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HIWIN MGN12H miniature linear guide block: 27 × 45.4 body, M3 20 × 20 holes and rail interface
What are the HIWIN MGN12H block dimensions and mounting-hole positions? · Modern device · basis: HIWIN Linear Guideway catalogue, MGN series tables for the MGN12 block and MGNR12R rail.
Also called: MGN12H, HIWIN MGN12H, MGN12H block, MGN12 carriage, MGN12H dimensions, MGN12 linear guide block, MGNR12R rail block
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 45.4 mm
- width
- 27.0 mm
- height
- 10.0 mm
Notes
- Datum: block centre; block underside at 0, top mounting face at 10.0. In assembly the underside is H1 3.0 above the rail bottom and the top face H 13.0 above it.
- Block width W 27.0, overall length L 45.4 including end caps and seals (steel body L1 32.4).
- Four M3 × 3.5 deep tapped holes in the top face on B × C = 20 × 20, centred on the block (modelled Ø2.5 tap drill).
- Underside rail channel 12.0 wide × 5.0 tall along the full length. Mating rail MGNR12R: width 12, height 8.0, M3 cap screws in Ø6.0 × 4.5 counterbores with Ø3.5 through holes at pitch 25.
- Not modelled: end-seal and end-cap profile, the Ø2 lube hole, ball grooves and retainer, and the rail.
- Dimensions are exact nominal (true size), no tolerance added.
HIWIN MGN12H miniature linear guide block: 27 × 45.4 body, M3 20 ×… size chart
| hole | x (mm) | y (mm) | thread |
|---|---|---|---|
| 1 | −10.0 | −10.0 | M3 × 3.5 |
| 2 | +10.0 | −10.0 | M3 × 3.5 |
| 3 | −10.0 | +10.0 | M3 × 3.5 |
| 4 | +10.0 | +10.0 | M3 × 3.5 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| top mounting holes | 4 × M3 on 20 × 20, 3.5 deep | carriage plate M3 screws (at most 3.5 mm engagement) | designed | all |
| rail channel | 12.0 wide, top face 13.0 above the rail bottom | MGNR12R rail | run | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| HIWIN (catalogue via DAMENCNC) | HIWIN MGN and MGW Product Catalog 2023 | web | Publisher's page; dimensions are facts |
| HIWIN (catalogue via Motion USA) | HIWIN MG Series 2025 | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| hiwin-mgn12h-linear-guide-block | HIWIN MGN12H miniature linear guide block: 27 × 45.4 body, M3 20 × 20 holes and rail interface | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=hiwin-mgn12h-linear-guide-block
Fits with
Questions
What is the MGN12H mounting-hole pattern?
Four M3 holes, 3.5 mm deep, on a 20 × 20 mm square centred on the block.
How tall is an MGN12H on its rail?
13.0 mm from the rail bottom to the block top (block underside 3.0 mm above the rail bottom).
How long is the MGN12H?
45.4 mm including end caps and seals; the steel body is 32.4 mm. Width 27.0 mm.