{
 "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": "oring-gland-dynamic-reciprocating-as568",
 "name": "O-ring groove dimensions, reciprocating (dynamic) gland, piston and rod, AS568",
 "kind": "standard",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "How deep and wide is the groove for an AS568 O-ring on a sliding piston or rod?",
 "tags": [
  "o-ring",
  "gland",
  "groove",
  "dynamic seal",
  "reciprocating",
  "as568",
  "seal",
  "standard"
 ],
 "aliases": [
  "dynamic o-ring groove",
  "o-ring groove dimensions piston",
  "reciprocating o-ring gland",
  "rod seal o-ring groove",
  "o ring groove depth dynamic",
  "o ring gland design",
  "as568 -2xx groove",
  "piston groove o-ring",
  "o ring squeeze dynamic",
  "hydraulic o-ring groove"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 10,
 "url": "https://xemstudio.com/objects/oring-gland-dynamic-reciprocating-as568/",
 "sheet_txt": "https://xemstudio.com/objects/oring-gland-dynamic-reciprocating-as568/sheet.txt",
 "sheet": {
  "basis": "Parker O-Ring Handbook ORD 5700, Design Chart 5-2 (Industrial Reciprocating O-Ring Packing Glands), AS568 cross-sections .070 to .275 in",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Depth L is the radial gland depth: the distance from the bore (piston seal) or the rod surface (rod seal) to the groove bottom. Piston gland: groove root Ø = bore Ø - 2L. Rod gland: groove root Ø = rod Ø + 2L. Widths G, G1, G2 are for no, one and two back-up rings.",
   "Squeeze, depth and clearance are tabulated as ranges because the O-ring, groove and bore each carry a tolerance. All figures are inches as printed; the sample files use the middle of each range, stated in the file notes.",
   "Reciprocating means a rod or piston slides through the ring: the squeeze is lower than static (about 8 to 25%) so the ring does not drag or heat. Widths, radii, diametral clearance and eccentricity are the same as for the static chart; only depth and squeeze change.",
   "The chart prints a surface finish of 32 RMS without a back-up ring and 63 RMS with one; corners are broken about .005 in radius, lead-in 0 to 5 degrees.",
   "Files: for each of the five cross-sections a piston-style sample ring (grooves in the outside) and a rod-style sample block (grooves in the bore), each carrying the three widths (no / 1 / 2 back-up) side by side, in true section at a sample diameter of 2.000 in. Groove-bottom corners are rounded at the middle of the printed radius range; the groove mouth is broken at the printed 0.005 in radius. Walls are square (the drawing's 0 to 5 degree draft is not modelled).",
   "Back-up rings themselves are not modelled, and nothing here is a tolerance or fit statement for your own machining or print process: add your process allowance."
  ],
  "table": {
   "columns": [
    "AS568 series (dash sizes)",
    "cross-section W, in",
    "gland depth L, in",
    "squeeze, in",
    "squeeze, %",
    "diametral clearance, in",
    "groove width G, no back-up, in",
    "G1, 1 back-up, in",
    "G2, 2 back-ups, in",
    "groove radius R, in",
    "max eccentricity, in"
   ],
   "rows": [
    [
     "-0xx (006 to 012)",
     "0.070 ± 0.003",
     "0.055 to 0.057",
     "0.010 to 0.018",
     "15 to 25",
     "0.002 to 0.005",
     "0.093 to 0.098",
     "0.138 to 0.143",
     "0.205 to 0.210",
     "0.005 to 0.015",
     "0.002"
    ],
    [
     "-1xx (104 to 116)",
     "0.103 ± 0.003",
     "0.088 to 0.090",
     "0.010 to 0.018",
     "10 to 17",
     "0.002 to 0.005",
     "0.140 to 0.145",
     "0.171 to 0.176",
     "0.238 to 0.243",
     "0.005 to 0.015",
     "0.002"
    ],
    [
     "-2xx (201 to 222)",
     "0.139 ± 0.004",
     "0.121 to 0.123",
     "0.012 to 0.022",
     "9 to 16",
     "0.003 to 0.006",
     "0.187 to 0.192",
     "0.208 to 0.213",
     "0.275 to 0.280",
     "0.010 to 0.025",
     "0.003"
    ],
    [
     "-3xx (309 to 349)",
     "0.210 ± 0.005",
     "0.185 to 0.188",
     "0.017 to 0.030",
     "8 to 14",
     "0.003 to 0.006",
     "0.281 to 0.286",
     "0.311 to 0.316",
     "0.410 to 0.415",
     "0.020 to 0.035",
     "0.004"
    ],
    [
     "-4xx (425 to 460)",
     "0.275 ± 0.006",
     "0.237 to 0.240",
     "0.029 to 0.044",
     "11 to 16",
     "0.004 to 0.007",
     "0.375 to 0.380",
     "0.408 to 0.413",
     "0.538 to 0.543",
     "0.020 to 0.035",
     "0.005"
    ]
   ]
  }
 },
 "sheet_text": "O-ring groove dimensions, reciprocating (dynamic) gland, piston and rod, AS568 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/oring-gland-dynamic-reciprocating-as568/  (sheet CC BY 4.0)\nBasis: Parker O-Ring Handbook ORD 5700, Design Chart 5-2 (Industrial Reciprocating O-Ring Packing Glands), AS568 cross-sections .070 to .275 in\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Depth L is the radial gland depth: the distance from the bore (piston seal) or the rod surface (rod seal) to the groove bottom. Piston gland: groove root Ø = bore Ø - 2L. Rod gland: groove root Ø = rod Ø + 2L. Widths G, G1, G2 are for no, one and two back-up rings.\n- Squeeze, depth and clearance are tabulated as ranges because the O-ring, groove and bore each carry a tolerance. All figures are inches as printed; the sample files use the middle of each range, stated in the file notes.\n- Reciprocating means a rod or piston slides through the ring: the squeeze is lower than static (about 8 to 25%) so the ring does not drag or heat. Widths, radii, diametral clearance and eccentricity are the same as for the static chart; only depth and squeeze change.\n- The chart prints a surface finish of 32 RMS without a back-up ring and 63 RMS with one; corners are broken about .005 in radius, lead-in 0 to 5 degrees.\n- Files: for each of the five cross-sections a piston-style sample ring (grooves in the outside) and a rod-style sample block (grooves in the bore), each carrying the three widths (no / 1 / 2 back-up) side by side, in true section at a sample diameter of 2.000 in. Groove-bottom corners are rounded at the middle of the printed radius range; the groove mouth is broken at the printed 0.005 in radius. Walls are square (the drawing's 0 to 5 degree draft is not modelled).\n- Back-up rings themselves are not modelled, and nothing here is a tolerance or fit statement for your own machining or print process: add your process allowance.\n\nAS568 series (dash sizes)  cross-section W, in  gland depth L, in  squeeze, in  squeeze, %  diametral clearance, in  groove width G, no back-up, in  G1, 1 back-up, in  G2, 2 back-ups, in  groove radius R, in  max eccentricity, in\n-0xx (006 to 012)  0.070 ± 0.003  0.055 to 0.057  0.010 to 0.018  15 to 25  0.002 to 0.005  0.093 to 0.098  0.138 to 0.143  0.205 to 0.210  0.005 to 0.015  0.002\n-1xx (104 to 116)  0.103 ± 0.003  0.088 to 0.090  0.010 to 0.018  10 to 17  0.002 to 0.005  0.140 to 0.145  0.171 to 0.176  0.238 to 0.243  0.005 to 0.015  0.002\n-2xx (201 to 222)  0.139 ± 0.004  0.121 to 0.123  0.012 to 0.022  9 to 16  0.003 to 0.006  0.187 to 0.192  0.208 to 0.213  0.275 to 0.280  0.010 to 0.025  0.003\n-3xx (309 to 349)  0.210 ± 0.005  0.185 to 0.188  0.017 to 0.030  8 to 14  0.003 to 0.006  0.281 to 0.286  0.311 to 0.316  0.410 to 0.415  0.020 to 0.035  0.004\n-4xx (425 to 460)  0.275 ± 0.006  0.237 to 0.240  0.029 to 0.044  11 to 16  0.004 to 0.007  0.375 to 0.380  0.408 to 0.413  0.538 to 0.543  0.020 to 0.035  0.005\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Parker Hannifin O-Ring Division (chart as copied by All Seals Inc.): Parker O-Ring Handbook ORD 5700, Design Chart 5-2: Industrial Reciprocating O-Ring Packing Glands — web — Publisher's page; dimensions are facts — https://allsealsinc.com/pdfs/Dynamic-oring-glands.pdf\n- Parker Hannifin O-Ring Division: Parker O-Ring Handbook ORD 5700 (full handbook, Sections IV and V: static and dynamic O-ring sealing) — web — Publisher's page; dimensions are facts — https://discover.parker.com/Parker-ORing-Handbook-ORD-5700\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/oring-gland-dynamic-reciprocating-as568/index.json\nAPI: https://xemstudio.com/api/geometry?object=oring-gland-dynamic-reciprocating-as568\n",
 "sources": [
  {
   "publisher": "Parker Hannifin O-Ring Division (chart as copied by All Seals Inc.)",
   "title": "Parker O-Ring Handbook ORD 5700, Design Chart 5-2: Industrial Reciprocating O-Ring Packing Glands",
   "url": "https://allsealsinc.com/pdfs/Dynamic-oring-glands.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Parker Hannifin O-Ring Division",
   "title": "Parker O-Ring Handbook ORD 5700 (full handbook, Sections IV and V: static and dynamic O-ring sealing)",
   "url": "https://discover.parker.com/Parker-ORing-Handbook-ORD-5700",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
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  "sheet_free": true,
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  "tolerance_mm": null
 },
 "related": [
  "as568-o-rings",
  "oring-gland-static-radial-as568",
  "oring-grooves-metric",
  "o-rings-metric"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. 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.",
 "mating": [],
 "faq": [
  {
   "q": "How deep is the groove for a -2xx O-ring on a moving piston?",
   "a": "L = .121 to .123 in (squeeze .012 to .022 in, 9 to 16%); groove .187 to .192 in wide with no back-up ring."
  },
  {
   "q": "What is the maximum eccentricity for a -3xx dynamic gland?",
   "a": ".004 in (cross-section .210 in); diametral clearance .003 to .006 in."
  },
  {
   "q": "Why is a dynamic groove shallower to the O-ring than a static one?",
   "a": "The chart sets less squeeze for a sliding seal: e.g. -2xx static squeeze 16 to 23% against 9 to 16% reciprocating, so the groove is about .010 in deeper."
  }
 ],
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   "note": "-0xx series, cross-section 0.070 in: gland depth 0.0560 in, groove-bottom radius 0.0100 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.0955 / 0.1405 / 0.2075 in. Piston-style sample ring (grooves in the outside): bore 2.000 in, piston Ø 1.9965 in (bore less the mid diametral clearance 0.0035 in), hole Ø 1.000 in, 0.200 in lands. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-0xx series, cross-section 0.070 in: gland depth 0.0560 in, groove-bottom radius 0.0100 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.0955 / 0.1405 / 0.2075 in. Rod-style sample block (grooves in the bore): rod Ø 2.000 in, housing bore Ø 2.0035 in (rod plus the mid diametral clearance), groove root Ø 2.1120 in, 0.200 in lands, 0.500 in wall outside the root. Middle of each printed range; the layout is a sample, not a standard."
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   "stl": "https://xemstudio.com/files/hardware/oring-gland-dynamic-reciprocating-as568/gland-dynamic-piston-sample-cs103.stl",
   "note": "-1xx series, cross-section 0.103 in: gland depth 0.0890 in, groove-bottom radius 0.0100 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.1425 / 0.1735 / 0.2405 in. Piston-style sample ring (grooves in the outside): bore 2.000 in, piston Ø 1.9965 in (bore less the mid diametral clearance 0.0035 in), hole Ø 1.000 in, 0.200 in lands. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-1xx series, cross-section 0.103 in: gland depth 0.0890 in, groove-bottom radius 0.0100 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.1425 / 0.1735 / 0.2405 in. Rod-style sample block (grooves in the bore): rod Ø 2.000 in, housing bore Ø 2.0035 in (rod plus the mid diametral clearance), groove root Ø 2.1780 in, 0.200 in lands, 0.500 in wall outside the root. Middle of each printed range; the layout is a sample, not a standard."
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   "stl": "https://xemstudio.com/files/hardware/oring-gland-dynamic-reciprocating-as568/gland-dynamic-piston-sample-cs139.stl",
   "note": "-2xx series, cross-section 0.139 in: gland depth 0.1220 in, groove-bottom radius 0.0175 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.1895 / 0.2105 / 0.2775 in. Piston-style sample ring (grooves in the outside): bore 2.000 in, piston Ø 1.9955 in (bore less the mid diametral clearance 0.0045 in), hole Ø 1.000 in, 0.200 in lands. Middle of each printed range; the layout is a sample, not a standard."
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   "stl": "https://xemstudio.com/files/hardware/oring-gland-dynamic-reciprocating-as568/gland-dynamic-rod-sample-cs139.stl",
   "note": "-2xx series, cross-section 0.139 in: gland depth 0.1220 in, groove-bottom radius 0.0175 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.1895 / 0.2105 / 0.2775 in. Rod-style sample block (grooves in the bore): rod Ø 2.000 in, housing bore Ø 2.0045 in (rod plus the mid diametral clearance), groove root Ø 2.2440 in, 0.200 in lands, 0.500 in wall outside the root. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-3xx series, cross-section 0.210 in: gland depth 0.1865 in, groove-bottom radius 0.0275 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.2835 / 0.3135 / 0.4125 in. Piston-style sample ring (grooves in the outside): bore 2.000 in, piston Ø 1.9955 in (bore less the mid diametral clearance 0.0045 in), hole Ø 1.000 in, 0.200 in lands. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-3xx series, cross-section 0.210 in: gland depth 0.1865 in, groove-bottom radius 0.0275 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.2835 / 0.3135 / 0.4125 in. Rod-style sample block (grooves in the bore): rod Ø 2.000 in, housing bore Ø 2.0045 in (rod plus the mid diametral clearance), groove root Ø 2.3730 in, 0.200 in lands, 0.500 in wall outside the root. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-4xx series, cross-section 0.275 in: gland depth 0.2385 in, groove-bottom radius 0.0275 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.3775 / 0.4105 / 0.5405 in. Piston-style sample ring (grooves in the outside): bore 2.000 in, piston Ø 1.9945 in (bore less the mid diametral clearance 0.0055 in), hole Ø 1.000 in, 0.200 in lands. Middle of each printed range; the layout is a sample, not a standard."
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   "note": "-4xx series, cross-section 0.275 in: gland depth 0.2385 in, groove-bottom radius 0.0275 in, mouth edge break 0.005 in, widths no / 1 / 2 back-up ring 0.3775 / 0.4105 / 0.5405 in. Rod-style sample block (grooves in the bore): rod Ø 2.000 in, housing bore Ø 2.0055 in (rod plus the mid diametral clearance), groove root Ø 2.4770 in, 0.200 in lands, 0.500 in wall outside the root. Middle of each printed range; the layout is a sample, not a standard."
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}