{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35",
 "name": "HIWIN HG linear guideway: HGR15 to HGR35 rail (width, height, hole pitch, counterbore) and HGH15CA to HGH35CA / HGW15CC to HGW35CC block dimensions",
 "kind": "standard",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "What are the dimensions of HIWIN HGR15, HGR20, HGR25, HGR30 and HGR35 rails and HGH CA / HGW CC blocks: rail width and height, hole pitch, counterbore, block size and mounting holes?",
 "tags": [
  "hiwin",
  "linear guide",
  "profile rail",
  "linear guideway",
  "hgr15",
  "hgh15ca",
  "hgw",
  "rail",
  "carriage",
  "block",
  "standard"
 ],
 "aliases": [
  "hgr15 dimensions",
  "hgr20 rail dimensions",
  "hgr25 hole pitch 60",
  "hgr30 rail",
  "hgr35",
  "hgh15ca dimensions",
  "hgh20ca dimensions",
  "hgh25ca mounting holes",
  "hgh30ca",
  "hgh35ca",
  "hgw15cc dimensions",
  "hgw20cc flange block",
  "hiwin hg rail width",
  "hiwin 15 mm linear rail dimensions",
  "hiwin rail counterbore",
  "hgr15 bolt m4",
  "profile rail 15 size chart",
  "hiwin hgh15ca bolt pattern",
  "linear guide 20mm rail dimensions",
  "hiwin hg step file"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35/",
 "sheet_txt": "https://xemstudio.com/objects/hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35/sheet.txt",
 "sheet": {
  "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",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "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."
  ],
  "table": {
   "columns": [
    "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"
   ],
   "rows": [
    [
     "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"
    ]
   ]
  }
 },
 "sheet_text": "HIWIN HG linear guideway: HGR15 to HGR35 rail (width, height, hole pitch, counterbore) and HGH15CA to HGH35CA / HGW15CC to HGW35CC block dimensions — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35/  (sheet CC BY 4.0)\nBasis: 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\nCatalog version: 2026-10-20\n\nSizes: see table below\n- 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.\n- 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.\n- 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.\n- 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.\n- 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.\n\npart  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\nHGR15R 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\nHGR20R 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\nHGR25R 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\nHGR30R 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\nHGR35R 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\nHGR15T 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\nHGR20T 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\nHGR25T 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\nHGR30T 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\nHGR35T 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\nHGH15CA 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\nHGH20CA 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\nHGH25CA 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\nHGH30CA 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\nHGH35CA 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\nHGW15CC 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\nHGW20CC 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\nHGW25CC 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\nHGW30CC 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\nHGW35CC 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\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- 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\n- 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\n- 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\n- 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\n- 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\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35\n",
 "sources": [
  {
   "publisher": "HIWIN (HG Series catalog, hosted by Letromec)",
   "title": "HG series linear guideway: HGH15CA to HGH35CA, HGW15CC to HGW35CC and HGR rail tables (WR, HR, D, h, d, P, E, bolt)",
   "url": "https://asiapacific.my/preview/letromec/pdf/1022018105917AMHG-Series-Catalog.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "HIWIN (catalogue GW-10-1-EN-1701-K, hosted by Ignera)",
   "title": "Linear guideways: HGH (Table 3.6), HGW (3.8), HGR_R (3.9) dimensions",
   "url": "https://www.ignera.lt/image/catalog/product/linear_guideways.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "HIWIN (catalogue, hosted by Unitech)",
   "title": "Linear guideways (DE catalogue): HGH CA, HGW CC and HGR_R dimensions",
   "url": "https://unitech.com.ua/image/catalogs/hiwin/catalog_hiwin-linear-de.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "HIWIN",
   "title": "HG series rail CAD (HIWIN's own CAD configurator, STEP download; check HIWIN's terms)",
   "url": "https://motioncontrolsystems.hiwin.com/en-us/configurator/hg-series---rail",
   "formats": [
    "STEP",
    "web"
   ],
   "license": "HIWIN site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "HIWIN",
   "title": "HG series block / assembly CAD (HIWIN's own CAD configurator, STEP download; check HIWIN's terms)",
   "url": "https://motioncontrolsystems.hiwin.com/en-us/configurator/hg-series-assembly",
   "formats": [
    "STEP",
    "web"
   ],
   "license": "HIWIN site terms",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "mgn-rails",
  "ball-screw-end-supports-bk-bf-fk-ff",
  "linear-ball-bushings-lm-uu-luu",
  "flanged-linear-bushings-lmf-lmk-lmh",
  "linear-shafts-h6",
  "socket-head-cap-screws-metric"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "rail width x height",
   "exact": "HGR15 15 x 15, HGR20 20 x 17.5, HGR25 23 x 22, HGR30 28 x 26, HGR35 34 x 29 mm",
   "mates": "HGH / HGW block of the same size: the block runs on this rail (clearance is built into the block)",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "rail counterbore and hole",
   "exact": "D 7.5 x 5.3 / 9.5 x 8.5 / 11 x 9 / 14 x 12 / 14 x 12, through Ø4.5 / 6 / 7 / 9 / 9 mm",
   "mates": "socket head cap screw M4 x 16, M5 x 16, M6 x 20, M8 x 25, M8 x 25 (head sits in the counterbore); screws on socket-head-cap-screws-metric",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "rail hole pitch and end distance",
   "exact": "P 60 / 60 / 60 / 80 / 80 mm, E 20 mm standard",
   "mates": "mounting surface drilled and tapped on the same pitch (cut rails: E at most P / 2)",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "block holes",
   "exact": "B x C = 26x26 / 32x36 / 35x35 / 40x40 / 50x50 mm for HGH15 / 20 / 25 / 30 / 35 CA (M4 / M5 / M6 / M8 / M8)",
   "mates": "carriage plate drilled on the same B x C with clearance for the M screws, plate seated on the block top",
   "fit": "designed",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "How wide is an HGR15 rail and how far apart are its holes?",
   "a": "15 mm wide, 15 mm high, holes every 60 mm (P) with the first at 20 mm from the end (E), counterbore 7.5 x 5.3 deep, through hole 4.5, for M4 bolts."
  },
  {
   "q": "What are the mounting holes of an HGH15CA block?",
   "a": "Four M4 x 5 holes, 26 mm across (B) by 26 mm along (C); block width 34, height 28 (rail bottom to block top), length 61.4."
  },
  {
   "q": "What is the hole pitch of HGR30 and HGR35?",
   "a": "80 mm, first hole at 20 mm; sizes 15, 20 and 25 are on 60 mm."
  },
  {
   "q": "What is the difference between HGH and HGW?",
   "a": "HGH is the narrow square block with four tapped holes in the top; HGW is the wide flange block (47 mm for size 15) with holes through the flange and a lower height (24 mm for size 15)."
  },
  {
   "q": "Can I download a STEP file?",
   "a": "Not here: the catalog prints envelopes only; HIWIN's CAD configurator (linked) gives the real rail and block."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/hiwin-hg-linear-guideway-hgr-hgh-hgw-15-35/index.md"
}