MGN9C / MGN9H Miniature Linear Guide — Standard & Extended Length Blocks
The MGN9 is a 9 mm miniature guide widely used on 3D printers, laser engravers and small automation slides. The MGN9C standard block and MGN9H extended block use the same MGN R9 rail; the H version adds length and moment capacity without changing the mounting height.
Specifications
| Model | MGN9C / MGN9H |
| Size | 9 mm |
| Block type | Miniature, standard (C) / extended (H) |
| Mounting | Top tapped |
| Accuracy grade | C / H / P |
| Preload | ZF / Z0 / Z1 |
| Matching rail | MGN R9 |
| Dynamic load C (kgf, C / H) | 190 / 260 |
| Static load C0 (kgf, C / H) | 260 / 410 |
| Block height H (mm) | 10 |
| Block width W (mm) | 20 |
| Block length L (mm) | 28.9 (C) / 39.9 (H) |
Complete dimension table (mm) — MGN9C / MGN9H
| H | 10 |
| H1 | 2 |
| N | 5.5 |
| W | 20 |
| B | 15 |
| B1 | 2.5 |
| C block length | 10 |
| L1 | 18.9 (C) / 29.9 (H) |
| L | 28.9 (C) / 39.9 (H) |
| G | — |
| Gn | Ø1.2 |
| M | M3x3 |
| H2 | 1.8 |
| Wr | 9 |
| Hr | 6.5 |
| D | 6 |
| h | 3.5 |
| d | 3.5 |
| P | 20 |
| E | 7.5 |
| Rail bolt | M3x8 |
| Dynamic C | 190 / 260 kgf (1.86 / 2.55 kN) |
| Static C0 | 260 / 410 kgf (2.55 / 4.02 kN) |
| MR | 1.2 / 2.0 kN-m |
| MP | 0.75 / 1.9 kN-m |
| MY | 0.75 / 1.9 kN-m |
| Block weight | 16 / 26 g |
| Rail weight | 0.38 kg/m |
Transcribed from the current product catalogue. 2D drawing and STEP model on request.
Options
- Block length: standard (C) or extended (H)
- Dust protection on request
- Stainless steel version on request
- Special rail lengths on request
Where this block is used
Miniature blocks are used where moving mass has to stay small: 3D printer gantries, laser heads, dispensing axes and small pick-and-place slides. The C and H blocks share one rail, so an axis can be rebuilt with more moment capacity without changing the rail or the hole pattern.
Mounting: rails and blocks are bolted to machined faces. Rail bolts are tightened from the centre outwards in the sequence given in the catalogue, and running accuracy is checked with a dial gauge before the carriage is loaded. Lubrication is by grease nipple or oil port; the re-greasing interval follows load and duty cycle, so it is agreed with the customer rather than fixed on the datasheet.
Matching rail
MGN R9 rail is cut to order from 100 mm. See rail options.
Downloads
STEP (AP214) model and 2D drawing for this size are available on request — ask us and we will email them.
FAQ
| What is the difference between MGN9C and MGN9H? | C is the standard block, H is the extended block. The H block is longer and carries a higher moment load; both use the same MGN R9 rail. |
| Does MGN9H mean heavy load? | No. On the MGN series the H suffix means extended length, not heavy load. |
| Which accuracy and preload are available? | Accuracy C / H / P and preload ZF / Z0 / Z1. SP and UP are not offered on MGN. |
| Are the load ratings in kgf or kN? | The catalogue prints this series in kgf (1 kgf = 9.81 N). For MGN15C that is 470 kgf ≈ 4.6 kN. Ask for the signed datasheet if you need the value confirmed in kN. |