Repair a drum mower blade disc drive gear

Norppu

Norppu

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My neighbour has a drum mower with two broken blade disc drive gears.
The shaft holding the rotating blade plate had a fatigue crack that ended up breaking the shaft into two pieces.
I do a simple repair for this component by tapping a M14/1 thread to the gear and then making a stud bolt to replace the broken off part.

Shot1.jpg Shot2.jpg 00_title.jpg


In this video I am using:
- Weiler Matador SV (1972) Lathe
- Schaublin SV-51 (1955) Milling machine
 
Your neighbor should buy you a lunch for that :)
or at least an espresso
 
SLK001 said:
What is a drum mower?
Click to expand...
It is a machine to cut long grass in a field. It has multiple spinning discs that have cutting blades attached at the rim. These discs spin relatively fast, 1000 RPM and even more.
The thing has the same operating principle as a household lawn mower. It is just bigger and faster and has (in this case) 6 rotating discs instead of just 1 or 2.
 
Norppu said:
It is a machine to cut long grass in a field. It has multiple spinning discs that have cutting blades attached at the rim. These discs spin relatively fast, 1000 RPM and even more.
The thing has the same operating principle as a household lawn mower. It is just bigger and faster and has (in this case) 6 rotating discs instead of just 1 or 2.
Click to expand...
SLK001 said:
What is a drum mower?
Click to expand...

Like this?


Drum Mower-1.jpeg
Drum Mower-2.jpg
 
Firebrick43 said:
The bottom one is NOT a drum mower, it is a disc mower, two different things
Click to expand...
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.
 
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