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Hiwin LG Linear Guideways

Understanding Part Numbers

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Here is a typical part number for an LG bearing block:

LGH 35 CAE Z0 H E1

And here's how to break down the individual sections:

  • LG: this is the major designation for the HIWIN heavy duty linear block line

  • H: this indicates a "square" type bearing block. Another possibility for this location is "W" and that would mean a flange-type bearing block.

  • 35: This is the size of the block. It really refers to the width of the rail on which the blocks slides. The LG line includes several sizes ranging from 15mm - 65mm.

  • C: Load type. "C" means heavy load. "H" means super-heavy load.

  • A: Block mounting type. "A" means that items attach to the block from ABOVE via threaded holes in the block. "B" means that there is a thru-hole and a bolts go through the block from the bottom. "C" means versatile mounting from either the top or the bottom.

  • E: Block special option. In most cases, this designation will not be present. When it is, it signals that the block has some special feature not normally present on a standard block. For instance, in this case, it's sending up a signal flare that there is a special feature in the form of the final characters in the part number chain: E1. Its meaning is explained below.

  • Z0: Bearing "preload." This describes how snugly the bearing fits to the rail or the amount of "drag" it has. Automation Overstock only carries the two most common preloads: Z0 and Z1. Z0 means VERY LIGHT preload. Z1 means LIGHT preload. For all intents & purposes, there's very little difference between these two designations. Click here for more info.

  • H: Precision code/accuracy standards. The most common designation you'll find is "H" which means High tolerence. We have a few blocks in the next classification up with the "P" designation which stands for Precision.

  • E1: This is a very nice feature found on many of the blocks we acquired in our buyout. It means the block has a reservoir and is self-lubricating. But these blocks can also use the traditional grease fitting, as well.


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