2Pcs Linear Motion Rod Shaft Slide Guide D 12mm x L 15.75 inch / 400mm + 4Pcs Block Bearings SCS12UU + 4Pcs Aluminum Rail Support SK12 Linear Motion Set Kit for 3D Printer, DIY, CNC

So, there are no adjustments on these bearings, but the actual fit straight out of the packing is certainly good enough for this particular application. I'm not sure I'd use these for an ultra high precision application due to the lack of adjustability but I can't honestly say anything negative about these, as the price was so low, I'm actually surprised they're of decent quality. The mounted up easily and the slide showed little resistance and to this, I'm really pleased. I would purchase these again for use in basic operations as I believe they'll last a long time and provide good service for the next few years. Perhaps drilling and tapping a zerk fitting would prove worthwhile. These are a good value and a worthwhile product to have in your shop.

Using to make a router table.

From a product quality perspective, this all looks solid. The guide rods are straight, carriages roll smoothly, etc. However, the first time I ordered this product, it arrived with 2 guide rods, 2 carriages and 2 support mounts - missing half the carriages and supports. Not sure what I'm expected to do with only enough parts to use one guide rod. So I put in for a replacement, which, AGAIN, showed up with only 2 carriages and 2 supports. Two stars for the quality of the rails, but if you're looking for a complete set for a project, I suggest buying a different brand, or from a different vendor.

Received the product with only 1 of 2 sets of Shaft Support Guides, had to order another set online. Edit 6/25/2024 Increasing from 2 to 3 stars, seller reached out and offered to ship the missing parts. Appreciate the customer service, hopefully the packaging will improve going forward

Just what I needed

Justo lo que nesecitaba

This product was perfect for my project.

Becareful with sk12 included, it’s useless. Sk12 dont have the correct dimensions, it’s necessary to buy another set to replace the sk12 included

A tiempo ,Producto en buen estado. como lo esperaba.

Strong, quality is good

Se ve de muy buena calidad

Great quality, very smooth.

Product is as described but be aware you may be charged Duty, taxes and brokerage fees not noted here. Update - The vendor supplied a partial refund amounting to the duties paid. Very professional!