1/2" PVC to dumbbell conversion kit (lock jaw collar and inner collet)
thingiverse
Lock Jaw collar and inner collet for Half Inch PVC for use as a dumbbell For the lock jaw you're going to need... M3x20mm bolts x 3 M3 nuts x3 1 pin that is about 3mm dia x 20mm (I used a scrap steel pin wrapped in tape to get a tight fit) duct tape/electrical tape (for pads for extra grip) For the pads I used two little squares of double layered duct tape. Could use more layers if you need to for a better clamp For the inner collets you're going to need... M4x15mm bolts x2 M4 nuts x2 Duct tape for inner faces for extra grip
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