Drill Guide V1

implemented unverified

Fenceless top drill guide: a plate with a press-fit line of steel bushing seats (the steel guides the drill, never the plastic) and two countersunk hold-down screws beside the row — clamp or screw it onto layout marks. The sibling drilling_jig_v1 (showcase pack) hooks a stop fence over the workpiece edge instead; this one goes where the fence can't reach. Two independent bushing rows (each its own diameter) cover stepped drilling — pilot + clearance in one guide; angled channels are outside the axis-aligned kernel — not promised.

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_drill_guide
archetype: drill_guide_v1@1

params:
  guide_l: 100mm
  bushing_od: 8mm
  seat_count: 3
  seat_spacing: 25mm
  row_b: 0

modifiers:
  - id: fillet_soften
    target: plate_lightening

Parameters

parameter	type	default	range	role
`guide_l`	`length`	`100mm`	`50mm … 200mm`	functional	exposed
`guide_w`	`length`	`36mm`	`24mm … 70mm`	functional
`t`	`length`	`8mm`	`5mm … 12mm`	structural
`corner_r`	`length`	`4mm`	`2mm … 10mm`	aesthetic
`bushing_od`	`length`	`8mm`	`5mm … 14mm`	assembly	exposed
`press_fit`	`length`	`0.1mm`	`0.05mm … 0.2mm`	manufacturing
`seat_count`	`count`	`3`	`1 … 8`	functional	exposed
`seat_spacing`	`length`	`25mm`	`12mm … 60mm`	functional	exposed
`row_a_cy`	`length`	`0mm`	`0mm … 30mm`	functional
`row_b`enable the second bushing row (its own diameter)	`count`	`0`	`0 … 1`	functional	exposed
`row_b_od`	`length`	`5mm`	`3mm … 14mm`	assembly
`row_b_count`	`count`	`3`	`1 … 8`	functional
`row_b_spacing`	`length`	`25mm`	`12mm … 60mm`	functional
`row_b_cy`second row offset BELOW the centerline (row A stays on it)	`length`	`11mm`	`6mm … 30mm`	functional
`screw`	`choice`	`M4`	`M4 \| M5`	assembly
`screw_row_cy`	`length`	`expr(guide_w / 2 - 8)`	`4mm … 30mm`	assembly