HIWIN MGN miniature linear guideway: MGNR5, 7, 9, 12, 15 rails and MGN7, 9, 12, 15 C / H blocks (width, height, hole pitch, counterbore, mounting holes) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/hiwin-mgn-miniature-guideway-mgn5-mgn15/ (sheet CC BY 4.0) Basis: HIWIN MG Series 2025 and MGN / MGW 2023 catalogs, read independently; the only difference (rail screw length) is shown Catalog version: 2026-10-20 Sizes: see table below - HIWIN MGN is the miniature profile-rail family: MGNR rail with an MGNC (standard, short) or MGNH (long) block; MGN5 rails and small blocks are for micro mechanisms, MGN9, 12 and 15 are the 3D-printer / CNC sizes. Letters as in HIWIN's catalog: W / WR width, H / HR height (H from the rail bottom to the block top), B x C the four block holes (B across, C along), L1 body length, L overall length, N distance from the rail side to the block side, H1 clearance under the block, D x h x d the rail counterbore, P the hole pitch, E the end distance. - Numbers: two HIWIN catalogs, read independently, agree on all of this: the MG Series 2025 catalog (Motion Industries copy) and the MGN and MGW product catalog 2023 (Damen CNC copy). They differ only in the rail mounting screw: M2 x 6 / M2 x 6 (MGN5, special screw), M2 x 6 / M2 x 8 (MGN7), M3 x 8 / M3 x 10 (MGN9, 12), M3 x 10 / M3 x 12 (MGN15): the first is the MG Series 2025 value, the second the 2023 catalog. Both are shown. The 2023 catalog also prints the allowed end distance range E1/2 (4 to 11 on MGNR5 up to 6 to 34 on MGNR15) and the maximum rail length; the 2025 catalog prints E as a single standard value (5 / 5 / 7.5 / 10 / 15). - What is new on this site: MGN5 and MGN7 rails and the MGN7 blocks, the block's H1, N and B1, the rail end-distance range and screw lengths. The existing mgn-linear-rails page holds the MGN9 / 12 / 15 rail and block envelopes as files; its rail and block values match this table (rail 9 x 6.5, 12 x 8, 15 x 10 with the same hole pitches; MGN9C L 28.9 and 9H 39.9, 12C 34.7 and 12H 45.4, 15H 58.8). MGN5 blocks (MGN5C-O / 5H-O outer-recirculation) are not shown: the MG 2025 text reads only partly (H 6, W 12, B 8, L 16 for the C-O block). - Numbers only for the new sizes, no CAD files: the catalog prints the envelope and the hole pattern, not the rail groove or the block section. Use HIWIN's CAD data for the real shape (linked under sources). The wide MGW series is not covered. - Left out: MGN5 blocks, MGW (wide) rails and blocks, accuracy classes, load ratings, weights of blocks. part width W / WR, mm height H / HR, mm length L (block), mm block holes B x C, mm / rail pitch P, mm thread / rail bolt (two catalogs) rail counterbore D x h, through d, mm rail end distance E (standard), allowed range / block other dimensions MGNR5R rail 5 3.6 max 250 per piece P 15 M2 x 6 / M2 x 6 (special screw) D 3.6 x h 0.8, d 2.4 E 5; E1/2 4 to 11; 0.15 kg/m MGNR7R rail 7 4.8 max 600 per piece P 15 M2 x 6 / M2 x 8 D 4.2 x h 2.3, d 2.4 E 5; E1/2 5 to 12; 0.22 kg/m MGNR9R rail 9 6.5 max 1200 per piece P 20 M3 x 8 / M3 x 10 D 6 x h 3.5, d 3.5 E 7.5; E1/2 5 to 15; 0.38 kg/m MGNR12R rail 12 8 max 2000 per piece P 25 M3 x 8 / M3 x 10 D 6 x h 4.5, d 3.5 E 10; E1/2 5 to 20; 0.65 kg/m MGNR15R rail 15 10 max 2000 per piece P 40 M3 x 10 / M3 x 12 D 6 x h 4.5, d 3.5 E 15; E1/2 6 to 34; 1.06 kg/m MGN7C block, standard 17 8 22.5 B 12 x C 8 M2 x 2.5 (blind) — H1 1.5, N 5, B1 2.5, L1 13.5, grease hole Ø1.2, H2 1.5 MGN7H block, long 17 8 30.8 B 12 x C 13 M2 x 2.5 (blind) — H1 1.5, N 5, B1 2.5, L1 21.8, grease hole Ø1.2, H2 1.5 MGN9C block, standard 20 10 28.9 B 15 x C 10 M3 x 3 (blind) — H1 2, N 5.5, B1 2.5, L1 18.9, grease hole Ø1.4, H2 1.8 MGN9H block, long 20 10 39.9 B 15 x C 16 M3 x 3 (blind) — H1 2, N 5.5, B1 2.5, L1 29.9, grease hole Ø1.4, H2 1.8 MGN12C block, standard 27 13 34.7 B 20 x C 15 M3 x 3.5 (blind) — H1 3, N 7.5, B1 3.5, L1 21.7, grease hole Ø2, H2 2.5 MGN12H block, long 27 13 45.4 B 20 x C 20 M3 x 3.5 (blind) — H1 3, N 7.5, B1 3.5, L1 32.4, grease hole Ø2, H2 2.5 MGN15C block, standard 32 16 42.1 B 25 x C 20 M3 x 4 (blind) — H1 4, N 8.5, B1 3.5, L1 26.7, grease hole M3 (G 4.5), H2 3 MGN15H block, long 32 16 58.8 B 25 x C 25 M3 x 4 (blind) — H1 4, N 8.5, B1 3.5, L1 43.4, grease hole M3 (G 4.5), H2 3 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - HIWIN (MG Series 2025, hosted by Motion Industries): MG series miniature guideway: MGN C / H block table, MGNR rail table (MGN5, 7, 9, 12, 15) — web — Publisher's page; dimensions are facts — https://s3.amazonaws.com/www.motionusa.com/hiwin/2025/MG Series-2025.pdf - HIWIN (MGN and MGW product catalog 2023, hosted by Damen CNC): Table 3.79 block dimensions (MGN07 to MGN15) and Table 3.81 rail dimensions (MGNR05 to MGNR15, min / max end distance, assembly screw) — web — Publisher's page; dimensions are facts — https://damencnc.com/userdata/file/3455-3_HIWIN_MGN_and_MGW_Product_Catalog_2023.pdf - HIWIN: MGN / MGW miniature guideway product page (HIWIN CAD data is offered from the maker's site; check HIWIN's terms) — STEP, PDF — HIWIN site terms [verify license at link] — https://www.hiwin.com/en/products/linear-guideways/mgn-mgw-series No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=hiwin-mgn-miniature-guideway-mgn5-mgn15