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Why some miter saws are loud?

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Forum topic by Srini posted 08-08-2017 08:57 PM 634 views 0 times favorited 9 replies Add to Favorites Watch
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Srini

29 posts in 981 days


08-08-2017 08:57 PM

Topic tags/keywords: question

I notice some cheaper miter saws are quite loud, while expensive (yellow brand and such) are lot quieter. Wondering what causes sound? Bearings or motor or drive system or any other sources?


9 replies so far

View TungOil's profile

TungOil

1059 posts in 696 days


#1 posted 08-08-2017 10:33 PM

You basically answered your own question- cheap tools are made from cheap components with less attention to quality and loose tolerances. As with many things in life, you get why you pay for in tools. This is why many folks prefer to seek out older machinery, especially for larger equipment like table saws and such. American made machinery from the 70’s and earlier, when restored, runs silky smooth and quiet compared to most of the consumer equipment available today (notable exceptions include the current European commercial machinery, but that’s out of most people’s price range unless you have a commercial shop).

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Aj2's profile

Aj2

1878 posts in 1999 days


#2 posted 08-08-2017 10:58 PM

The expensive Miter saws use muffler bearings good muffler bearing are expensive. :)

-- Aj

View jimintx's profile

jimintx

857 posts in 1786 days


#3 posted 08-08-2017 11:04 PM


The expensive Miter saws use muffler bearings good muffler bearing are expensive. :)
- Aj2

har har ;-D

-- Jim, Houston, TX

View DS's profile

DS

3033 posts in 2621 days


#4 posted 08-08-2017 11:28 PM

Those would be the left-handed muffler bearings, right?

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

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TungOil

1059 posts in 696 days


#5 posted 08-08-2017 11:29 PM

yep, the ones in the aisle right next to the turn signal fluid.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Gene Howe's profile

Gene Howe

11064 posts in 3630 days


#6 posted 08-08-2017 11:36 PM

Across from the tire size specific air exchangers. Ya know..from summer to winter blend.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View patcollins's profile

patcollins

1687 posts in 3066 days


#7 posted 08-08-2017 11:36 PM

Some of the noise is actually the sound of the electricity flowing through the coils in the armature of the motor. As the armature turns different sections of it get electrified causing the magnetic fields to build and collapse, this is what makes it turn. This electricity flow is not a constant level but pulses, a good portion of the sound is most likely a multiple of 60.

There is also the mechanical noise from the shaft in the bearings, any gears etc in the saw, the sound of the air displacement as the armature and blade move the air out of the way, and finally sound from the brushes of the motor not riding perfect on the commutator of the motor and arcing at the backside of the brush as it crosses to a different section of the commutator.

View jimintx's profile

jimintx

857 posts in 1786 days


#8 posted 08-09-2017 03:16 AM

Well, yeah, but what about the sonic disturbance of the teeth and gullets of the blade? Not to mention the effects of the teeth offsets, and the harmonics of carbide teeth versus plain steel teeth. Lots of factors influence the sounds produced.

-- Jim, Houston, TX

View splintergroup's profile

splintergroup

2429 posts in 1423 days


#9 posted 08-09-2017 03:50 PM

Spur gears versus helical cut.

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