luudee Posted November 26, 2018 Share Posted November 26, 2018 I have a Hatari wall mounted fan, (18") in my kitchen. We just replaced it a few months ago. Now, when we run it at high speed (#3). the blades will "explode". Obviously the blades are either not designed for this purpose, or are just poor quality. We have replaced them 3 times in one months ... I'm wondering if anybody else has experienced this, and has a solution for this. Running it a low speed (#1) seems to be ok, but is not acceptable for our usage. luudee Link to comment Share on other sites More sharing options...
Crossy Posted November 26, 2018 Share Posted November 26, 2018 We have six of the same fan, all are behaving perfectly. Are you using genuine Hatari blades or cheap "pattern" ones? I've never seen a fan "explode" from an overspeed blade. Of course that doesn't mean it can't happen, but it seems odd that you've seen it several times with the same fan. Link to comment Share on other sites More sharing options...
Artisi Posted November 26, 2018 Share Posted November 26, 2018 4 minutes ago, Crossy said: We have six of the same fan, all are behaving perfectly. Are you using genuine Hatari blades or cheap "pattern" ones? I've never seen a fan "explode" from an overspeed blade. Of course that doesn't mean it can't happen, but it seems odd that you've seen it several times with the same fan. Agree with Crossy, the speed / centrifugal force is insufficient for a blade to disintegrate unless it has an inherent fault. How does it fail, blades break off the hub, hub breaks. Assume the first failure was an original Hatari fan, have the others failed in the same way? Link to comment Share on other sites More sharing options...
Wirejerker Posted November 26, 2018 Share Posted November 26, 2018 Sounds like the blade is hitting the back cage at high speed and shattering. Check it’s been assembled correctly and the clearances are even.Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
Artisi Posted November 26, 2018 Share Posted November 26, 2018 Just now, Wirejerker said: Sounds like the blade is hitting the back cage at high speed and shattering. Check it’s been assembled correctly and the clearances are even. Sent from my iPad using Tapatalk Had the same thought, but surely the noise would make you immediately aware of what the problem is problem. Link to comment Share on other sites More sharing options...
Crossy Posted November 26, 2018 Share Posted November 26, 2018 Kids, air gun ?? Link to comment Share on other sites More sharing options...
Lamkyong Posted November 26, 2018 Share Posted November 26, 2018 sunds like SONIC BOOM ?? Link to comment Share on other sites More sharing options...
eyecatcher Posted November 26, 2018 Share Posted November 26, 2018 You obviously have a knack for puttting it all together incorrectly every time. Can you do it again, and make a video as a guide to show what can happen if you dont read the instructions. Link to comment Share on other sites More sharing options...
Artisi Posted November 26, 2018 Share Posted November 26, 2018 Reassemble it once again and send photo before it dies again. Link to comment Share on other sites More sharing options...
KittenKong Posted November 27, 2018 Share Posted November 27, 2018 14 hours ago, Crossy said: Kids, air gun ?? Don't tempt me. Link to comment Share on other sites More sharing options...
luudee Posted November 29, 2018 Author Share Posted November 29, 2018 On 11/26/2018 at 5:31 PM, Artisi said: Agree with Crossy, the speed / centrifugal force is insufficient for a blade to disintegrate unless it has an inherent fault. How does it fail, blades break off the hub, hub breaks. Assume the first failure was an original Hatari fan, have the others failed in the same way? Yes, they disintegrate a high speed making the housing fall apart. I *think* we are getting original Hatari blades, but who knows ... It now has happened 3 times in a row, I'll try to find another supplier for our "genuine" Hatari blades, lol Thanks, rudi Link to comment Share on other sites More sharing options...
luudee Posted November 29, 2018 Author Share Posted November 29, 2018 On 11/26/2018 at 5:33 PM, Wirejerker said: Sounds like the blade is hitting the back cage at high speed and shattering. Check it’s been assembled correctly and the clearances are even. Nope, all properly assembled and works for some time without issues. I was in the kitchen when it happened once, it was running just fine, and then all of a sudden ... it's like an explosion ... Thanks, rudi Link to comment Share on other sites More sharing options...
luudee Posted November 29, 2018 Author Share Posted November 29, 2018 On 11/26/2018 at 7:37 PM, Artisi said: Reassemble it once again and send photo before it dies again. Unfortunately the failure time is unpredictable. It will work for some time, and then boom ! rudi Link to comment Share on other sites More sharing options...
Crossy Posted November 29, 2018 Share Posted November 29, 2018 Can you post a photo of a failed blade, could give a clue as to why you are having such bad luck. Link to comment Share on other sites More sharing options...
luudee Posted November 29, 2018 Author Share Posted November 29, 2018 1 minute ago, Crossy said: Can you post a photo of a failed blade, could give a clue as to why you are having such bad luck. Sorry, we threw them all out. They literally disintegrated in to many smaller pieces. When running at low speed, we don't have that issue, only on high speed. So I assume they just disintegrate due to poor quality. rudi Link to comment Share on other sites More sharing options...
xylophone Posted November 29, 2018 Share Posted November 29, 2018 Just a thought here...…...is someone cleaning the blades (or spraying them) with some sort of "cleaning spray"?? Link to comment Share on other sites More sharing options...
luudee Posted November 29, 2018 Author Share Posted November 29, 2018 1 minute ago, xylophone said: Just a thought here...…...is someone cleaning the blades (or spraying them) with some sort of "cleaning spray"?? No time for them to get dirty, they typically disintegrate before that. But yes, we clean them with just a damp towel, no solvents ... rudi Link to comment Share on other sites More sharing options...
Daffy D Posted November 29, 2018 Share Posted November 29, 2018 Genuine Hatari fan blades are marked with the Hatari name somewhere inside the hub. Most blades usually show small lines of cracks where the blade joins the hub before they explode. But Who knows...……………………. As Crossy says a picture would be useful. Link to comment Share on other sites More sharing options...
Artisi Posted November 29, 2018 Share Posted November 29, 2018 Is there excessive end float in the motor bearings causing the fan to move at the higher speed and hit into the screens, any sign of this? Link to comment Share on other sites More sharing options...
tutsiwarrior Posted November 29, 2018 Share Posted November 29, 2018 3 hours ago, luudee said: Sorry, we threw them all out. They literally disintegrated in to many smaller pieces. When running at low speed, we don't have that issue, only on high speed. So I assume they just disintegrate due to poor quality. rudi if the problem appears only at high speed sounds like a balancing problem? best to get an OEM replacement properly installed...the motor shaft has a key so that the new blade assembly can only be installed the proper way and the balancing should've been tested at the factory per the usual quality control procedures... Link to comment Share on other sites More sharing options...
Daffy D Posted November 30, 2018 Share Posted November 30, 2018 I had a problem when replacing fan blade with non Hatari. The blades were unbalanced and it shook the whole fan almost off the wall at speed. The OP does not mention the fan shaking just the blades "exploding" at high speed so doubt its a balance problem. Be interesting to find out what the problem is. Link to comment Share on other sites More sharing options...
I wonder Posted December 3, 2018 Share Posted December 3, 2018 On 11/29/2018 at 4:51 PM, luudee said: Sorry, we threw them all out. They literally disintegrated in to many smaller pieces. When running at low speed, we don't have that issue, only on high speed. So I assume they just disintegrate due to poor quality. rudi My wife being typically Thai bought relplacement fan blades outside of Tesco Lotus because they were 10THB cheaper then the ones inside. The original Hatari blew apart when I picked the fan up by its handle while it was running so house rules changed at that point. When the new cheap replacement required a clean I noticed what looked like fracture lines around the hub but figured it was ok. However some time later it disintegrated at the hub without being moved around or interfered with. I bought the expensive???? Hatari 16" replacement fan blades from Big C and paid the addition 10THB making it 69THB and the casting appeared much cleaner, it also runs quieter so maybe some places are selling cheaper rejects. Link to comment Share on other sites More sharing options...
luudee Posted December 4, 2018 Author Share Posted December 4, 2018 I replaced my fan again, this time I ordered online, and I think the new one is a real Hatari fan. Attached are the pictures from the previous "authentic" Hatari fan, even says so on it ... The new one appears to be a much better quality plastic ... "appears to be" ... You can see how the old one is starting to fall apart already, two weeks at the lowest speed. rudi Link to comment Share on other sites More sharing options...
petermik Posted December 4, 2018 Share Posted December 4, 2018 You have a ghost living in your house............ Link to comment Share on other sites More sharing options...
tutsiwarrior Posted December 4, 2018 Share Posted December 4, 2018 gangsters are now peddling fake, knock off hatari fan blades... Link to comment Share on other sites More sharing options...
luudee Posted December 4, 2018 Author Share Posted December 4, 2018 2 hours ago, petermik said: You have a ghost living in your house............ Pssst ... don't tell everybody ???? Link to comment Share on other sites More sharing options...
Moonlover Posted December 4, 2018 Share Posted December 4, 2018 On 11/26/2018 at 5:13 PM, luudee said: I have a Hatari wall mounted fan, (18") in my kitchen. We just replaced it a few months ago. Now, when we run it at high speed (#3). the blades will "explode". Obviously the blades are either not designed for this purpose, or are just poor quality. We have replaced them 3 times in one months ... I'm wondering if anybody else has experienced this, and has a solution for this. Running it a low speed (#1) seems to be ok, but is not acceptable for our usage. We've run 2 Harari 18'' fans for many years, often at high speed. We've only had one blade failure in that time. The fact that your unit is very new, only a few months you say, would strongly suggest a fault with the unit. a slight misbalance at low speed would be tolerable, but at high speed the vibration would eventually cause 'fatigue failure' in the blades. They usually crack at the base. Wall mounted units also need to be very firmly attached to avoid vibration. Link to comment Share on other sites More sharing options...
Artisi Posted December 4, 2018 Share Posted December 4, 2018 8 hours ago, luudee said: I replaced my fan again, this time I ordered online, and I think the new one is a real Hatari fan. Attached are the pictures from the previous "authentic" Hatari fan, even says so on it ... The new one appears to be a much better quality plastic ... "appears to be" ... You can see how the old one is starting to fall apart already, two weeks at the lowest speed. rudi appears to be typical fatigue failure brought about by blade flexion / oscillation, probably the blades are not true aerofoil shape and suffer unequal loading across the blade. Link to comment Share on other sites More sharing options...
kkerry Posted December 4, 2018 Share Posted December 4, 2018 too tight or not tight enough... or not slotted correctly on to the metal pins... We have six Hatari fans, wall and pedestal, the oldest one about twenty years old. Never needed to replace any parts, just take apart and clean about every six weeks. Link to comment Share on other sites More sharing options...
fruitman Posted December 8, 2018 Share Posted December 8, 2018 I hate Hatari fans, you need Mitsubishi's they are much better. But yours had non-original fanblades i guess or the cage was bent/dented? I've also seen a fanblade brake off while the fan was running, it was in a restaurant in Krabi and very scary. Lucky they used the cage... Buy a mitsubishi and it will make much less noise and work much longer....also clean them every few months..I just cleaned my mitsu's and noticed the motor of the dirty one was getting pretty warm because it couldn't cool properly from all the collected dirt in the heart of the cage. It's very silent again now and running all days long (we have many of those in the house), but unfortunately there are no ceilingfans from Mitsu. Link to comment Share on other sites More sharing options...
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