I am sensitive to noise and use good quality sound blocking earmuffs. My 735 may be the loudest of my tools but the earmuffs bring the sound down low enough that it isn't an issue.
Member
I am sensitive to noise and use good quality sound blocking earmuffs. My 735 may be the loudest of my tools but the earmuffs bring the sound down low enough that it isn't an issue.
Member
I don't have a problem with loudness from my DW735. Perhaps it's because I'm almost deaf.Sometimes a negative is good.
Thoughts entering one's mind need not exit one's mouth!
As I age my memory fades .... and that's a load off my mind!
"We Live In The Land Of The Free, Only Because Of The Brave"
“The problems we face today are there because the people who work for a living are outnumbered by those who vote for a living."
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill
Contributor
Downloaded 2 apps for sound measurement (Sound Meter Pro (same as Julie used) and Sound Meter (top rated)) and took measurements in my basement shop. It has concrete floor and walls. All measurements were at 3 ft from sources and 3 ft above floor level.
Both sets of results are BOGUS!! None exceeded 79 dB. The second app had slightly higher results.
Planer (with spiral head)..........78 dB
2 HP, 8" jointer ......................78 dB
1.5 HP Delta dust collector ......76 dB
Table saw .............................74 dB
Air cleaner (on low setting) .....61 dB
Under load, the jointer (edge jointing 1" board) and planer (3" wide maple) readings increase by 1 dB. One should be able to carry on conversations with a little effort at these levels. That is not the case with any of these machines except the air cleaner. My guess, is that the microphone and processing on my phone (Samsung 7) dampen the readings.
I am tempted to get my hands on a real SPL meter to see the actual levels. I also wonder why my readings are so different from Julie's. Different phone?
Originally Posted by Julie Moriarty
Rustic? Well, no. That was not my intention!
Contributor
If you buy the 3M 1100 earplugs and put them in your ears by the instructions, they work better then most other ear plugs.
You have to pull the top of your ear up and rearward while inserting the ear plug. Let the earplug expand for a few seconds and then release your ear.
I have worked around 20 to 30- 50 ton to 300 ton metal stamping presses and the noise level was like going into a war zone every morning.
I wore those earplugs and Peltor -30Db ear muffs and my hearing is still fine at 62.
I own the Dewalt 734 and do think it is quite loud.
[OP]
Member
I have a Samsung Galaxy J7. It's about 6 months old. Don't know if that makes any difference though.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness..." - Mark Twain
Contributor
All those dB readings are still below the upper safe numbers with good hearing protection. I use foam in-ear plugs which cut noise by 30 dB. I would never operate any of my machines without hearing protection so the noise isn’t relevant for me considering the 735 gives me superior results.
Contributor
I have this planer, and I have found that 3 cents' worth of ear plugs solves the problem. On the other hand, I have a Rikon planer/jointer which is nearly silent, and naturally, one wonders whether DeWalt could have spent 10 dollars more and made the 735 equally quiet.
Makes me wonder what kind of motor is in there and how hard it would be to replace it with one from Ebay.
Is it the motor that makes the noise or the blower? If it's the blower, I guess there is no solution.
Cry "Havoc," and let slip the dogs of bench.
I was socially distant before it was cool.
A little authority corrupts a lot.
Member
I have the 734 which is also incredibly loud. It doesn't have the blower, so that's definitely not all of it.
Contributor
I read that the cheap universal motor is the problem. For kicks I looked into the difficulty of putting an induction motor in its place, and I was told that there are no standard NEMA sizes for universal motors, so you can't just look up a frame number and do a swap.
Cry "Havoc," and let slip the dogs of bench.
I was socially distant before it was cool.
A little authority corrupts a lot.
Moderator
Steve, I think that quite often, you'll find that so-called "universal motors" are just not that. Many are designed into the tool and machines like portable planers are like that because of how things need to fit together in a compact form factor.
--
The most expensive tool is the one you buy "cheaply" and often...
Contributor
I think they're called "Universal motors" because they can operate on AC or DC, not because they can fit anywhere. Wikipedia has an article on them.
But the reason they're used has to do with HP and physical size. HP for a motor is calculated by taking the torque times the RPM, times a numerical factor. An induction motor, operated at 60 Hz, has a maximum RPM of 3600, and will actually be less because slip is required for it to operated. That's why a 2-pole, 60 Hz, induction motor is usually rated at 3450 RPM (at full load). Since the induction motor has a fairly low RPM, it has to have a lot of torque to produce a certain amount of HP, and that makes the induction motor big. Note that a 2HP 4-pole, 1725 RPM motor will be physically larger than a 2HP 2-pole 3450 RPM motor. The 4-pole motor has to produce twice the torque as the 2-pole motor and that means bigger field coils.
The universal motor removes that RPM limitation. It's fairly common for a universal motor to operate at 20,000 or more RPM. And that means it doesn't have to produce as much torque to produce 2HP as a 2 HP 2-pole induction motor. Since it doesn't have to produce as much torque, the field coils can be quite a bit smaller, leading to a much smaller motor.
The major disadvantages of universal motors are that the brushes require maintenance and the high RPMs generate more noise. Note that brushless motors are essentially universal motors without the brushes - but have a fair amount of electronics. Brushless motors are limited in HP because they require permanent magnets for the rotor and there's a limit to the strength of the magnets you can fit on a rotor.
Mike
[Aircraft during WWII (and probably other times) used 400Hz power systems. This allowed induction motors to be quite a bit smaller (and lighter) than if they had used 60 Hz.]
Last edited by Mike Henderson; 03-10-2018 at 10:30 PM.
Go into the world and do well. But more importantly, go into the world and do good.
Contributor
I think they're both offenders and I think it unlikely an induction motor could be fitted. I do seem to recall someone that had their DW735 hooked up to a regular dust collector or cyclone that removed the fan, the dust collection was still okay and the machine was quieter. I imagine that removing the fan and fitting a spiral head would be quieter but a DW735 + spiral head is getting near a 15" cast iron planer $$, especially used.
Contributor
Curt: In my previous reply, I mentioned that I had removed the dust extraction impeller and it quieted my 735 down quite a bit. It's still not quiet like a big, floor standing planer with a spiral head, but the neck breaking scream is gone, and dust collection is still excellent.
Grant
Ottawa ON
Member
When you have to call and get a quote, the price point may not make Hammer a viable option.
Why does Dewalt make their planer so loud? because they hate us.
I just sold my floor planer and bought the 735 (again) it was my first planer, I sold it when I bought a 15” Grizzly. I love it. Not much anyone can do about neighbor complaints, I don’t have that problem and the wife understands. It’s not like it runs constantly. I wear hearing protection.
I do have another planer that is just slightly quieter although it only runs on a quarter or less horsepower. It’s called a scrub plane.
Member
That is the only way you can find the actual dB readings. It is a well known issue that those digital meters don't give you correct readings. My vac, as loud as a plane taking off, was under 80dB according to one of these phone meters.
Simon
Posting Permissions
Reply With Quote