Modular Drill Jig with Replaceable Bushings
Print Profile(2)
Description
Parametric drilling jig for accurate vertical drilling into square stock, round dowels and flat boards.
Designed for hobby woodworking and fully customizable.
Supports:
square timber
round stock
flat boards
interchangeable drill bushings
adjustable hole spacing
variable rail length
Printable in PETG or ASA without supports.
Parametric Drill Guide Jig
This project is a fully parametric drill guide designed for hobby woodworking and workshop use.
The jig allows accurate perpendicular drilling into:
square timber
round stock
flat boards
The model was designed with fully adjustable parameters, allowing easy customization for different drilling setups and material sizes.
Main Features
Fully Parametric
You can easily customize:
rail length
hole count
hole spacing
arm thickness
drill diameter
fastener size
embedded nut option
The rail length updates automatically based on:
number of holes
hole spacing
Replaceable Drill Bushings
Bushings are fully replaceable and can be printed separately.
Supported Materials
The jig can be used for:
square beams
round dowels
flat boards
Recommended working range:
square stock: approx. 20–80 mm
round stock: approx. Ø20–65 mm
Printing Recommendations
Recommended Materials
PETG
ASA
PETG works surprisingly well even for the guide bushings.
ASA is recommended for:
higher wear resistance
workshop environments
long-term durability
Print Settings
Suggested Settings
Nozzle: 0.4 mm
Layer height: 0.2 mm
Walls: 4–5
Infill: 25–40%
Infill type: Gyroid
Supports: Not required
Important Notes
The bushings are also printable in PETG or ASA.
Because every printer and filament behaves differently, hole tolerances may require small adjustments depending on:
printer calibration
filament shrinkage
extrusion tuning
If needed, slightly adjust the bushing clearance in the parameters.
Adjustable Parameters
Parameter Description
P_arm_length Arm length
P_hole_count Number of guide holes
P_hole_spacing Hole spacing
P_rail_height Rail height
P_arm_thickness Arm thickness
P_fastener_size M4 / M5 / M6
P_drill_diameter Drill diameter
P_embedded_nut Embedded nut YES/NO
Assembly
Required hardware:
screws according to selected fastener size
matching nuts
printed bushings
Assembly is simple and requires only basic hand tools.
Why This Design?
Most printable drill guides are fixed-size models.
This design was created to be:
modular
repairable
adjustable
scalable
easy to customize
The goal was to create a workshop-friendly drilling jig that can be adapted instead of re-designed.
Boost Me (for free)
If you like the project and want to support more fully parametric workshop tools, a Boost is greatly appreciated.
I plan to expand the system with additional guides, bushings and woodworking accessories.
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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