Hub Drawing
GD&T
important features/interfaces | constrained w/ | why | |
|---|---|---|---|
| 1 | ID to ??? is there a ret ring here | Datum A label | Easy to use for inspection, and used for total runout callouts. |
| 2 | OD to wheel | Total Runout | This surface is sized, located, and concentric to A, so it’ll ideally fit within the wheel’s hole. |
| 3 | Sprocket shaped feature to wheel | Perpendicularity | Fit with wheel on both plane interfaces. |
| 4 | ID to axle | Total Runout | Spins on same axis as A, won’t make part “wobbly” while rotating |
| 5 | Sprocket shaped feature to rotor | Perpendicularity | Same as 3 |
| 6 | Tapped holes w/ bolts | Datum C, Position | Size, perpendicular to surface (in accordance w/ nominal feature). The MMC modifier here means that if the hole is smaller, there is more tolerance (orientation/location wise) and vice versa. Datum C fully constrains hub and is useful for constraining second set of holes. |
| 7 | Thru holes w/ bolts | Position | Same as ̉6 |
additional notes:
using ASME standard for circular patterned holes
diameter callout, X? angle distance
im somewhat unclear abt fit reasoning so someone else shoudl explain that, also the hole callout formatting