Repair a drum mower blade disc drive gear

[Firebrick43]

So it seems. I have not seen the actual machine this gear was sitting on and since I am not a farmer my knowledge over these machines is next to nothing. But, since it had 6 rotating discs, it is probably safe to assume it was indeed a disc mower. Anyway, something that is used to cut long grass and something one should not run into a big stone.

If it had 6 spindles, definitely was a disc mower, or I should say I have never seen a 6 drum mower. A disc mower drives the spindles from the bottom, drum mowers from the top.

All disc mowers use an oil bath gear driven spindles, the spindle gear and two idler gears set in each section case. The cases are bolted together to get as many as needed. So the first section case has to transmit all the power for the following ones and so forth. They are heavy, expensive, and yes, don't do well with rocks. Disc mowers lay the cut crop pretty flat unless its paired with a crimper roll, aka disc bine.

Drum mowers have some variation on how they are made. Some use a 90 degree gearbox to drive a central drive shaft with bevel gears along the shaft that drive a bevel gear on each drum. Some others use a 90 degree gearbox and then use belts to drive the drums. Either way, much simpler than a disc mower

Drum mowers tend to form a windrow between the drums as a pair turn opposite of each other.