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MGN9H 300mm Linear Rail, Linear Guide with MGN9H Carriage Block, Stainless Steel Linear Bearing for CNC Machine

Free shipping on orders over $29.99

$17.59

$ 8 .99 $8.99

In Stock

1.Size:450mm


2.:Mgn9c


  • 【High Quality Material】The Linear rail is made of very hard stainless steel, which has the characteristics of strong rigidity, high precision, and rust resistance. It adopts four-point contact design, which can bear the load in all directions.
  • 【Easy to install】Standard MGN9 linear rail. Thickness is 6.5mm. With pre-drilled ⌀3.5mm mounting hole. The mount holes are metric. The spacing is 20mm. This linear rails are supposed to use M3*8mm bolts and T nuts.
  • 【Smooth and Quiet】All of them can easily pass the free fall test at 45° after lubrication. The rails are very smooth. The carriage moves smoothly and quiet, no binding, good quality, nice workmanship. Compared with other brands of rails, it has a longer s
  • 【Wide application】The linear guide are small size and light weight, especially suitable for miniaturized equipment, such as routers, 3D printers and plasma cutters etc.
  • 【Outstanding service】If there is a issues with the product you received, send us a message and we will help you out. If the product is damaged during use, we will replace it with a new one for you. Thanks.


Packing list:

MGN9 linear rail*1

MGN9C carriage block*1

The spacing of each hole is 20mm, the number of holes for different lengths of rails:

200mm (10 holes), 250mm (13 holes), 300mm (15 holes), 350mm (18 holes)

400mm (20 holes), 450mm (23 holes), 500mm (25 holes), 550mm (28 holes)

Difference between MGN9H block and MGN9C block:

MGN9H: Long Carriage Block, size 20mmx40x8mm

MGN9C: Short Carriage Block, size 20mmx29x8mm

Please select the correct size and type you need.

Installation and usage advice:

1. Please lubricate the rail and slider again before installation.

2. When installing the rail, do not remove the block unless necessary.

3. When installing the rail, do not switch the block of the rail arbitrarily, so as not to affect the accuracy.

4. Lubricate regularly to reduce friction of rolling parts, prevent burns and reduce wear, and prolong service life.


Gerald Giarmo
Reviewed in the United States on December 20, 2023
Carriage ran very smoothly along the rail, but the rail was warped. Unfortunately the bar I mounted it couldn't make up for that and warped when the rail was bolted down to it.
Phil Timpson
Reviewed in the United States on November 6, 2022
installed on my 3d printer. They're a little gritty from the crap they use at the factory, so flush them with some IPA before you lube and install them.
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