Best pull out security on the market - CoroChuck™ 930 by Sandvik Coromant
Vložit
- čas přidán 21. 03. 2013
- Need a hydraulic chuck that won't let you down? Look no further than the new CoroChuck 930. This new generation of hydraulic chucks can rightly claim the best pull-out security on the market, designed to eliminate vibration and ensure the highest precision for milling and drilling applications.
- Věda a technologie
We even confirmed the tests with several chucks of the same kind to make sure it wasn't just a coincidence or a single faulty product we bought. I totally agree that in the end you always have to do trials in order to determine which chuck will be best for the application in question.
Best regards,
Ruben Kiefer - Product Manager
Wonderful video
pulling out is never secure if you know what i mean.
exactly what I was thinking
Thank you for your input. Of course another possibility to machine with secured pull out is to use Plura with iLock, a.k.a. Safe-Lock system, if you are a convinced Shrink Fit user and have all the heat equipment that is required for that.
Best regards,
Ruben Kiefer - Product Manager
Thank you for your comments. I think it wouldn't be very wise to manipulate test results since anybody can AND WILL test them in the end. What I mean is that one cannot really make a product better than it is in our metal cutting business because eventually end users will find out anyway...
Answer continued in the next posting.
The spindle effect is measuring how much of the total torque moment (Nm) of a rotating spindle is being used. Often spindles have two different spindle effects given, one for long time use and one for short periods. We only showed to spindle effect in order to convince that the end mill is starting to pull out which you can easily see when the Nm spindle moment start to climb upwards...
Answer continues in the next posting.
Pull out happens when the axial pull-out force is bigger than the actual clamping force of the chuck can withstand. The easy solution is to decrease cutting date at the cost of precious productivity. A shrink Fit solution can normally not measure with a hydraulic chuck unless you have an iLock solution to secure from being pulled-out. If you need to know more please contact a local specialist who will gladly help you further with this.
Best regards,
Ruben Kiefer - Product Manager
the pull out force originates from the twist angle of your tool. when you are using end mills the screw form of the tool will cause a force in direction of -Z. a higher or lower pull out force depends on the twist angle, compared with a screw it means a higher or lower pitch of your tool.
hydraulic chucks are pretty easy to handle in front of your machine because you won't need a heating unit. further it often is cheaper when you only need 15 chucks. but when you are going to buy
Good question. We have not tested those yet. Has anybody experience with them?
Best regards,
Ruben Kiefer - Product Manager
Ok, you win. I have to admit that it would be mindless to use such a marketing trick as it would immediately destroy your good reputation :)
200 chucks it should be cheaper to go for shrink chucks (incl. the heating device).
i've never used shrink chucks but many people say that you have less vibrations. on the other hand, as far as i know, certain hydraulic chucks have a higher clamping force.
last but not least: the design of many shrink chucks is smaller than the one of hydraulic chucks. pretty important when you are making dies or other parts where you have not much space for large tool holders.
how do make this cut out (slit cut) and process in manufacturing of tool holder ? if possible explain?
okay, there are some slender hydraulic chucks, but not as many as shrink chucks.
ps: i've often been told, from high to low vibration tendency "collet, hydraulic, shrink chuck" - but have a look at video
LpoJIS9xXVQ
02:00 and
Nn5dciJain0
it also depends on the quality of your chuck and probably a high quality collet chuck (tightened correctl) will beat a low quality shrink chuck.
Copetitor A is a Big chuck.
B & D should be a Schunk (at least their claim is "the original with the three rings")
I doubt my tool pulls out if I tight against the weldon flat.
but Weldon is always off center and tool will worn out faster
I admit it, weldon flat is an old technique not health for the endmills.
Sandvik guys have my respect after I met the silent tools.
why the tools little pull out ? not hold strong enough? it's not happen in real work, but why here like this ?
and Weldon ? 😁..... bad road, expensive, shine, its 2018...
Is there a tool to remove colletts?
Hi! Yes, there are extractors for the different collet sizes. You can order and read more about it here; www.sandvik.coromant.com/en-gb/products/corochuck_930/pages/how-to-use.aspx
Hope it helps!
BUT I think this competitions are, well, okay but marketing. You often don't know if competitors design was intended to be used with the same axial force etc. pp.
I'm not going to claim that Sandvik doesn't tighten the competitors chucks lesser than there own or use their chuck in a dry clamping environment while placing oily tools into the competitors chucks. But there is some kind of uncertainty. The only way that works is trial & error to decided if a chuck fits your needs.
There's also Haimer's Safe-Lock system as you maybe know (at least Sandvik has been licensed by them). I've never used the Safe-Lock system but tight fit combined with force fit should be better than a force fit only chuck.
That's why I think you shouldn't have claimed the pull-out security for the whole market. But I think that's what's called marketing.
Sorry for being a smartass - and of course I still love to use your tools :)
haimer_dot_de/english/safelock.php
Oh gad, BAHAHAHAHAHA!!