| 摘要 |
A boring stand for supporting engine blocks or cylinders which are to be bored that has a moveable platform which is slidably mounted on a vertical upright of a stand and has polyethylene wear plates engageable with a vertical upright. The moveable platform has a cable with one end which connects to an upper portion of the stand and a lower portion which passes around a reel within the platform structure which can be driven by a worm wheel and worm and which has a crank handle attached to the worm. The worm and worm wheel assures that the platform will stay in a preset position after adjustment and allows the platform to be positioned to any desired height.
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