Changing cartridges quickly and safely during a tattoo session is a fundamental skill that every pen machine user must master. A smooth cartridge swap takes under 10 seconds and maintains session flow. A fumbled swap wastes time, risks contamination, and can damage the machine's drive mechanism. This guide covers the correct technique for standard cartridge systems used in machines from Cheyenne, FK Irons, Mast, Big Wasp, and other popular brands.
Table of Contents
1. Before You Swap — Safety First
Before removing or inserting any cartridge:
- Turn off the machine. Never insert or remove a cartridge while the machine is running. The moving drive bar can damage the cartridge mechanism and cause needle stick injuries.
- Wear gloves. Cartridges are sterile until opened and contaminated after use. Handle both new and used cartridges with gloved hands.
- Have the sharps container within reach. The used cartridge goes directly from the machine into the sharps container — no setting it down on the tray.
- Have the new cartridge opened and ready. Open the sterile packaging of the new cartridge before removing the old one, so the swap is quick.
2. Standard Cartridge Swap — Step by Step
Most pen machines from FK Irons, Mast, Big Wasp, and others use the universal cartridge system with a push-click mechanism.
1Turn off the machine — release the foot switch or power off. Confirm the motor has stopped completely.
2Grip the used cartridge: Hold the cartridge body (not the needle tip) firmly between your thumb and forefinger.
3Pull straight out: Pull the cartridge straight out from the machine grip. Most standard systems release with a firm, straight pull. Do not twist or wiggle — this can damage the drive bar or the cartridge receiver.
4Dispose immediately: Place the used cartridge directly into the sharps container. Do not set it on the tray, rinse it, or leave it exposed.
5Insert the new cartridge: Take the new sterile cartridge and push it straight into the machine's cartridge receiver until you feel (and often hear) a click. The cartridge should be fully seated with no wobble.
6Verify engagement: Gently tug the cartridge to confirm it is locked in place. It should not pull out with light force. If it does, remove and reinsert — the click mechanism may not have fully engaged.
7Adjust needle depth: After inserting a new cartridge, verify your needle depth setting. The depth may shift slightly during cartridge changes, especially if the new cartridge is from a different brand. See our Needle Depth Guide.
Never force a cartridge. If a cartridge does not insert smoothly, check that it is the correct type for your machine (standard vs. Cheyenne proprietary), that the drive bar is in the correct position, and that there is no debris in the receiver. Forcing a cartridge can bend the drive bar or damage the cam mechanism.
3. Cheyenne Safety Cartridge System
Cheyenne machines use a proprietary safety cartridge system that differs from the standard universal system. Cheyenne cartridges have a built-in membrane that prevents backflow of fluids into the machine — an important hygiene feature.
Insertion: Cheyenne cartridges push into the machine grip and lock with a spring-loaded mechanism. Push until the cartridge clicks and is flush with the grip housing. The cartridge locks automatically.
Removal: To release a Cheyenne cartridge, push the cartridge slightly further into the machine (a brief press) and the release mechanism ejects the cartridge. Some Cheyenne models have a dedicated release button. Check your specific model's manual.
Compatibility: Some newer Cheyenne machines (like the SOL Nova Unlimited) accept both Cheyenne proprietary cartridges and standard universal cartridges via an adapter or dual-compatible grip. Check your machine's specifications at tatuat.ro.
4. Mid-Session Cartridge Changes
Changing cartridges during an active tattoo session requires additional hygiene considerations:
- Set the machine down on the barrier-protected tray before starting the swap.
- If the machine sleeve is contaminated with significant ink or fluid, consider replacing it during the cartridge change.
- Open the new cartridge package without touching the sterile cartridge body — use the package as a "holder" until you are ready to insert.
- After inserting the new cartridge, dip the tip in ink and run the machine briefly to verify it is functioning correctly before resuming work on the client.
- If changing cartridge brands mid-session (e.g., from Kwadron to Mast), reassess your voltage and depth settings as different brands have different characteristics.
5. Pro Tips
Pro Tip #1 — Pre-Open Cartridges: Before a session, open and lay out the cartridges you expect to use (still in their inner packaging on a clean tray). This eliminates fumbling with sealed boxes during mid-session swaps.
Pro Tip #2 — One Brand Per Session: Sticking to one cartridge brand during a session means you do not need to readjust voltage and depth settings between swaps. This saves time and maintains consistency. Shop your preferred brand in bulk at tatuat.ro cartridges.
Pro Tip #3 — Listen for the Click: A properly seated cartridge produces an audible click. If you do not hear or feel it, the cartridge is not fully engaged. Never start the machine with a partially seated cartridge — it can eject under motor force.
Frequently Asked Questions
Can I use any cartridge brand with any pen machine?
Most pen machines accept standard universal cartridges — brands like Kwadron, Mast, Big Wasp, and many others use the same standard system. However, some Cheyenne machines use proprietary cartridges with a different locking mechanism. Check your machine's specifications. Many newer machines, including some Cheyenne models, now accept both systems.
How many cartridges do I typically use per tattoo session?
This varies widely based on the tattoo size, style, and techniques used. A simple small tattoo may use 1–2 cartridges. A complex multi-technique piece can use 5–10 or more cartridges in a single session as you switch between liners, shaders, and magnums. Always have more cartridges than you expect to need — they are single-use items and running out mid-session is unacceptable.
Can I reuse a cartridge on the same client?
Once a cartridge is removed from the machine, it should not be reinserted — even for the same client. The internal mechanism is not designed for reinsertion, and the sterile barrier has been compromised. Used cartridges should go directly into the sharps container. Use a new cartridge for each insertion.
What if a cartridge is stuck in my machine?
Do not force it. First, ensure the machine is off. Try gently rocking the cartridge left-right while pulling straight out (for standard systems). If this fails, there may be debris in the receiver or the drive bar may be in an awkward position — briefly turn the machine on and off to reposition the drive bar, then try again. If the cartridge is truly stuck, you may need to disassemble the grip section per the manufacturer's instructions.
Do I need to clean the cartridge receiver between swaps?
During a session with the same client, quick swaps do not require cleaning the receiver. Between clients, clean the receiver with a cotton swab and isopropyl alcohol as part of the full station breakdown. Ink residue builds up in the receiver over time and can affect cartridge seating if not cleaned regularly.
Stock Up on Cartridges
Kwadron, Cheyenne, Mast, Big Wasp — all configurations, all brands at tatuat.ro cartridges.
Related Guides: Needle Depth & Give · Machine Troubleshooting · Equipment Maintenance