Spare parts inventory: track and manage maintenance supplies

The inventory feature lets you track spare parts for your printer fleet - nozzles, belts, bearings, PTFE tubes, and more. Set stock levels, get alerted when parts run low, and let the system automatically deduct parts when maintenance tasks are completed.

Table of contents

• Adding spare parts
• Stock management
• Stock status indicators
• Low-stock alerts
• Importing default parts
• How inventory connects to maintenance tasks

Adding spare parts

To add a new part to your inventory:

1. Go to Maintenance > Inventory.
2. Click Add part.
3. Fill in the details:

• Name - descriptive name like "0.4mm Brass Nozzle" or "GT2 Timing Belt 6mm"
• SKU / part number - optional, for your own reference
• Description - what the part is and what it's used for
• Category - nozzle, bed, extruder, hotend, belt, fan, bearing, filter, PTFE tube, or other
• Quantity - how many you currently have in stock
• Unit type - pieces, meters, kilograms, grams, or milliliters
• Reorder threshold - the system alerts you when stock drops to this level
• Compatible brands - optionally limit this part to specific printer brands
• Compatible models - optionally limit to specific printer models
• Supplier info - cost per unit and buy link for easy reordering
• Image - upload a photo of the part

4. Click Add part to save.

Stock management

There are two ways stock levels change:

Manual adjustment

Click the stock adjustment button on any part to manually change the quantity. You'll be asked for a reason:

• Received - new stock arrived
• Used - parts consumed outside of maintenance tasks
• Damaged - parts that can't be used
• Inventory count - correcting the count after a physical check

You can also edit the stock quantity directly in the inventory list by clicking the number.

Automatic deduction

When a maintenance task is completed and that task has a spare part requirement, the system automatically deducts the required quantity from inventory. For example, if a "nozzle replacement" task requires 1 nozzle, completing the task reduces nozzle stock by 1.

This only works when:

• The task template has a spare part assigned (direct part or category-based)
• The task's spare part quantity is set to more than 0
• The inventory has been set up with matching parts

Stock status indicators

Each part in the inventory list shows a status badge:

• OK (green) - stock is above the reorder threshold
• Low (yellow/orange) - stock has dropped to or below the reorder threshold
• Out of stock (red) - quantity is zero

The dashboard stat card also shows a quick summary of your inventory health.

Low-stock alerts

When a part drops to or below its reorder threshold, the system:

1. Sends a notification to configured recipients
2. Fires a webhook event (maintenance.low_stock) if you have webhooks set up
3. Shows the part in the "Low stock" section of the dashboard

Importing default parts

SimplyPrint includes a library of common spare parts you can import into your inventory. Click Import default parts on the inventory tab to see what's available. Imported parts come with sensible defaults for category and description, but you'll need to set your own stock quantities and thresholds.

How inventory connects to maintenance tasks

The inventory system works hand-in-hand with task templates:

1. When creating a task template, you can assign a spare part requirement - either a specific part or a category of parts
2. When that template is used in a maintenance job, the task shows which part it needs
3. When the technician completes the task, the system prompts them to select the part (if category-based) and deducts it from stock
4. If the part is out of stock, the task can still be completed but a warning is shown

For category-based requirements, the spare part picker shows parts sorted by relevance: parts matching the printer's model first, then matching brand, then generic parts.

Read more about templates: Task templates: define reusable maintenance procedures

Read more about jobs: Maintenance jobs: scheduling and completing printer maintenance

Back to overview: Printer maintenance: keep your fleet running smoothly

Updated on: 01/04/2026