| 31. | The wall thickness is maintained by controlling the gap between the roller and the mandrel.
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| 32. | The mandrel does not move forward and there is no collapsable mandrel in the process.
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| 33. | The mandrel does not move forward and there is no collapsable mandrel in the process.
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| 34. | For hard materials or high volume use, the mandrel is usually made of metal.
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| 35. | Furthermore, because of the mandrel they are more prone to failure from corrosion and vibration.
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| 36. | One way is to use a hollow billet and then use a fixed or floating mandrel.
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| 37. | Mandrel is extracted, leaving a final geometric shape but can be left in some cases.
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| 38. | Writer Bob Baker on the recent DVD release also expressed his disappointment with the Mandrel design.
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| 39. | It is also less commonly used for non-sparking tools and mandrels for metal spinning.
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| 40. | For some tube bending processing, a mandrel is placed inside the tube to prevent collapsing.
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