...at 4000 rpm/12" blade, you're at 12,500+ peripheral ft/minute which is pretty fast.
Wouldn't you have to have pronounced run-out to make a real difference in noise?
Possibility of a bad bearing transmitting and amplifying through the blade?
Sympathetic vibration from something else on the machine resonating in sync w/the
blade? Interesting problem! BTW, my saw is a single phase
Rod Barton wrote:
toggle quoted message
Show quoted text
Geoff,
Wow, here I thought it was the aroma of Tacoma that was making my
blades run louder, but it's the air ehh.
Actually I did find that the 12" blade running on the Felder has a
noticeably more powerful sound to it than my old Delta 10". I believe
the Felder runs at about 4000 RPM vs. 3600 RPM for most 10" saws which
would account for the increased pitch in sound. I've found that I can
cut faster and have a lot less tearout when cutting my morning bagel
now with the Felder so the coffee is still hot when I get done.
If you think that you are getting an excessively high pitched sound,
you might want to use a dial indicator to check the run-out on your
blades. The run-out or wobble as some call it, will increase blade
sound enough to drive you out of the shop. I'm sure you are aware it's
best to completely disconnected from the power source prior to checking
the blades. If you find that there is no noticeable run-out the only
other suggestion I have is to stuff a little more cotton into the old
ear protectors because what you are hearing is an industrial saw at
work.
Re: Mortis Cutter Bits. I was thinking about checking Boeing surplus
for cutters. A lot of times they have excess bins stuffed with end
mills and such.
philip tamarkin <tamarki-@...> wrote:
original article:
=219
If you're not getting a good kerf running the saw without a blade you
need to raise the
splitter a bit - should sit about 1/4" below where the top of the
blade would be if
there was a blade there.
I've got my saw set up with a nice overarm guard system
(Excalibur...) that I've hung
from the ceiling. it's got good dust collection, so maybe it sucks
up noise along with
the dust! I'll try running the saw tomorrow w/o the guard to see if
it changes the
noise levels...
The Seattle thick fog explains everything. That stuff is dense! You
might want to
bring it into your shop in thin sheets to lessen the load on the
saw...
A smart guy with some measuring equipment for the pulleys and the
ability to read the
nameplate rpms on the sawmotor could probably figure out the arbor
rpms pretty damn
fast! Best, Philip
Geoff Shepherd wrote:
Interesting... this saw runs with more noise than even my Shopsmith
(in
table saw mode), which was louder than a good contractor's saw due
to the
variable speed Reeves drive system. Cutting performance on the
BF6-31 has
been satisfactory so far, just very noisy. The other way I've
reduced the
noise is by removing the blade entirely, but then I seem to have a
problem
with the kerf not forming at all. Not sure what's up with that.
Here in the Seattle area the air is thick like good coffee. Maybe
the blades
just get all buzzed up with caffeine or something.
I have considered modifying the clear crown guard with pivoting
side guards
to help contain the noise, offer additional protection, and provide
a longer
lifting ramp in front to ride up on approaching stock. On the other
hand, if
my saw is just running too fast, then that's patching the symptom
rather
than finding the cure.
Given my sometimes preoccupation with quiet-running tools, I should
probably
go pick up one of those sound-level meters from Radio Shack. Either
that or
go completely Neanderthal... :-)
...Geoff
----- Original Message -----
From: Philip Tamarkin
To: felder-woodworking@...
Sent: Wednesday, March 22, 2000 7:04 PM
Subject: [felder-woodworking] Re: Table saw blade noise
My BF-5 runs quietly compared to my earlier cabinet saws, even with
the 12"
blades. I've got the Felder standard universal and the
fancy-schmantzy
"Silent Power" blades - the Silent Power (God, the marketing
department must
stay up late thinking of these names!) is probably a tad quieter.
Bought a
Tenryu panel blade that I'm using currently, and highly recommend -
best
blade I've ever used out of the box - similar volume to the others.
If
Felder doesn't modify the drive pulleys for 60hz/50hz they need to
- optimum
blade speed should be right around 10,000 peripheral feet per
minute - much
faster than that and you'll be doing more burning than cutting, and
will
probably kill blades pretty quickly.
On reflection, I think your noise problem may be related to your
local air -
where do you live? I'm in Mendocino county, and maybe the air here
is
thinner and causes less resistance to the blade! Might also
explain the
plethora of air-heads that we have around here!! -Philip
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