I’m looking for any advice or ideas on how to make a disconnect from a gearbox to a shaft. See picture. Machine has 10hp gear box which needs to drive a 3in diameter shaft on left which carries a heavy reel with cable. Shaft and reel is removable, but we need it to engage to the gearbox. Thought about having a hollow shaft type of gearbox which has a keyed shaft which can slide in and out to engage the coupler with the pins. If I could machine splines, I would do something different. Any ideas would be appreciated