Positioning and assembly aids
Support a light-duty positioning or assembly task with geometry shaped around the relevant interfaces.
Spark & Spool · Design + production
JIGS, FIXTURES, GUARDS AND PRODUCTION AIDS
3D-Printed Jigs, Fixtures, Guards & Production Aids
Improve a bounded setup, positioning, assembly, inspection, routing, marking, masking, or handling task. Locating aids, assembly guides, drill templates, inspection fixtures, holders, trays, and by-project guards begin with the real task, interfaces, load, and consequence of failure.
Applications
Practical tools for a repeatable task.
An effective jig or fixture begins with the task, not a generic shape. Share the surrounding geometry, handling needs, and the point in the process where the tool will be used.
Guides and templates
Create a physical reference for a repeatable action when a printed tool is appropriate for the application.
Organizers
Arrange tools, components, or work-in-process around the way a team actually uses them.
Utility tools
Develop a simple shop-floor aid, evaluate a pilot, and refine it before scheduling additional parts.
Quoted complete-part additions
Approved inserts, hardware, identifiers, labels, simple bounded assembly, packing lists, and per-station kits may be added only when the quote defines the component, instruction, count, and completeness check.
Minomi & Karakuri applications
Custom Part Carriers & Mechanical Handling
Make standard material-handling equipment work with your particular part. We develop custom carriers, nests, guides, and mechanical interfaces for defined workstation and lean-manufacturing applications.
Combine specified commercial framing, tracks, and hardware with 3D-printed components shaped for your product and process.
Part Presentation
Reusable carriers, hangers, and nests shaped for the part and the orientation needed at the workstation.
Simple Mechanical Handling
Guides, contact pieces, and release interfaces reviewed for one-at-a-time carrier presentation in gravity- or spring-assisted arrangements.
Carrier Return
Custom transitions, guides, and contact components for a defined empty-carrier return path.
Modular Changeover
Swap the part-specific nest or carrier interface and retain compatible structure where the design permits.
Minomi and Karakuri in practice
Minomi means handling and presenting parts directly on supports, fixtures, or hangers instead of in boxes or bins. It can be entirely manual.
Karakuri uses gravity, springs, levers, or other simple mechanical arrangements to assist movement. Each application needs load, motion, and stored-energy review.
Printed geometry and materials
Printed contact shapes and interchangeable nests can suit small quantities without dedicated molds. Fit review guides revisions. Compatible features can be combined where manufacturable, and accepted parts can be made again from a recorded design and production basis.
A reviewed nylon grade may suit contact parts, TPU may suit pads or compliant features, and PETG or other FDM materials may suit noncritical interfaces or demonstrators. Framing, pivots, springs, shafts, bearings, and structural hardware are specified separately.
Discuss a Material-Handling Application
These are by-project applications. Before committing to manufacture, we review suitability, materials, loads, geometry, and operating limits. Pinching, falling parts, and stored energy require review. Safety-critical restraints, overhead loads, and safety-rated stop or release functions are outside this offer.
Start with a short description or photo of the part and handling step. Dimensions, weight, frame or track details, quantity, timing, and location help when known.
Custom-order minimum: $200. Paid application review, design, development, and physical qualification are scoped and quoted separately.
Discuss a Material-Handling ApplicationOpens your email app. engineering@sparkandspoolco.com
Use our short inquiry form for the same project inquiry.
Technical review
What we review before quoting.
The review needs more than a model. It needs the task, interfaces, environment, quantity, and the criteria the tool must satisfy in use.
The task
Describe who will use the tool, what step it supports, and what needs to remain repeatable.
Interfaces
Identify the surfaces, parts, equipment, or hand positions the jig or fixture must work around.
Environment
Call out heat, moisture, chemicals, flexibility, and other conditions relevant to material selection.
Pilot and quantity
Confirm how many are needed for the first trial and whether more may be ordered later.
Best starting point
Send a STEP, parametric CAD, or STL file when one exists. Include the intended task, surrounding geometry, quantity, deadline, and acceptance criteria. Clear photos and basic dimensions can start a separate design-support review when there is no usable file.
Service limits
Machine, finger, sensor, and protective guards are non-safety-critical BY PROJECT only. Soft jaws and hand-press fixtures require load and failure review. Printed aids do not replace machine-guarding compliance, lockout/tagout, operator training, inspection or calibration, or customer system validation.
Have a part in mind?
Put open capacity to work.
Send a production-ready file—or bring the problem that needs engineering.
Capacity is open now for first articles, short runs, overflow work, and new repeat programs.