How to Install and Change Cartridge Grips the Right Way

Cartridge grips take the brunt of a session’s wear and tear, and a grip that’s cracked, loose, or the wrong diameter can quietly wreck your control before you even notice. Knowing how to remove, install, and seat a grip correctly keeps your setup consistent from client to client and helps you catch problems before they cost you a clean line.

Understanding Cartridge Grip Systems

Most modern grips are built around a disposable tube that houses the cartridge needle and slides onto the machine’s grip threading or snap-fit collar. Grip diameters commonly run from 25mm to 35mm, and the right size depends on your hand and the amount of control you want during long sessions. Some grips also include a finger ledge or textured band, which can make a real difference during detailed linework.

Removing an Old Grip Safely

Always power down the machine and remove the cartridge before touching the grip itself. Twist the old grip counterclockwise while holding the machine body steady, and avoid yanking it sideways since this can damage the threading. Dispose of used grips and cartridges according to your local regulations for biohazard sharps, since they’ve been in contact with skin and ink.

Installing a New Cartridge Grip

Thread or snap the new grip onto the machine until it sits flush against the body with no wobble. Check that the grip’s internal channel lines up cleanly with the machine’s drive shaft, since a misaligned grip can cause the cartridge to bind or feed unevenly. If your setup uses a separate tube and tip, confirm both are seated fully before moving on to the cartridge itself.

Getting the Cartridge Seated Correctly

Insert the cartridge into the grip until you feel or hear a distinct click, which confirms the membrane has engaged with the machine’s needle bar. Give the cartridge a gentle tug to confirm it’s locked in, since a loose cartridge can shift mid-line and ruin otherwise clean work. Run the machine briefly on scrap skin to confirm smooth, consistent needle movement before starting on a client.

Common Mistakes When Changing Grips

Forcing a grip that doesn’t match your machine’s connection type is one of the fastest ways to strip threading or crack housing. Reusing a grip that shows hairline cracks around the tip can lead to ink leaks or an inconsistent seal during a session. Skipping the test run on scrap skin is another common shortcut that lets misfeeds and alignment issues slip through until they’re already visible in the work.