95 | 0.95 | 0.96 |
