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frictionless arm post


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#1 Nicolas Rome

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Posted 05 March 2005 - 09:40 AM

I am starting the production of a frictionless arm post for 3a arm!!
I have been using it myself for four years and have never had any problem.
I notice that when I let operators try some are skeptical because they are used to the stiffness of the normel arm post but if you have ever tried the pro arm, which has this feature built in it, maybe you understand what I mean. I myself never work without it because it absorbs even more the horizontal body movement and gives you the possibility to move much smoother around your sled , specialy during switching, or when shooting in tight situations where it also gives you the possibility to tuck in your arm those 5-10 cm you need to get through a doorway ecc...
It is fully an bearings with no friction point between the arm and the post!
For price or other information please contact me:
Tel: 0039 329 6232504
E-mail : nicoridillo@yahoo.com
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#2 PeterAbraham

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Posted 07 April 2005 - 10:48 PM

Yeah. A highly appealing idea. Here's how you do it:

1. Purchase the flat washer-covered Needle Bearing shown in the link here. ( Reference to part number 2489K5 ). $ 7.00 per unit.

2. Make sure you buy one that is 5/8 inch ID and at least 1 inch OD.

3. Purchase two of these Split Collars from this site. Make sure it also has an ID of 5/8 inch.

4. Clamp the split collar on your IIIA Arm Post, just where it enters the arm end. Just BELOW the split collar, place the needle bearing.

5. Make sure your arm post is long enough that it sticks out the bottom of the arm a bit. Attach the second split collar on the bottom, to insure that it cannot come out the top easily. There you go !!! A foolproof way to have a frictionless IIIA Arm Post for about Ten Dollars US.

:)

Peter Abraham
New York
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#3 Mikko Wilson

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Posted 08 April 2005 - 03:00 AM

Hmm..

*If* Nicolas has an original buisness idea, you just kinda blew it out of the water Peter.


- Mikko.
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#4 RobVanGelder

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Posted 08 April 2005 - 05:01 AM

It isn´t such a new idea....... perhaps?

Also the Progear arm has this standard, build in, and there are times that I use it and times that I block the bearing.

What Peter means here is that this has been tried and tested in different versions, for different arms and posts and if someone wants to make it available as a (not too expensive) add-on, pleaso do so. It´s not a new idea though!
and I doubt if it can make any serious money!

:)
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#5 Charles Papert

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Posted 08 April 2005 - 05:09 AM

I don't know if I am in the minority, but I tend to swap out different length arm posts depending on the shot...I have four different lengths readily at hand from 6" to 18" (the fearsome "manmaker"), as well as two kinds of J/F bracket. With the PRO arm, the changeover is mere seconds. I'd hate to have to remove collars for this sort of operation (and incidentally, I like my armposts fully free to rotate; a lot of guys have this frictioned-off on their PRO arms)
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#6 Eric Fletcher S.O.C.

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Posted 08 April 2005 - 08:03 AM

I don't know if I am in the minority, but I tend to swap out different length arm posts depending on the shot...I have four different lengths readily at hand from 6" to 18" (the fearsome "manmaker"), as well as two kinds of J/F bracket. With the PRO arm, the changeover is mere seconds. I'd hate to have to remove collars for this sort of operation (and incidentally, I like my armposts fully free to rotate; a lot of guys have this frictioned-off on their PRO arms)

<{POST_SNAPBACK}>


I totally agree with Chazz here, I swap out arm post all the time sometimes between takes if need be.

To go thru all that, well for lack of a better word "crap" to do it as suggested by Peter makes it impractical and I'm not willing to give that ability of the PRO arm up
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#7 Benjamin Treplin

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Posted 08 April 2005 - 11:08 AM

Here we go again. Place your bets.
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#8 BJMcDonnell SOC

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Posted 08 April 2005 - 11:11 AM

Having the option to have the frictionless or add a little friction is great. I too use the different size posts and I enjoy the ability to swap them out fast. I have the rig engineering arm and it has the bearings built in like the Pro arm.

BJ McDonnell
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#9 PeterAbraham

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Posted 09 April 2005 - 02:56 PM

Cool. I had no idea that the GPI arm came with this as a feature without added bits and parts. Obviously the whole idea only applies to other arms that don't have this feature ! Eric, I wasn't hardly suggesting that anyone give up an arm they own, use and adore. Just a comment on someone else's post, is all..........

:)

Peter
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#10 bobgilles

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Posted 09 April 2005 - 10:00 PM

I have a MS arm and a PRO sled, I had George Paddock make me a Delrin adapter and it added a cool amount of play so I tried PTFE/Teflon tape (used commonly on the masts of small racings sailboats, "Lasers"), works killer. I think all Ops get used to a certain bit of resistance in the post axis, I like being able to fine tune it, I really like plain Delrin tubes the best.

http://www.biscor.co...k3datasheet.htm
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#11 thomas-english

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Posted 10 April 2005 - 12:23 PM

I, likewise have a progear, frictionless head.

I have never locked my one off for a shot.... In what circumstances do you do this?

Thomas
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#12 JobScholtze

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Posted 10 April 2005 - 01:12 PM

Here we go again. Place your bets.

<{POST_SNAPBACK}>


:D LOL
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#13 RobVanGelder

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Posted 10 April 2005 - 08:58 PM

Thomas, without the friction the arm swings out to a position that is the natural balance for it, with the given load and of course affected by the position of your body/socketblock.
Sometimes, with doors for instance, it might be handy to have it more closer to your body, which is not the balanced position but creates a smaller profile.
One time, in order to get through a narrow hallway, I had to swing the gimbal to the opposite side of what is normal, and in doing so I moved the arm in front of my body without extending the rig away from me, then a bit of friction or even a complete lock of the gimbal/post is very helpful.
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#14 PeterAbraham

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Posted 11 April 2005 - 05:01 AM

Here we go again. Place your bets.

<{POST_SNAPBACK}>


Please explain?

It'd be a nifty thing to be able to dial in the armpost friction, wouldn't it? I prefer little to none, opposed to a sticky armpost any day !
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#15 thomas-english

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Posted 11 April 2005 - 05:22 AM

That s cool, Im going to try that. I have always muscled my way through that. In fact I feel I am often muscling the arm around, Ill tighten it up next week and see if that makes me more zen.
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