WatchUSeek Watch Forums banner
Cancel
Create thread New Forums

Miyota 9015 VS ETA 2824 movement?

Jump to Latest
21 - 40 of 49 Posts
#21 ·
dfwcowboy said:
True, but with a unidirectional some movements will not cause any winding at all, which is also where no winding happens. Until someone comes up with some sort of objective way to test one vs the other I'll remain on the fence about it. I have several watches with both and have never noticed any difference with normal wear so it's not really something I give much thought about.
Click to expand...
If I had a 9015 I'd do my walking test, which seems to be a halfway decent indicator of efficiency.
 
#22 ·
dfwcowboy said:
The biggest difference is the 2824 has a bidirectional rotor while the 9 series is unidirectional. This means when the rotor on the 9 series starts spinning it will do so longer and occassionally you will notice the sound and feel of it doing so.

As far as quality goes, I have seen nothing that suggests the ETA 2824 is objectively better than the Miyota 9 series other than the Miyota is rated at -10 to +30 seconds per day while the standard grade 2824 is +/- 12 spd. I have several examples of both and all run to within a handful of spd.

The 9015 is about 1/2 of a mm thinner than the 2825 which allows for thinner case designs.
Click to expand...
Solid information. Thank you.
 
#25 ·
ItFromDawes said:
I've seen microbrands say that the Miyota 9000 will work for over a decade without servicing while the standard ETA should be serviced or maintained 4-5 years.
Click to expand...
Two different things really. There's a good chance your cars engine will work for 50,000 miles if not significantly more without changing the oil. That doesn't mean you shouldn't have it serviced more often. Manufacturer's service recommendations are often based on the shelf life of the lubrication oils used, which is generally 4-5 years. Beyond this the oil will start to degrade and moving parts could potentially incur more wear and tear than they would otherwise. I ran a Rolex for 16 years without having it serviced and it still was working after that. When I finally had it serviced several components had to be replaced.
 
#26 ·
Not much new to add that was not mentioned already. I will say that almost any Watch repair person can work on both equally. Both are good durable movements. Though some will say that ETA parts are about the easiest to come by in the case of 2824-x movements. Both will give great service. Vance.
 
Save
Reply Quote Like Like
#27 ·
dfwcowboy said:
Two different things really. There's a good chance your cars engine will work for 50,000 miles if not significantly more without changing the oil. That doesn't mean you shouldn't have it serviced more often. Manufacturer's service recommendations are often based on the shelf life of the lubrication oils used, which is generally 4-5 years. Beyond this the oil will start to degrade and moving parts could potentially incur more wear and tear than they would otherwise. I ran a Rolex for 16 years without having it serviced and it still was working after that. When I finally had it serviced several components had to be replaced.
Click to expand...
To add to this, given its price, the Miyota 9000 is considered by most to be a throw-away movement. It costs less to replace it with new than to service it. This fact also encourages the mindset of running much longer service intervals, or as I call it, the "run it into the ground" approach.

I've also heard that parts for the Miyota also aren't quite as available because most just replace the movement rather than service and replace worn parts.
 
#29 ·
MX793 said:
To add to this, given its price, the Miyota 9000 is considered by most to be a throw-away movement. It costs less to replace it with new than to service it. This fact also encourages the mindset of running much longer service intervals, or as I call it, the "run it into the ground" approach.

I've also heard that parts for the Miyota also aren't quite as available because most just replace the movement rather than service and replace worn parts.
Click to expand...
The wholesale price of a standard grade 2824 is far less than a servicing so pretty much the same thing there. You can also replace it with a 2824 clone as cheap or cheaper than a Miyota 9 series.
 
#30 ·
dfwcowboy said:
The wholesale price of a standard grade 2824 is far less than a servicing so pretty much the same thing there. You can also replace it with a 2824 clone as cheap or cheaper than a Miyota 9 series.
Click to expand...
True, and I don't doubt that many official service centers for brands using the 2824 simply replace rather than service. At least for lesser grades.
 
#31 ·
Just got my first ever Miyota 9015 powered watch, so far after 4 days of wear approx. 16 hrs. per day, semi active, some desk sitting and some moving around activities, it hasn't stopped running. It's averaging +10/spd, well within spec., hoping it will slow done a little over time. I have a timegrapher so I might open it up and adjust if necessary but I'll give several weeks of wear before I do that.

 
#34 ·
I agree with the people above when they talk about the 9015 handwinding, it’s gritty but you aren’t handwinding it to full PR, just to get it started
The only time I notice the unidirectional rotor whir is when I’m deliberately trying to make the rotor spin that way
 
#35 ·
dirtvictim said:
Exactly, on the 9015 the free spinning rotor is doing nothing but making noise it only winds in one direction. The eta winds in both directions so if the rotor on a 2824 is free spinning then likely the reversing wheels need service.
Click to expand...
If so, how does it do automatic winding? So this movement ends up manual wind?
 
#36 ·
Triton9 said:
If so, how does it do automatic winding? So this movement ends up manual wind?
Click to expand...
When the rotor spins counter clockwise, it winds the movement. Because it's winding the spring, there's resistance, so it won't spin more than a couple of times if you give it a little wrist flick in that direction.

When the rotor spins clockwise, it does not wind the spring. It just free spins with very little resistance. Flick it in this direction and the rotor just spins and spins.
 
#37 ·
As we all know, the number of jewels matter. lol, not.

I’ll take a Miyota 9xxx over a 2824 any day.
 
  • Like
Reactions: craigmorin4555
Save
Reply Quote Like Like
#39 ·
toddies68 said:
I have a Halios Tropic with a Miyota movement and it keeps better time than any of my other watches, I'd be surprised if it gains of loses a second a month
Click to expand...
Oh dear, wait for someone to pull out their best about how it wobbles. Heard it 1000 times when there's nothing left to complain about. After that, they'll start quoting some "expert" and telling us all we're stupid, even though we have 100x the experience and actually know what we're talking about.

Wait for it. 3,2,1….
 
Save
Reply Quote Like Like
#40 ·
I have several watches with Miyota 9015s, several with with ETA 2824-2, and several with the 21,600 NH35-35 movements, and the most accurate seem to the regulated 9015s, some of which are near 0, though there is representation of all movements in that zone. What I will say is that the beat error on the ETAs tend to be lower than the 9015s, leaving a nearly straight track on my watchmeter app, compared with the other two. ETAs seem to have a finer, smoother, winding mechanism, but TBH, it's likely better to avoid winding any automatic watch unless one really needs to. YMMV. I have not had issues with any of these movements.
 
21 - 40 of 49 Posts
About this Discussion
48 Replies
29 Participants
Last post:
martyloveswatches
WatchUSeek Watch Forums
posts
24M
members
618K
Since
2005
A forum community dedicated to watch owners and enthusiasts. Come join the discussion about watch collections, displays, watch winders, accessories, classifieds, and more! We welcome all manufacturers including Casio G-Shock, OMEGA, Rolex, Breitling, Rolex and Tudor, Seiko, Grand Seiko and others.
Full Forum Listing
Explore Our Forums
Public Forum Watches - Private Sellers and Sponsors Affordable watches Dive watches Casio G-Shock