BEND TOOLING INC.: Rotary-Draw Tube-Bending Tools ~ Die Sets ~ Mandrels ~ Wipers ~ Mandrel-Bending Tools
MANDREL & WIPER CHARTS
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Bending Formulas | Conversion Formulas | Geometric Formulas
| MANDREL CHART | |||||||||
| "D" OF BEND (CLR/TOD) | |||||||||
| 1 | 1.25 | 1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
|
WALL FACTOR (TOD/WT) |
10 | P | P | P | P | P | P | N/A | N/A |
| 12 | 1 | 1 | P | P | P | P | N/A | N/A | |
| 15 | 2 | 1 | 1 | 1 | P | P | P | N/A | |
| 20 | 2 | 2 | 2 | 1 | 1 | 1 | P | P | |
| 25 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | P | |
| 30 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | |
| 40 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | |
| 50 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | |
| 60 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 2 | |
| 70 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | |
| 80 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | |
| 100 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | |
| 125 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | |
| Notes: | |||||||||
| [1] N/A = Mandrel not recommended. | |||||||||
| [2] P = Plug mandrel recommended. | |||||||||
| [3] 1, 2, or 3 = 1-, 2-, or 3-ball regular-pitch mandrel recommended. | |||||||||
| [4] 4 or 5 = 4- or 5-ball close-pitch mandrel recommended. | |||||||||
| [5] Recommendations assume 180-degree bend. | |||||||||
| [6] Applications with wall factors in excess of 70 may require additional | |||||||||
| balls or double-close pitch depending upon tubing material and machine. | |||||||||
| WIPER CHART | |||||||||
| "D" OF BEND (CLR/TOD) | |||||||||
| 1 | 1.25 | 1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
|
WALL FACTOR (TOD/WT) |
10 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| 12 | W | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| 15 | W | W | N/A | N/A | N/A | N/A | N/A | N/A | |
| 20 | W | W | W | N/A | N/A | N/A | N/A | N/A | |
| 25 | W | W | W | W | W | N/A | N/A | N/A | |
| 30 | W | W | W | W | W | W | N/A | N/A | |
| 40 | W | W | W | W | W | W | W | N/A | |
| 50 | H | W | W | W | W | W | W | W | |
| 60 | H | H | W | W | W | W | W | W | |
| 70 | H | H | H | W | W | W | W | W | |
| 80 | H | H | H | H | W | W | W | W | |
| 100 | H | H | H | H | H | H | W | W | |
| 125 | H | H | H | H | H | H | H | H | |
| Notes: | |||||||||
| [1] N/A = Wiper not recommended. | |||||||||
| [2] W = Standard wiper recommended. | |||||||||
| [3] H = High-pressure wiper recommended. | |||||||||
| [4] Recommendations assume 180-degree bend. | |||||||||
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