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10-12-2017 #1
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12-12-2017 #2
When I looked around aliexpress was best value.. sometimes you can find a deal on ebay aswell! Have you checked the prices on uk sites? If you compare its much cheaper to pay £200 for shipping.
I think I added about 30 to get everything shipped in a wood box to eliminate freight damages
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12-12-2017 #3
zappautomation was my first choice but they are £300 each, i have found cnc4you at £160 each so not too bad and with aliexpress it would be nice if could or multiple and save on postage but postage seems to double
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12-12-2017 #4
Hi Reefy,
I think that some traders on Aliexpress keep the price low and the postage high for two reasons 1 it keeps the customs declared value down, so you pay less import charges and VAT and 2 it keeps the refundable amount low if you return goods that are not faulty.
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12-12-2017 #5
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12-12-2017 #6
If you order screws, spindle, VFD etc. at the same time it will mean you only pay delivery once.
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12-12-2017 #7
HI, thats how to rectify something, if you mess things up and weld too fast
I am joking, just tack all in place, rectify with a mallet and then weld. But things like that happen, when i am in a hurry.
you can evaluate the option of buying chinese Hiwin type rails. last time i had great success, But the key is to buy from somewhere you know its not crap, hence directly from the manufacturer. Problem is , i said it somewhere, in China they sale linear rails at every corner shop.
I bought 10m of MGN12 from this guys and they were TOP quality, hardened rails and the carriages were good and sliding well https://es.aliexpress.com/store/grou...66f4a665DnQrsc
All you risk is eventually changing the balls of a bearing block that does not slide well. But usually it will be because is just dirty.
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12-12-2017 #8
Last edited by reefy86; 12-12-2017 at 05:35 PM.
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12-12-2017 #9
Will i notice anything from a c5 ballscrew to a c7? also will i be losing any benefits if i go with 2525 screws and use a belt ratio to bring it down to 2510 spec? reason i ask is because the 2525 are on offer but they are c7's and its only £140 for 3000mm lengths where as a 2510 only do c5's but they are £400 each
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12-12-2017 #10
C5 has better tolerance that C7.
IIRC C7 is usually just rolled, whereas C5 is generally ground. I'm sure a google search will turn up a chart with the various tolerances.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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