I keep stripping wheels?!

They don't use lockrings/don't skid

I can't work out the physics of how you strip the lockring thread. If you try to skid and the cog starts to rotate backwards then it will start to tighten the lockring (anti-clockwise rotation of a reverse-thread), but it will just tighten onto the face of the cog. Two possibilities that I can think of are that you (i) are over-tightening the lockring and/or (ii) are using a weirdly skinny cog so that the lockring, when tightened, starts to strips the threads on the hub before it meets the face of the cog.

Have you been using the same lock ring across all of these hubs? And does it have the correct thread for the hubs you are using?

It sounds like your lock ring could have come loose, creating some play in the cog's thread. Anyway, how about considering this from Halo;
http://www.halowheels.com/product/rear-fix-g-track-hubs/

Relatively inexpensive compared to going high-end and discovering your Forsterman-like powerz still strip everything you look at.

Edit; like @PhilDAS said

Repost

My bad

Its good, my poor humour comes across even worse when written

If you don't tighten the sprocket on enough, then no matter how tight you do the lockring eventually the sprocket will unscrew slightly and it's that bit of room that causes the threads to strip. When you lock up and it turns slightly before grabbing, that's what takes the thread off. I've done it a couple of times.

@ShutUpBlud a good quality lockring like a Dura Ace will help stop it happening in future, but as others have said the only real solution is to use a bolt on sprocket instead.
http://www.velosolo.co.uk/shopdisc.html

@furious_tiles made a good point though. Elite track riders power output is 2000 watts +, AFAIK they ride with threaded hubs?

Only ever pedaling forwards, no lockring needed.

Yeh, with no lock rings and no skidding! It's the lock ring thread that's stripping, not the cog thread. -edit dammit phildas got in there again

It is weird tho. The only time I've had problems with a lock ring was when I was using a very old one, that was quite skinny too. No matter how tight it went on eventually it'd come loose. It's a horrid feeling when ur back pedaling is unwinding the cog!

I've always made sure to use the right lockring for the hub

The sprocket is always on right. I rode it around for a while to make sure it's right, and carry around a chain whip, so that I can tighten the lockring when I know that the sprocket is firmly screwed on

TLdr;

Hub looks cheap. Maybe invest in some better gear?

I don't have that much power - track racers don't strip their threads because they don't skid about. They usually don't even use lockrings. All I'm saying about power is that 92kg of rider is already 900+ Newtons of skidding force, before factoring in leg power - so I may have more skidding force, just because I'm a pretty big (but not remarkably big) guy

Fair. The question was more like - "I keep destroying cheap hubs, will expensive ones protect me, or just be a more expensive mistake". The one I'm the picture is a Novatec hub.

One way to find out.

But no seriously, just buy a pre-adapted bolt on hub and sprocket from velo solo and get it built into a wheel. They're only £60, about what you would pay for a formula hub anyway.
http://www.velosolo.co.uk/shophub.html

Well I'm now selling my Vigorelli to get some new hubs. Hopefully they will be the last I buy for a while

I'm a pretty big (but not unremarkably big) guy

Did you mean 'not remarkably big'?

I don't think a bolt on hub/cog system is necessary. Just use decent components and put them on properly, like not tightening a cog on with your fucking fingers and then riding it.

As in, I'm a pretty big guy, but it's not as if I'm huge, or an absolute giant of a man

Yeah true, that was a silly idea. I mean, I did use a chain whip/lockring tool immediately afterwards

The sprocket is always on right. I rode it around for a while to make sure it's right,

This is not how you fit a cog. Jus' sayin'.

I mean that I fit it, then I ride the bike, without skidding it, to get the cog on tight - but if that is wrong, then by all means do tell me