Unfortunately, I often find die cast white metal gears inside newer equipment. No wonder stuff ends up in landfills so quickly.
I'm with Lord Cavendish- Glad most of my equipment is old-school. My tiller is about 45 years old. The steel gears are like brand new with no backlash at all.
They are metal powder pressings on most line trimmers
These give a very long service life if the owners do 2 simple things
1) Never ever exceed the maximum line thickness
2) always cut at full speed
I replace a lot of bevel boxes on Honda trimmers because idiots like to run 3mm line in place of the 2.7mm max size
Most of the pros actually use the 2.5mm line because line is cheap & bevel boxes are expensive .
