Rotary Attachment - Irregular vs. Regular?

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Doug Fisher
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Rotary Attachment - Irregular vs. Regular?

Post by Doug Fisher » Sat Dec 31, 2016 11:03 am

I am looking at buying a rotary attachment for my laser and have pretty much decided on a chuck type design. I have seen some models that are listed as "irregular" which I have been led to believe can better handle irregular shaped items. Can someone please explain how this type varies from a regular style? My search of the forum and the internet didn't provide an answer. Looking at the pictures, I can't readily see a difference but I may not know what to examine. They all show three chuck designs in their listings.

Any tips, advice or other words of warning for buying a rotary attachment would be appreciated!

Thanks!
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Keith Sherwin
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Re: Rotary Attachment - Irregular vs. Regular?

Post by Keith Sherwin » Sat Dec 31, 2016 11:14 am

Doug,
A 3 jaw chuck style can grasp an item inside and outside depending on the item.

The small roller style is not so great for items like cups with handles.

The style that Gene has made (but yet to get going) and that Dustin & I are in the process of making will do cups with handles (irregular) as well as cylinders. It will not grab on the inside though. This style is relatively inexpensive to make vs purchase of the other two styles. http://rdworkslab.com/viewtopic.php?f=12&t=93
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Doug Fisher
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Re: Rotary Attachment - Irregular vs. Regular?

Post by Doug Fisher » Sat Dec 31, 2016 12:10 pm

So, what does one look for to see the difference between a regular 3 chuck and an irregular? The picture with a red "1" in the upper left is a regular. The other is an irregular. I am not spotting the difference.

Is there any disadvantage to buying the irregular?

Thanks!
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3jawreg.JPG
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80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
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Keith Sherwin
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Re: Rotary Attachment - Irregular vs. Regular?

Post by Keith Sherwin » Sat Dec 31, 2016 12:20 pm

Have to agree with you, they both look the same. So if that is the style you prefer then go for it.
What is the definition of irregular?
To me, a cup with a handle is irregular, as the handle can be in many places and takes away from being round or regular shape overall.
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fred ungewitter
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Re: Rotary Attachment - Irregular vs. Regular?

Post by fred ungewitter » Sat Dec 31, 2016 12:34 pm

This would be a WAG, generally speaking, but consider that most 3 jaw chucks tighten the jaws uniformly. What if an irregular 3 jaw chuck allowed one to tighten each jaw independently? 4 jaw chucks are usually constructed in this manner. I popped out a quick search to The Google and found that a 3 jaw independent chuck is rare but they do exist. Unless the price is unusually high, I would also suspect that the term irregular may apply to factory seconds, scratch and dent, blemish items.
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Re: Rotary Attachment - Irregular vs. Regular?

Post by Doug Fisher » Sat Dec 31, 2016 1:04 pm

One person suggested the difference was 4 vs. 3 jaw chuck. I haven't seen any of the irregulars have four chucks during my search though.

Another person implied the difference is more a marketing term that is not clearly applied by sellers but that the distinction is an irregular rotary attachment is a chuck type and a regular is the flat square frame with "hot dog" roller bars/tubes like Russ has for his blue and white machine. I am starting to think he is correct because I have never seen one listed as irregular be of the hot dog roller type like Russ owns.

As we all learned during our initial laser purchases, you can't assume anything with the adverts for lasers and their accessories, so when I saw this distinction in some of the ads it made me wonder. Not trying to complicate this decision but would rather not make a mistake and have buyer's remorse later. Hopefully this thread will help others with the decision process when they spot the terms during their search.
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
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Re: Rotary Attachment - Irregular vs. Regular?

Post by Willy Ivy » Sat Dec 31, 2016 2:07 pm

Doug
I have been trying to decide the same thing and run into the exact problem, which one?
I have two of the hot dog rotary's which is what I use to do stainless tumblers, round and tapered objects on, but would like to buy or trade for a different style to be able to do things with handles and weird bases.
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