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10th May 2016, 10:29 AM #31Senior Member
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[QUOTE=jgforsberg;1950944]Matty I have a VFD on the one saw and am going for one on the CC mostly for the brake. I do have a 500mm blade that i run at 45 hz for thick cuts on the Delta 40C. the problem with the lower speed on the DD saws is you give up power the lower the HZ and the 5 hp is a little shy to begin with. In my research i found high speeds blades from Linbide saws
Guidelines for using Linbide Saw Blade
and there 500mm recommended speed is 90m/s max rpm is 4000.
as i said my saw has a brake and i just finished a drop box[/QUOTE
A 500mm saw @ 4000rpm is 104.6m/s that is 15% over the maximum recommended safe speed for cutting hardwood and still above the max for softwood.
A 700mm saw @ 2800rpm is in the same position with a speed of 102m/s.
From Linbide's guide
he following table indicates the maximum revolutions within acceptable safety limits and without impairing the use of the saw blade, As a rule the optimum operating R.P.M. is 20% to 35% below the maximum operating revolutions. Generally saw benches, portable saws and cut-off saws have a peripheral cutting speed of 50 to 60 m/sec.
The 500mm blade on my Pickles saw @ 2800rpm is 73m/s.
Have fun,
Alli
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10th May 2016 10:29 AM # ADSGoogle Adsense Advertisement
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11th May 2016, 01:21 AM #32
I thought Motor RPMs were 2850 ? Are you guys not on 50 Hz ? I'm spinning my blades 3450 .
All tools can be used as hammers
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11th May 2016, 01:53 AM #33GOLD MEMBER
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11th May 2016, 08:06 AM #34
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4th September 2016, 03:54 PM #35Originally Posted by Alli
I've been looking at the specifications for the CC. It has 5hp to spin an 18" blade at ~3000rpm. Your AC has just 2¾ hp to spin that wopping great 27½" blade at about the same speed.
Inside the blade guard of the CC has “AC 419” cast into the 18” blade cover...
aCCNo.jpg
...suggesting that maybe the AC was only intended to have an 18” blade. Are you sure that puny motor will handle the large blade?
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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