Replacing a Gigabot nozzle

Overview

Important Note About Nozzle Replacement:

Replacing a nozzle on a Gigabot is a precision procedure and is not recommended unless you have the proper tools and experience, including the use of a torque wrench. The nozzle threads directly into the heater block and must be tightened to a specific torque to ensure proper sealing and reliable operation.

Nozzles may need to be replaced due to clogs, normal wear or erosion, or when changing the orifice size to adjust print resolution. However, the aluminum threads in the heater block are limited in how many times they can be reused. In most cases, the nozzle can only be replaced one to two times before the threads are no longer able to hold the nozzle securely. Once this occurs, a complete hot end replacement is required.

Video Instructions:

For a brief video covering this process for a standard hot end you may watch this video: How to Change a Nozzle.

Written Installation Instructions:

1. Determine that you have to remove the Gigabot nozzle and can’t avoid it. Cold pulls can help unclog nozzles.
2. Our nozzles are made by Microswiss. The standard nozzles are nickel plated brass with a 0.4mm orifice and M6 thread, but you can choose from any at this link: Online Store or contact our [e-mail] or [e-mail] for more purchasing information.
3. Heat up the hot end to 180°C
4. Put cardboard or other similar material beneath the nozzle to protect the bed in case the nozzle falls after unscrewing it. A hot nozzle that falls on the bed can damage the PrintinZ print surface.
5. Use pliers to grip the heater block to prevent it from rotating while unscrewing the nozzle.
6. Use a 7mm wrench to unscrew the nozzle. It should be turned clockwise if looking down at the bed or counter-clockwise if looking up from the bed.
7. After removal, place the hot nozzle on a surface that can withstand the high temperature while the nozzle cools.
8. With the hot end still hot, take your replacement nozzle and screw it into the heater block, stopping before its tight
9. Next you will need to use a torque wrench to tighten the nozzle to the below specs:
   1. If you are replacing the nozzle on a standard size hot end:
      • 27.5 in-lbs. if the hot end is heated to 180°C
      • 34.5 in-lbs. if the hot end is room temperature (only applicable if the hot end is unused)
   2. If you are replacing the nozzle on our Mondo heater block
      • 31.5 in-lbs. if the hot end is heated to 180°C
      • 39.5 in-lbs. if the hot end is room temperature (only applicable if the hot end is unused)

Questions or concerns? Reach out to our support team at support@re:3D.org or open a support ticket.