This site uses cookies. Some of these cookies are essential to the operation of the site, while others help to improve your experience by providing insights into how the site is being used. For more information, please see the ProZ.com privacy policy.
Cookie settings
"met wie wij de toekomst niet in wilden"
burgermedegebruik

Glossary entry

Dutch term or phrase:

gebolleerd; gebombeerd

English translation:

crowned

Added to glossary by Michael Beijer
May 30, 2012 15:33
11 yrs ago
4 viewers *
Dutch term

gebolleerd

Dutch to English Tech/Engineering Construction / Civil Engineering conveyor belts
Am I correct in assuming that this can mean 'waisted', or 'hourglass-shaped' in my context?

My context:

'Gebolleerde stuurtrommel:
Gebolleerde Keertrommel :
Gebolleerde Aandrijftrommel :
1x Retourtrommel, gebolleerd
1x Aandrijftrommel, gebolleerd en geruit berubberd'

---------------------------------

See also:

'hourglass drum = tambour en sablier
DEF – (...) waisted drum, narrower in the middle than at the ends, and little longer than it is wide (...)'

(http://www.btb.termiumplus.gc.ca/tpv2alpha/alpha-eng.html?la... )

and:

'Does anyone know how to translate the Dutch word 'gebolleerd' into English?
Apparently it means that a sheet of metal has been curved in some way.'
'A googleing for bolleren and bollering suggests that it is either 'rounded'
(http://www.smidokkum.nl/html/smiprojecten.php) as applied to a rounded end
on a tube or, more commonly, that it is a drum which is curved across its
length so that the circumference at the edge is greater than the
circumference in the middle (like an hourglass shape, only a lot less
dramatic), in order to stop a moving belt from slipping off the drum
(http://www.luctorbelting.com/construc.htm and
http://www.bdldrummotors.com/details_of_options.php?lid=5). The word
'waisted' springs to mind, but I'm not sure if it's right.'

(https://groups.google.com/group/sci.lang.translation/tree/br... )
Proposed translations (English)
5 crowned
4 rounded
References
crowned

Discussion

Barend van Zadelhoff Jun 5, 2012:
@ Johan Interesting.

It would be interesting to know why the company concerned would see 'crowned' as an error. Common sense? :-)

What we don't know about is Michael's company's preference.
If they would prefer 'bulged', or still something else, then you can't say he ended up with the 'correct answer'. :-)

However, he definitely found something that is considered correct at least somewhere and they can't claim he did not research the matter. :-)
Johan Venter Jun 5, 2012:
@ Barend My apologies for not replying sooner, but I only visit this site on occasion and I only noticed your remark now. As we all know translation is not an exact science. I provided the answer as it is listed on a glossary provided by a major producer of various types of conveyor belts and if I would translate gebolleerd as crowned in their documents they would see that as an error. Having said that, I have seen instances in other technical documents where terms are translated differently for different companies, depending on the preference of the company in question.

In this instance Michael came across a term that he did not know how to translate, I provided an answer and even though he did not accept that answer, it seems like it did help him to find the correct answer through a healthy debate by various contributors, so this forum served its purpose, which is what it is all about at the end of the day. It is nice to see the passion you all show for your profession.
Barend van Zadelhoff Jun 2, 2012:
@ Michael

Do it in your own good time.
Thank you for letting me know.
Have a good weekend.
Michael Beijer (asker) Jun 2, 2012:
@Barend Yeah, sorry about that MechaPhysica question Barend. It slipped under my radar. I'll wind it up as soon as I have a spare moment.
Barend van Zadelhoff Jun 2, 2012:
Lianne, don't tell me what I should do, I can decide for myself.
Apart from this, I addressed Michael, not you.

Also, I don't take things personally, I just mention what I think is decent behaviour. And, actually, I am talking here to people just like I am now talking to you.

No hard feelings.
Lianne van de Ven Jun 2, 2012:
Public forum Excellent, Michael.

Barend, please don't go off topic about MechaPhysica - whatever that is - on this post.

And if I did not respond soon enough to your message ("it's a pity your don't respond to the argument"), it was because it was bed time in the US (or maybe I was working). Also: this is a public forum, not a conversation. Please don't take things personally. Our posts will be here forever for everyone to read.

I added an additional link in the reference section about the verb "crowning". See here too, then:
http://www.webconinc.com/Papermaking/crowning.html
Barend van Zadelhoff Jun 2, 2012:
@ Michael I just found your message.

I would say this could be considered as a kind of definite proof that 'crowned' is 'round', or 'round' is 'crowned', after all. :-)
Good thing you found this English file, without it I would not have accepted it and I think for good reasons.

I would like to ask Johan, however

@ Johan, what do you think of this? Could you have a look at these documents as well? And do you think you can still justify using 'rounded'? It can still be right but 'crowned' is perhaps better now that we know this.

@ Michael, another question.

You asked me a question about a translation for 'MechaPhysica'.
I gave you an answer. However, you haven't replied so far.

I don't like it that I am not answered when I am talking to somebody. Especially when I am giving a genuine reply.

As far as I know and as far as I remember I have always responded to people when they talk to me since I have been around here on Kudoz .
In fact, I don't do this only on Kudoz, I am always doing this.

So could you devote a few words to this answer of mine?

Many thanks in advance.
Michael Beijer (asker) Jun 2, 2012:
@Barend I went looking if that last PDF you mentioned exists in English, and it does. In it, they call the 'gebolleerde buis': 'crowned shell length'.

• Dutch: http://www.brammer.nl/Downloads/Interrol_catalogus_trommelmo...
• English: http://www.interroll.com/document_show.cfm/DM_techn_info_80s...

I also made a screenshot with the two side by side for easy comparison: http://wordbook.nl/images/gebolleerde=crowned.jpg
Barend van Zadelhoff Jun 2, 2012:
it's pity you don't respond to the argument
anyhow, basically, you say implicitly if you can show me a 'gebolleerde trommel' I will go for rounded

most likely other examples can be found

but here is at least one
this one is about a very subtle - continuous - curve
good thing they specified the central diameter and the diameters at the sides

several drums are showed with several diameters
just search using 'gebolleerd' in this pdf

you will find for example

central diameter (diameter A) = 81.5 mm
peripheral diameter (diameter B) = 80 mm
you can also see with your own eyes the continuous, in this case at least, very subtle curve (gebolleerd, rounded) of the drum

it can take a few seconds before it appears:

http://www.brammer.nl/Downloads/Interrol_catalogus_trommelmo...
Barend van Zadelhoff Jun 2, 2012:
this is what I mean, if I can show you an image/images of such an object with a continuous curve from side to side, then you would accept that it should, or at least could, be rounded.
Lianne van de Ven Jun 2, 2012:
References Please provide images of the "rounded pulleys" and "gebolleerde trommels".
Barend van Zadelhoff Jun 1, 2012:
@ Lianne I was away from home but just returned

Again, I maintain my point of view

I have looked at the images in your new reference

Not one of them is fully rounded, which is particularly clear if you look at one of them, this one is completely like ^

You have also drums which are rounded from side to side, that have just one continuous curve, I have seen them many times and these are also meant to keep this belt in place and are effective in doing this just as well

in fact the linguistics prove to be helpful in this case as well:

'crowned' appears to be crowned, it is about variants of this ^

so crowned = crowned
and round = round

isn't it beautiful that some things are just as they are and appear in their true colours and don't try deceive us in one way or the other?

:-)
Barend van Zadelhoff Jun 1, 2012:
Unlike Lianne, I maintain my point of view

this is what you find in copheoske's reference:

Whether tapered or trapezoidal, crowned pulleys consist of a drive pulley with a center diameter that is slightly longer than those of the ends

'tapered or trapezoid' is different from 'rounded' (gebolleerd)

if you ask me what do you think 'crowned' refers to then I would rather think of something like this: ^

"a center diameter that is slightly longer than those of the ends" goes obviously for 'rounded' as well

and obviously you have rounded drums as well

I see now Lianne's reference confirms my point of view, not any of the 'crowned' options is rounded from side to side
Barend van Zadelhoff May 31, 2012:
linguistically from a *linguistic* perspective, I prefer 'rounded' to 'bulged'

'bulged' sounds to me 'overstated', 'macho' and 'pathologic' :-)

'rounded' sounds to me 'balanced', 'within limits', 'curved' and 'tender' :-)

'crowned' sounds to me unlikely as well, how can you reconcile 'crowned' with 'gebolleerd, gebombeerd' ??

your reference, Michael: 'tapers' is not necessarily the same as 'rounded' and your first reference doesn't prove anything, at least I don't see it

but as I said, this is from a linguistic point of view
Michael Beijer (asker) May 31, 2012:
some refs for crowned http://chantlandpulley.thomasnet.com/category/heavy-duty-ser...
http://www.maceindustries.co.uk/Conveyor gLOSSARY.html
Johan Venter May 31, 2012:
Not so sure about crowned I am not convinced that crowned is correct as a crown is normally at the end, whihc is not the case here. I think the ref as provided by copheoske is not reliable, but I can be convinced if further refs can be provided.
Michael Beijer (asker) May 31, 2012:
@Johan Thanks for the reference Johan!
It seems then that 'rounded', 'crowned', and 'bulged' are in fact all 3 used to refer to these drums.
freekfluweel May 31, 2012:
convex as opposed to concave
Johan Venter May 31, 2012:
Reference as requested I cannot provide you with more information from my client due to confidentiality requirements on their part, but here is another reference: (on page 34)
http://eriks.nl/documentatie/aandrijftechniek/v-snaren-en-ta...
Michael Beijer (asker) May 31, 2012:
'rounded'? 'rounded', as suggested by Johan seems like it might also be correct, but can someone provide me with a reference where it is used in the meaning of 'Trommels, die in het midden een grotere diameter hebben dan aan de buitenzijde'
Michael Beijer (asker) May 31, 2012:
I think I agree with copheoske. His reference states:

• 'crowned pulleys consist of a drive pulley with a center diameter that is slightly longer than those of the end. The diameter difference causes the belt to correct itself by constantly moving back on its track as soon as it tends to drift away.

(http://ezinearticles.com/?Crown-Conveyor-Pulley---How-it-Wor... )

please see (also in my comment above):

• 'Trommels, die in het midden een grotere diameter hebben dan aan de buitenzijde, (wij noemen dit ‘gebombeerd’) hebben een goed centreringseffect.'

(http://narviflexmedia.be/rubber/Technical/Sturen van transpo... )
---------------------------
My context is the 'trommels' and/or 'rollen' (i.e. the drums/pulleys/rollers) in a conveyor belt. Not as Johan's answer refers to: the belts or trays.
---------------------------
copheoske's reference calls them 'crowned'. Mine calls them 'bulged'.

'gebolleerd' seems to be used synonymously with 'gebombeerd'

=>

(gebolleerd = gebombeerd) = (crowned = bulged)
Michael Beijer (asker) May 30, 2012:
gebombeerd = bulged The 2nd entry for 'bomberen' in the GWIT (Groot Woordenboek Industrie & Techniek) gives the following two English terms: 'dome' + 'bulge'.

I chose 'bulged', and since I am dealing with various 'trommels' (retourtrommel, aandrijftrommel, stuurtrommel etc) arrived at 'bulged drum'.

For a very useful website explaining what a bulged drum is, see: http://www.imepel.com.br/en/produtos/#tambores

'Drums:
These are cylindrical elements with the basic purpose of directing, pull and/or to tension the conveyor belt. The drums may be classified in two major categories: Drive Drum: the drum is connected to the engine designed to transmit the necessary touch to the conveyor belt, and Free Drum: the drum rotates freely due to the traction from its contact with the belt.

We can classify the drums by its Geometric Form

a) **Bulged Drum** – when its external cylindrical surface is presented curved;'
Michael Beijer (asker) May 30, 2012:
gebolleerd = gebombeerd (bomberen) After a little Googling, I discovered that there is also such a things as 'bomberen' (and 'gebombeerd'), and I think this is the same things as my author's 'gebolleerd'.

See e.g.:

'10. BOMBEREN VAN DE TROMMELS

(...)

Trommels, die in het midden een grotere diameter hebben dan aan de buitenzijde, (wij noemen dit ‘gebombeerd’) hebben een goed centreringseffect.'

(http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&... )
Barend van Zadelhoff May 30, 2012:
but of course if 'convex' is what this is about, then it may just as well be called 'rounded', which is closer to the word 'gebolleerd': 'rond gemaakt'

bolleren - rond maken, bolvormig maken, een bolvorm geven
bij uitbreiding: convex maken, concaaf maken, hol maken, bol maken
Barend van Zadelhoff May 30, 2012:
see this discussion about 'gebolleerd', someone racked his brains on it before:

'convex' came to mind because of your description

https://groups.google.com/group/sci.lang.translation/tree/br...

oh, I see you already posted that one :-)

Proposed translations

19 hrs
Selected

crowned

The diameter of a crowned pulley drum is larger at the centre than at the ends. This prevents the belt from slipping off the drum.

Reference:

http://ezinearticles.com/?Crown-Conveyor-Pulley---How-it-Works&id=4826640

Peer comment(s):
disagree Johan Venter : I think you need to read through the context given by the Asker and the discussion entries again.
16 mins
I don't think so.
agree Lianne van de Ven : see reference info
1 day 3 hrs
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "After much deliberation, I think I will choose 'crowned'. Thanks everyone who contributed!"
11 mins

rounded

This is taken from a terminology list I have for a regular client (they produce different types of conveyor belts):

opbolband - rounder belt
Opboller - rounder
opbolschaal - rounder tray
Note from asker:
Thanks Johan! I suppose a 'gebolleerde aandrijftrommel' would be a 'rounded driving drum'...
Peer comment(s):
agree Barend van Zadelhoff : taalkundig gezien, zeg ik ja
39 mins
Thank you
neutral Lianne van de Ven : Am going to change my mind on this one... See reference info
3 hrs
Thank you
disagree copheoske : This is not correct, Johan.
18 hrs
See my comment below
Something went wrong...

Reference comments

1 day 22 hrs
Reference:

crowned

"Crowning" seems to be the correct word to use in the context of shaping pulleys for conveyor belts.

There are currently four types of pulley crowning available.

Straight Face
Straight face pulleys have no crown and are favored by the belt manufacturers. They are recommended for all installations using reduced ply, high modulus, low stretch belts, such as those with a carcass of steel cables or high strength tensile members.

Taper Crown
On taper crown pulleys, the face forms a "V" with the rotating axis larger in diameter in the center of the pulley. This crown is expressed in inches of crown per foot of total face width, by which the diameter at the center of the face exceeds the diameter at the edge. Normal crowns of this type vary from 1/16 to 1/8 inch per foot of total face width.

Trapezoidal Crown
Trapezoidal (Trap) crown pulleys have a flat surface in the middle portion of the pulley face with the ends tapered. Trapezoidal crown pulleys may be appropriate for wider face width pulleys.

Curve Crown
Curve crown pulleys have a long, flat surface in the center of the pulley with the ends curved to a smaller diameter. Except on short pulleys, the curved surface extends in approximately 8 inches from the edge.
http://forum.bulk-online.com/showthread.php?9846-Crowned-Hea...

Belt manufacturers universally cite correct belt tension and crowned pulleys as keys to long belt life and consistent slip-free performance with positive self -tracking.

And: Following the recommendations of the major belt manufacturers, a crowned pulley with a correctly tensioned belt is the preferred way to achieve automatic belt centering. A crowned pulley produces dual lateral opposing belt forces, which balance each other when the belt is centered over the crown.

(and more, including image)
http://www.ptonline.com/articles/how-to-keep-your-conveyor-r...

Image of crowned pulley and v-guide pulley:
http://d2n4wb9orp1vta.cloudfront.net/resources/images/cdn/cm...



--------------------------------------------------
Note added at 1 day22 hrs (2012-06-01 13:54:52 GMT)
--------------------------------------------------

Also, please compare images for "rounded pulley" and "crowned pulley".

--------------------------------------------------
Note added at 2 days3 hrs (2012-06-01 18:58:43 GMT)
--------------------------------------------------

Als deze uitleg van "gebolleerd" (crowned pulley) het niet doet, dan weet ik het niet:
http://woodgears.ca/bandsaw/crowned_pulleys.html

--------------------------------------------------
Note added at 2 days23 hrs (2012-06-02 15:17:10 GMT)
--------------------------------------------------

More on the verb "crowning". Note the "crowning 4" image:
http://www.webconinc.com/Papermaking/crowning.html
Note from asker:
Thanks Lianne, I am now leaning towards 'crowned' myself as well. I concede that linguistically it perhaps is the slightly more counterintuitive of the options, but it seems to be standard terminology for what we are talking about. See this *very* good page with information about crowned pulleys and belt tracking, etc.: >>> http://www.practicalmachinist.com/vb/general/pulley-bulge-crown-dome-belt-tracking-225572/ <<< and this: >>> https://www.google.co.uk/webhp?sourceid=chrome-instant&ie=UTF-8&ion=1#hl=en&gs_nf=1&pq=%22crowned%20pulley%22%20belt%20tracking%20%20conveyor%20belt&cp=47&gs_id=89&xhr=t&q=%22crowned+pulley%22+belt+tracking++%22conveyor+belt%22&pf=p&sclient=psy-ab&site=webhp&oq=%22crowned+pulley%22+belt+tracking++%22conveyor+belt%22&aq=f&aqi=&aql=&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=fbae22d2ac7bc796&ion=1&biw=1280&bih=899 <<< Incidentally, I think 'bulge/bulged' is also used. See e.g. 'Pulley with bulge or crown or dome for belt tracking.' + 'I am looking for design information regarding belt pulleys that have a bulge, crown or dome built into the working face in order to design an...' Although crowned seems to be the standard term.
(a slightly shorter version of the Google search URL I just posted above: http://goo.gl/EI0rB )
Peer comments on this reference comment:
neutral Barend van Zadelhoff : de enige optie die in de buurt van 'rounded' komt, maar het nog lang niet is, is 'curved crown', daarnaast heb je trommels die van zijkant tot zijkant een bol verloop hebben
3 hrs
Zie mijn aanvullende link, Barend.
Something went wrong...
Close search
Term search
  • All of ProZ.com
  • Term search
  • Jobs
  • Forums
  • Multiple search