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Defective Dayan ZhanChi 3x3x3 cube

CarlBrannen

Member
Joined
May 6, 2012
Messages
367
Location
Pullman, WA
WCA
2013BRAN01
So I was happy to see a black Dayan ZhanChi arrive in the mail today from speedsolving.com I tore the package open. The white face was very difficult to turn. Difficult as in requiring strength. WTF?

I took it apart and found the problem. One of the screws was out of spec, it's head was too wide and was snug against the plastic center cubie. This might have been noticed at the factory because it was sufficiently hard to turn the screw that I slightly damaged it as you can see in this photo (defective screw on the left). On the other hand, I suppose they use power equipment to screw these things together:
BadScrew.jpg

That was easy to fix. I had a couple packages of spare Dayan screws and swapped it out. (Interestingly, the Dayan ZhanChi uses a different spring from the GuHong. I'm tempted to measure these and see exactly what the difference is.)

Now that I had it apart, I discovered another defect. Two of the edge cubies were missing their torpedoes:
NoTorps.jpg

WTF?

Anyone else get these kinds of problems?
 

theZcuber

Premium Member
Joined
May 8, 2011
Messages
2,076
Location
Central NY, US
WCA
2012PRAT02
I actually just had this. The yellow side of my ZhanChi is messed up, and am getting replacement parts from theCubicle with the rest of the order. One edge was missing a torpedo, and the screw went up against the center (although I think it's the center, not the screw)
 

CarlBrannen

Member
Joined
May 6, 2012
Messages
367
Location
Pullman, WA
WCA
2013BRAN01
I think that if your screw rubs against your plastic (which was the problem I had), you need to replace (or modify) your screw if it's bent or too big, or maybe your spider. It shouldn't do that. No amount of lube is enough to fix broken geometry.
 

CarlBrannen

Member
Joined
May 6, 2012
Messages
367
Location
Pullman, WA
WCA
2013BRAN01
I love working on stuff and have all the tools I need. As to the torpedoes, I ordered three more from GreatSKU which should arrive tomorrow or the next day. I was going to wait to see how many torpedoes were missing from that group, and then take care of them all.

The only reason I'd ordered the one (defective) cube photographed above was because I realized I could get it faster than the Great SKU (cheaper) could arrive from China.
 

CarlBrannen

Member
Joined
May 6, 2012
Messages
367
Location
Pullman, WA
WCA
2013BRAN01
The three Great SKU Zhanchis arrived today and each is in perfect condition. Interestingly, the tensions were wildly different among them. So now I guess I need two torpedoes. That said, I've never seen stickers fall off this fast. I went ahead and ordered a set of torpedoes.
 
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