Shaft Coupler V1

implemented unverified

Rigid shaft coupler: two blind coaxial bores (a solid mid web keeps the shafts from butting) with a teardrop set screw per section — stepper-to-leadscrew, motor-to-spindle, any two round shafts. Torque honesty out loud: set-screw preload and plastic creep set the limit — hobby duty, never a certified drive coupling. D-shaft flats wait for a partial-cut iteration.

Built from a real example — orbit to inspect.

Declaration example

A minimal product declaration for this archetype — exposed parameters at their defaults. Validate and build it with forge validate / forge build.

schema: product/v1
id: my_shaft_coupler
archetype: shaft_coupler_v1@1

params:
  shaft_d_a: 5mm
  shaft_d_b: 8mm
  length: 25mm

Parameters

parameter	type	default	range	role
`shaft_d_a`shaft A diameter (5 = NEMA17)	`length`	`5mm`	`2mm … 12mm`	assembly	exposed
`shaft_d_b`shaft B diameter (8 = a common leadscrew)	`length`	`8mm`	`2mm … 12mm`	assembly	exposed
`fit_clearance`	`length`	`0.25mm`	`0.15mm … 0.4mm`	manufacturing
`body_d`0 = auto (largest shaft + 8)	`length`	`0mm`	`0mm … 30mm`	structural
`length`	`length`	`25mm`	`15mm … 50mm`	functional	exposed
`mid_web`	`length`	`3mm`	`2.5mm … 8mm`	structural
`set_screw`	`choice`	`m4`	`m3 \| m4`	assembly