A new device for measuring run out error of needle valve seat′s cone surface is proposed. The calculating and estimating methods of the error are also described in the paper.
推出了一种新的针阀体座面圆跳动误差测量装置，介绍了误差的计算与评定方法。
Adopting are type run-out of tool during pressing the window shape of thin thickness type M needle roller cage, the product quality can be improved & the bearing life can be extended .
冲压薄壁M形滚针保持架窗孔形状采用圆弧形空刀槽，可以提高产品质量，延长轴承使用寿命。
The piston rod self-locking type gas spring end there is a needle valve open the needle valve is self-locking type gas spring can run as the free type gas spring;
自锁型气弹簧是一种可以在行程任一位置锁定的气弹簧。 在自锁型气弹簧的活塞杆端部有一个针阀打开这个针阀，则自锁型气弹簧可以象自由型气弹簧那样运行；
The operational clearance for needle roller bearing assemblies, without inner rings, which run directly onto the shaft is determined by the tolerance field selected for an "actual" raceway.
作战间隙，无内圈滚针轴承组件，它运行到轴上直接决定选定一个“实际”的滚道的公差范围。
The operational clearance for needle roller bearing assemblies, without inner rings, which run directly onto the shaft is determined by the tolerance field selected for an "actual" raceway.
作战间隙，无内圈滚针轴承组件，它运行到轴上直接决定选定一个“实际”的滚道的公差范围。
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