HIWIN HG linear guideway: HGR15 to HGR35 rail (width, height, hole pitch, counterbore) and HGH15CA to HGH35CA / HGW15CC to HGW35CC block dimensions — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35/ (sheet CC BY 4.0) Basis: HIWIN's own HG catalog tables, read in three independent copies (HG Series catalog, catalogue GW-10-1-EN-1701-K, a DE catalogue); the one disagreement (rail bolt length by edition) is shown Catalog version: 2026-10-20 Sizes: see table below - HIWIN HG is the heavy-load square-block profile rail family (HGR rail, HGH square block, HGW flange block); sizes 15, 20, 25, 30 and 35 are the rail size. Dimension letters follow HIWIN's catalog: W / WR block and rail width; H / HR block and rail height (H from the rail bottom to the block top); H1 clearance under the block; N distance from the rail side to the block side; B x C the four block holes (B across the rail, C along it); L1 body length, L length with end caps; K1 / K2 grease nipple and end-cap details; G grease nipple; M x l thread and depth; T block hole depth; rail D x h x d the counterbore diameter, depth and through hole; P hole pitch; E end distance from the rail end to the first hole. - Numbers: every HGH CA, HGR_R and the HGW 15 / 30 / 35 value is printed identically in three HIWIN catalog documents (the HG catalog hosted by Letromec, catalogue GW-10-1-EN-1701-K hosted by Ignera, and a HIWIN DE catalogue hosted by Unitech). HGW20CC and HGW25CC are complete in the Letromec catalog only; the other two documents print their C, L1, L, K1 and (as shared with the SC rows) the other columns consistently. Rail bolt length differs by edition: M4 x 16, M5 x 16, M6 x 20, M8 x 25, M8 x 25 (Letromec, Ignera) against M4 x 20, M5 x 20, M6 x 25, M8 x 30, M8 x 35 (Unitech); both are shown. HGH30CA and HGW30CC length L is 97.4 mm for the standard block and 98.8 mm for the steel-deflector /SE version. The HGR_T (tapped from below) rows: S, h, P, E and weight are from the Letromec catalog only. - End distance: E = 20 mm is the standard end distance for all sizes; the Ignera catalog lists the allowed E1 / E2 range as 6 to 54 (15), 7 to 53 (20), 8 to 52 (25) and 9 to 71 (30 and 35), with E no greater than half the pitch for cut rails. Pitch P is 60 mm for sizes 15 to 25 and 80 mm for 30 and 35. Maximum single rail length 4000 mm. - Numbers only, no CAD files: the catalog prints the rail and block envelope and the hole pattern, but not the rail groove or block cross-section, so a box-with-holes would not be the part. For the real STEP of the rail and block use HIWIN's own CAD configurator (linked under sources). Dimensions are nominal catalog values; accuracy class (N, H, P, SP, UP) and preload change tolerances, not these nominal sizes. - Left out: HGH / HGW SA, HA, HB, HC, SC types and the HGL / HGW-CB variants (not read), HG 45 and 55, load ratings, moment capacity and weights of blocks, the QH / QW series. part width W / WR, mm height H / HR, mm length L (block), mm block holes B x C, mm / rail pitch P, mm thread / bolt rail counterbore D x h, through d, mm / other rail end distance E, mm / block other dimensions HGR15R rail (bolted from above) 15 15 rail length: any, max 4000 (3900 with E1 = E2) P 60 rail bolt M4 x 16 (catalog edition A) / M4 x 20 (edition C) D 7.5 x h 5.3, d 4.5 E 20 standard; allowed 6 to 54; 1.45 kg/m HGR20R rail (bolted from above) 20 17.5 rail length: any, max 4000 (3900 with E1 = E2) P 60 rail bolt M5 x 16 / M5 x 20 D 9.5 x h 8.5, d 6 E 20 standard; allowed 7 to 53; 2.21 kg/m HGR25R rail (bolted from above) 23 22 rail length: any, max 4000 (3900 with E1 = E2) P 60 rail bolt M6 x 20 / M6 x 25 D 11 x h 9, d 7 E 20 standard; allowed 8 to 52; 3.21 kg/m HGR30R rail (bolted from above) 28 26 rail length: any, max 4000 (3900 with E1 = E2) P 80 rail bolt M8 x 25 / M8 x 30 D 14 x h 12, d 9 E 20 standard; allowed 9 to 71; 4.47 kg/m HGR35R rail (bolted from above) 34 29 rail length: any, max 4000 (3900 with E1 = E2) P 80 rail bolt M8 x 25 / M8 x 35 D 14 x h 12, d 9 E 20 standard; allowed 9 to 71; 6.3 kg/m HGR15T rail (bolted from below) 15 15 rail length: any P 60 tapped M5 x 0.8 thread depth h 8 E 20; 1.48 kg/m HGR20T rail (bolted from below) 20 17.5 rail length: any P 60 tapped M6 x 1 thread depth h 10 E 20; 2.29 kg/m HGR25T rail (bolted from below) 23 22 rail length: any P 60 tapped M6 x 1 thread depth h 12 E 20; 3.35 kg/m HGR30T rail (bolted from below) 28 26 rail length: any P 80 tapped M8 x 1.25 thread depth h 15 E 20; 4.67 kg/m HGR35T rail (bolted from below) 34 29 rail length: any P 80 tapped M8 x 1.25 thread depth h 17 E 20; 6.51 kg/m HGH15CA block (square, high) 34 28 61.4 B 26 x C 26 M4 x 5 (blind, depth l) T 6 H1 4.3, N 9.5, B1 4, L1 39.4, K1 10, K2 4.85, G 5.3, H2 7.95, H3 7.7 HGH20CA block (square, high) 44 30 77.5 B 32 x C 36 M5 x 6 (blind, depth l) T 8 H1 4.6, N 12, B1 6, L1 50.5, K1 12.25, K2 6, G 12, H2 6, H3 6 HGH25CA block (square, high) 48 40 84 B 35 x C 35 M6 x 8 (blind, depth l) T 8 H1 5.5, N 12.5, B1 6.5, L1 58, K1 15.7, K2 6, G 12, H2 10, H3 9 HGH30CA block (square, high) 60 45 97.4 B 40 x C 40 M8 x 10 (blind, depth l) T 8.5 H1 6, N 16, B1 10, L1 70, K1 20.25, K2 6, G 12, H2 9.5, H3 13.8 HGH35CA block (square, high) 70 55 112.4 B 50 x C 50 M8 x 12 (blind, depth l) T 10.2 H1 7.5, N 18, B1 10, L1 80, K1 20.6, K2 7, G 12, H2 16, H3 19.6 HGW15CC block (flange) 47 24 61.4 B 38 x C 30 M5 through the flange T 6, T1 8.9, T2 6.95 H1 4.3, N 16, B1 4.5, L1 39.4, K1 8, K2 4.85, G 5.3, H2 3.95, H3 3.7 HGW20CC block (flange) 63 30 77.5 B 53 x C 40 M6 through the flange T 8, T1 10, T2 9.5 H1 4.6, N 21.5, B1 5, L1 50.5, K1 10.25, K2 6, G 12, H2 6, H3 6 HGW25CC block (flange) 70 36 84 B 57 x C 45 M8 through the flange T 8, T1 14, T2 10 H1 5.5, N 23.5, B1 6.5, L1 58, K1 10.7, K2 6, G 12, H2 6, H3 5 HGW30CC block (flange) 90 42 97.4 B 72 x C 52 M10 through the flange T 8.5, T1 16, T2 10 H1 6, N 31, B1 9, L1 70, K1 14.25, K2 6, G 12, H2 6.5, H3 10.8 HGW35CC block (flange) 100 48 112.4 B 82 x C 62 M10 through the flange T 10.1, T1 18, T2 13 H1 7.5, N 33, B1 9, L1 80, K1 14.6, K2 7, G 12, H2 9, H3 12.6 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - HIWIN (HG Series catalog, hosted by Letromec): HG series linear guideway: HGH15CA to HGH35CA, HGW15CC to HGW35CC and HGR rail tables (WR, HR, D, h, d, P, E, bolt) — web — Publisher's page; dimensions are facts — https://asiapacific.my/preview/letromec/pdf/1022018105917AMHG-Series-Catalog.pdf - HIWIN (catalogue GW-10-1-EN-1701-K, hosted by Ignera): Linear guideways: HGH (Table 3.6), HGW (3.8), HGR_R (3.9) dimensions — web — Publisher's page; dimensions are facts — https://www.ignera.lt/image/catalog/product/linear_guideways.pdf - HIWIN (catalogue, hosted by Unitech): Linear guideways (DE catalogue): HGH CA, HGW CC and HGR_R dimensions — web — Publisher's page; dimensions are facts — https://unitech.com.ua/image/catalogs/hiwin/catalog_hiwin-linear-de.pdf - HIWIN: HG series rail CAD (HIWIN's own CAD configurator, STEP download; check HIWIN's terms) — STEP, web — HIWIN site terms [verify license at link] — https://motioncontrolsystems.hiwin.com/en-us/configurator/hg-series---rail - HIWIN: HG series block / assembly CAD (HIWIN's own CAD configurator, STEP download; check HIWIN's terms) — STEP, web — HIWIN site terms [verify license at link] — https://motioncontrolsystems.hiwin.com/en-us/configurator/hg-series-assembly 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-hg-linear-guideway-hgr-hgh-hgw-15-35