Umut CANandClaude Opus 5
49b972f007
engineering/mech/standards/fasteners.py carries ISO 4014:2011 / ISO 4017:2014 head dimensions (s, k), ISO 4032:2012 nut heights, ISO 7089:2000 washer d1/d2/h and ISO 4762:2004 socket head cap screws, plus the ISO 261:1998 coarse pitch column. bearings.py carries the ISO 15:2017 deep groove boundary dimensions for 6000-6010, 6200-6210 and 6300-6310. Only the ISO 261 first-choice sizes ship. M14/M18/M22/M27/M33, everything above M36 (above M24 for ISO 4762), the 618x/619x/16xx bearing series, bore numbers above 10 and every suffixed bearing variant are refused by name rather than interpolated: a narrow table is merely narrow, a wrong row ships a wrong workshop drawing. Across-corners e is derived geometry (2s/sqrt(3)), so no e column had to be transcribed at all, and the ISO 8826-1 cross and ISO 8826-2 element-symbol fractions are declared drawing conventions, not table values. No ActiveX member is called by this task, so no live AutoCAD probe was needed; the two modules are pure tables and pure arithmetic. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
137 lines
5.5 KiB
Python
137 lines
5.5 KiB
Python
"""ISO 15 deep groove ball bearings, plus the ISO 8826 representation rules.
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SOURCE
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------
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* ``DEEP_GROOVE`` - ISO 15:2017 Table 4: boundary dimensions ``d`` (bore),
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``D`` (outside diameter) and ``B`` (width) for the radial bearings of
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dimension series 10 (600x), 02 (620x) and 03 (630x).
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* ``SOURCE_ISO_8826_1`` - ISO 8826-1:1989, general simplified representation:
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the bearing is drawn as its envelope outline with an upright cross inside
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that does not touch the outline.
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* ``SOURCE_ISO_8826_2`` - ISO 8826-2:1994, particular simplified
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representation: the envelope outline plus a symbol for the rolling element.
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COVERAGE
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--------
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600x, 620x and 630x, bore numbers 00..10 (d = 10..50 mm) - 33 rows. Bore
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numbers 00/01/02/03 are 10/12/15/17 mm by the ISO 15 rule; 04 and up are
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``5 x bore number``. Deliberately **not** transcribed, and refused by name:
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bore numbers above 10, the wide series 622x/623x, the light series 618x/619x
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and 16xx, the inch series, and every suffixed variant (``6205-2RS``,
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``6205-Z``) - a suffix changes width and sealing, not a number this module may
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guess.
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The chamfer dimensions ``r_s`` are not transcribed either: neither simplified
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representation needs them, so no row carries a value nobody checked.
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CROSS_FRACTION and BALL_SYMBOL_FRACTION are **declared drawing conventions**,
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not transcribed dimensions. ISO 8826-1 fixes the *form* of the cross and
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requires only that it not touch the outline; ISO 15 carries no ball diameter
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at all, so the element symbol is sized as a fraction of the ring gap rather
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than invented as a real ball.
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"""
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from __future__ import annotations
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from . import Coverage, register
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SOURCE_ISO_15 = (
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"ISO 15:2017 Table 4 - rolling bearings, radial bearings, boundary dimensions "
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"(dimension series 10, 02, 03)"
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)
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SOURCE_ISO_8826_1 = (
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"ISO 8826-1:1989 - technical drawings, rolling bearings, general simplified representation"
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)
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SOURCE_ISO_8826_2 = (
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"ISO 8826-2:1994 - technical drawings, rolling bearings, particular simplified representation"
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)
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#: Fraction of the half-width / half-gap used by the ISO 8826-1 upright cross.
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#: A declared convention (see the module docstring), never a table value.
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CROSS_FRACTION = 0.6
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#: Fraction of the half-gap used by the ISO 8826-2 rolling-element symbol.
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#: A declared convention, never a ball diameter.
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BALL_SYMBOL_FRACTION = 0.6
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BEARING_SERIES = ("600x", "620x", "630x")
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_SERIES_PREFIX = {"60": "600x", "62": "620x", "63": "630x"}
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#: ISO 15:2017 Table 4 - d, D, B in millimetres.
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DEEP_GROOVE: dict[str, dict[str, float]] = {
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# dimension series 10 (600x)
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"6000": {"d": 10.0, "D": 26.0, "B": 8.0},
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"6001": {"d": 12.0, "D": 28.0, "B": 8.0},
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"6002": {"d": 15.0, "D": 32.0, "B": 9.0},
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"6003": {"d": 17.0, "D": 35.0, "B": 10.0},
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"6004": {"d": 20.0, "D": 42.0, "B": 12.0},
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"6005": {"d": 25.0, "D": 47.0, "B": 12.0},
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"6006": {"d": 30.0, "D": 55.0, "B": 13.0},
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"6007": {"d": 35.0, "D": 62.0, "B": 14.0},
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"6008": {"d": 40.0, "D": 68.0, "B": 15.0},
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"6009": {"d": 45.0, "D": 75.0, "B": 16.0},
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"6010": {"d": 50.0, "D": 80.0, "B": 16.0},
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# dimension series 02 (620x)
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"6200": {"d": 10.0, "D": 30.0, "B": 9.0},
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"6201": {"d": 12.0, "D": 32.0, "B": 10.0},
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"6202": {"d": 15.0, "D": 35.0, "B": 11.0},
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"6203": {"d": 17.0, "D": 40.0, "B": 12.0},
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"6204": {"d": 20.0, "D": 47.0, "B": 14.0},
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"6205": {"d": 25.0, "D": 52.0, "B": 15.0},
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"6206": {"d": 30.0, "D": 62.0, "B": 16.0},
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"6207": {"d": 35.0, "D": 72.0, "B": 17.0},
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"6208": {"d": 40.0, "D": 80.0, "B": 18.0},
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"6209": {"d": 45.0, "D": 85.0, "B": 19.0},
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"6210": {"d": 50.0, "D": 90.0, "B": 20.0},
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# dimension series 03 (630x)
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"6300": {"d": 10.0, "D": 35.0, "B": 11.0},
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"6301": {"d": 12.0, "D": 37.0, "B": 12.0},
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"6302": {"d": 15.0, "D": 42.0, "B": 13.0},
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"6303": {"d": 17.0, "D": 47.0, "B": 14.0},
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"6304": {"d": 20.0, "D": 52.0, "B": 15.0},
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"6305": {"d": 25.0, "D": 62.0, "B": 17.0},
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"6306": {"d": 30.0, "D": 72.0, "B": 19.0},
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"6307": {"d": 35.0, "D": 80.0, "B": 21.0},
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"6308": {"d": 40.0, "D": 90.0, "B": 23.0},
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"6309": {"d": 45.0, "D": 100.0, "B": 25.0},
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"6310": {"d": 50.0, "D": 110.0, "B": 27.0},
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}
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def bearing(designation) -> dict:
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"""Boundary dimensions of one deep groove ball bearing.
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Returns ``{"designation", "series", "source", "d", "D", "B"}``. A
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designation outside the transcribed table is refused by name; nothing is
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interpolated between series or bore numbers.
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"""
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key = " ".join(str(designation).split()).upper()
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if key not in DEEP_GROOVE:
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raise ValueError(
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"ISO 15 deep groove ball bearings are transcribed here for the 600x, 620x "
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f"and 630x series, bore numbers 00-10 (d = 10-50 mm); {key!r} is outside "
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f"that table and is never interpolated ({SOURCE_ISO_15})."
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)
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return {
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"designation": key,
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"series": _SERIES_PREFIX[key[:2]],
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"source": SOURCE_ISO_15,
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**DEEP_GROOVE[key],
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}
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def list_bearings(series: str | None = None) -> tuple[dict, ...]:
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"""Every transcribed bearing, optionally restricted to one series."""
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rows = tuple(bearing(name) for name in DEEP_GROOVE)
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if series is None:
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return rows
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name = " ".join(str(series).split()).lower()
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if name not in BEARING_SERIES:
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raise ValueError(
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f"list_bearings: series must be one of {', '.join(BEARING_SERIES)}, got {series!r}."
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)
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return tuple(row for row in rows if row["series"] == name)
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register("ISO 15", DEEP_GROOVE, Coverage(10.0, 50.0), SOURCE_ISO_15)
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