MGN12H Linear Slide Rail with Block, 400 mm
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Prices updated: 13 Oct 2026
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About this product
Linear slide rail with an MGN12H carriage (slide block) for guiding motion along one axis, listed at 400 mm in the title. It is intended for DIY 3D printer frames such as Kossel, mini delta and parallel designs, and for DIY CNC machines. The product description cites 450 mm, so confirm the length before designing your frame.
Specifications
- Series
- MGN12H
- Rail width
- 12 mm
- Rail length (per title)
- 400 mm
- Carriage type
- Long block (H)
- Typical use
- 3D printers and DIY CNC
Frequently asked questions
Is the rail 400 mm or 450 mm long?
The title says 400 mm while the description mentions 450 mm. Confirm the exact length with the seller's specification before you design or cut your frame.
How is an MGN12 rail usually mounted?
MGN12 rails are commonly fixed with M3 screws through the rail holes. Check the hole spacing against your frame design before mounting.
