🧰 Using a 65mm Spindle with the Onefinity Z-16 Carriage

If you have a Onefinity CNC with the Z-16 carriage and want to use a 65mm spindle, good news — it’s absolutely possible. While the setup has some physical limitations, it works reliably with proper installation.

This was the exact setup used on our original Onefinity Machinist system before upgrading to larger spindles, and it remains a great option for many users.

🛠 How to Install the 65mm Spindle on a Z-16 Carriage

Follow these steps carefully to ensure proper clearance and secure mounting:

1. Lower the Z-axis all the way down

   • This makes inserting the spindle into the mount easier and safer.

2. Insert the 65mm spindle into the mount, but do not tighten it yet.

3. Slowly raise the Z-axis all the way up

   • Hold the spindle firmly as you do this — move cautiously to avoid slipping or pinching.

4. Once the Z-axis is fully raised, slide the spindle upward until it just touches the Z motor bracket.

5. Tighten the spindle mount bolts to lock the spindle in position.

⚙️ What to Expect

In this mounted position, your setup will allow for about 1 inch of usable bit length from the collet to the bottom of the Z-16 carriage.

Most ¼” bits used for clearing or general carving are longer than 1 inch, so this setup works well for typical use cases.

🪵 Note: If you're working with thicker material or need more Z-axis travel, consider using our Foot Pads to raise the entire machine. This provides increased Z clearance without changing your spindle or carriage.

✅ Summary

• Yes, you can use a 65mm spindle with the Z-16 carriage.

• No additional hardware is required—just follow the steps above for correct installation.

• For more Z-capacity, consider adding foot pads to lift the entire machine.

• This method is a great way to avoid unnecessary upgrades while still expanding your machine’s capabilities.

Let us know if you’d like help identifying longer bits or other clearance-boosting accessories!