Description
Using the Leybold part ensures the diameter and length are perfect for your D16E pump. This simple step protects your hard work and your pump’s performance.
It is a cylinder of hardened metal that fits into matching holes in two parts. When you insert the dowel pin, it locks those parts into exact alignment. It ensures everything is in the right position before you tighten the screws.
In a machine like a vacuum pump, this alignment is critical. The rotor, vanes, and other internal parts need to be perfectly positioned. Even a small misalignment can cause rubbing, wear, poor performance, or damage.

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