| 摘要 |
The invention relates to improvements in spin lathes and particularly to a spin lathe adapted to forge a metal cylindrical tube into a closed vessel for gases and liquids under pressure. The element(20) includes a stationary substantially cylindrical body(42) having an axial bore(43) therethrough in which is rotatably mounted core (44). An oil tube (53) is press fitted into bore (45) and is held against possible displacement axially by a split retaining ring(54). The oil tube has a reduced external diameter for a greater part of its length to provide an annular oil flow passage (55) between it and bore. The other oil flow inlet line is in flow communication with an internal circumferential channel (62).
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