Find the Yuantong Model for Your Existing Guide

Type the model you have — for example HGH20CA, MGN12H, HGW25CC or HGR25. The page shows the block we supply for that size, with the dimensions and load ratings we publish, and a link to the product page and quotation form.

How the lookup works

The match is by size and block type, not by brand. A model with the HG-standard hole pattern and the same size maps to our block of that size; the C or H suffix on the miniature series means standard or extended block, and A/B/C on the HG series means how the block is bolted. If your model is not in the list, the answer is still the same size: choose the block by height and mounting pattern.

Where a size has more than one form — square, flange, low profile — the lookup shows the square version and links to the others. A replacement block has to match the rail, and the rail profile is fixed by the size, so the block type does not change the rail.

Before you order a replacement

Check three numbers against the drawing: the assembled height H, the block width W and the hole pattern. Accuracy and preload decide whether the block can be replaced on its own: up to P accuracy and ZA preload an interchangeable block fits an existing rail, while SP/UP and ZB are matched sets and need the rail and block ordered together. The preload page and the accuracy page explain where the split falls.

Series and sizes

Blocks: all series, from MGN7 to HGH45CA; rails: HGR / EGR. Full ranges on HG, miniature and RG.