Gdt Tolerance Zones: bonus_tolerance_mmc
GD&T tolerance zone data per ASME Y14.5-2018 and ISO 286-1:2010 — covering IT tolerance grades (IT1-IT14) with tabulated values in micrometers for nominal sizes 0-500mm; position tolerance at MMC using floating fastener formula T=H-F and fixed fastener formula T=(H-F)/2 for M3-M12 bolts per ISO 273 clearance holes; MMC bonus tolerance examples; datum feature simulators (RFS/RMB, MMB, LMB) per ASME Y14.5-2018 Section 7.11; profile tolerance zone types (bilateral, unilateral outside/inside, unequally disposed); geometric tolerance zone shapes (cylindrical, total width, spherical); and typical IT grades achievable by manufacturing process (lapping, grinding, turning, milling, drilling, casting).
| tolerance type | record id | description | lmc hole mm (mm) | mmc hole mm (mm) | notes | tolerance zone shape |
|---|---|---|---|---|---|---|
| bonus_tolerance_mmc | bonus_10mm_hole_mmc | 10mm hole MMC departure bonus tolerance | 10.018 | 10 | H7 hole 10mm; MMC=10.000; LMC=10.018; at LMC full bonus=0.018mm | cylindrical |
| bonus_tolerance_mmc | bonus_25mm_hole_mmc | 25mm hole MMC departure bonus tolerance | 25.021 | 25 | 25mm H7 hole; MMC=25.000; LMC=25.021; max bonus=0.021mm | cylindrical |
| bonus_tolerance_mmc | bonus_3mm_hole_mmc | 3mm hole MMC departure bonus tolerance | 3.01 | 3 | Hole 3.000-3.010mm; MMC=3.000; LMC=3.010; bonus=(actual_size - MMC); 0 at MMC to 0.010mm at LMC | cylindrical |
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