Extruder barrel cooling duct (40mm)
thingiverse
This cooling duct is intended for a J-Head barrel and features a 40mm fan mount in front of the x-carriage. It cools only the barrel and not the parts. The design requires mounting beneath the carriage above the heater block, with the fan on the front side. Note that it may not fit a Mendel; adjustments may be necessary. Two M3 threaded mounting holes are 19.6mm apart. The duct measures 18mm thick and approximately 38mm wide.
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