About This File
The Manticore 3D Printed Non Conductive Shaft Extension was designed to alleviate issues caused by having a conductive carbon fibre lower shaft bolted directly to the coil. This is particularly important for gold prospectors who experience knock sensitivity when laying the shaft flat against the coil during target recovery, but it may also have benefits during the target search, especially when working tight rocky terrain where the coil is constantly being knocked and/or rotated relative to the shaft. The product has been designed in three parts so that the layers can be 3D printed in line-of-force to increase strength and prevent delamination during use.
You will need to buy 2x 40mm M8 nylon hex bolts and nuts - I sourced mine from here.
For each assembly, you will need to 3D print 1x shaft extension, 1x clamp, 1x clevis and 2x thumbwheels. To assemble, glue the clevis to the front of the shaft extension (preferably with epoxy) - it’s been designed to only fit to the front to avoid mix-ups. Glue the clamp to the rear of the shaft extension, making sure that it’s oriented in the same direction as the clevis mount (facing upwards). Seat the M8 nuts into the clevis and clamp rebates and the two 40mm bolts into the thumbwheels. It's helpful to epoxy the bolts and nuts in place, but be careful not to get glue in the threads. Snap the shaft-extension assembly to the Manticore’s lower shaft, thread its stock bolt through the clevis and tighten in place. Thread one 40mm bolt/thumbwheel through the rear clamp and tighten (avoid over tightening) and the other to mount your favourite coil to the 3D printed clevis. Happy hunting!
Creative Commons licence - CC BY-NC-SA
