Jeffrey’s Pinion gear box MTB
Finished
Ready for a dab of colour
On the finishing straight
Pentographing the Pinion weld plate profile to the chain stays
As the Pinion bottom bracket weld plate is an irregular shape we needed to CNC the weld plate profile onto a block of aluminium as a pattern for the Pentograph mill
The Pentograph was then able to cut a snug fit for the chainstays to fit onto the weld plate
Chain stay / rear drop out
Pinion internal bottom bracket gear box
Meet the craftsman
The design process
