Philbert
Chainsaw Enthusiast
- Local time
- 1:24 PM
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- 737
- Joined
- Jan 30, 2016
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- East Dakota
The 511A had a single point cam lock that a lot of people liked. Plain and simple. This is also used on all of the 'clone' grinders I have seen.My only gripe is the chain vice, just don't care for the cam lock style.
The 511AX came out with the 'self-centering', parallel jaw vise that some people said did not hold up as well with heavy use - there are some plastic shims. and other parts that wore out. Some were difficult to replace. Several comments on this in some A.S. threads.
So Oregon went back to a cam style vise lock, but the new one applies pressure to the rails from both sides, intended I presume to clamp the drive links tighter, or to clamp more drive links at the same time (Tecomec still seems to be showing the earlier styles on their website).
The 620 grinder uses a hydraulic cylinder to clamp the drive links 'automatically' as the grinder head is lowered.
Firewood Bandit's modification is intended to eliminate sideways clamping, and rely on pressure from the top and rear of the cutter.
Several different approaches!
Philbert