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Old July 28th, 2018, 11:33 PM   #16
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Re: Vinten magic friction fluid

It seems there are two systems provided by Vinten, one referred to as "thin film" and another as "low friction". Beyond those definitions I have little idea as to the difference. Vinten's prmotoion suggests a very wide temperature range the heads will operate in. That may be why their proprietary fluid is special.

As for the base of the Vinten 22, it operates fine so I had no reason to look inside it and maybe introduce faults which are not yet there. Given it sits flat most of its life, there is probably less likelyhood of fluid leaking away.
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Old July 31st, 2018, 03:16 AM   #17
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Re: Vinten magic friction fluid

Hi all, im still here and able to answer your questions. Yes, Vinten make two drag systems; LF and TF.

LF is our oldest drag system, it means Lubricated Friction and basically works like a drum brake filled with Vinten fluid #3. The fluid eliminates the stiction that you'd get from a brake and provides a permanent film of fluid between the two friction surfaces. Unlike a drum brake, the "brake lining" is a rubberised material that provides resistance to movement along with the remaining fluid. I can tell you from experience, the mix that Vinten uses took years to refine. Other mixes either introduced stiction or reduced the drag range.

TF means Thin Film. What we have is a stack of adjustable plated steel shims with spacers between them that provide a void for the drag fluid. As the head moves, this fluid is sheared which creates resistance. The adjustment increases or decreases the void and thus controls the resistance to movement rather like walking through water, the deeper you get, the more water you move and the harder it gets to walk.

There, hope that helps.

By the way, if you are looking for spares for any of our brands, you can get them from our on-line shop which youll find here https://partsstore.vitecparts.com/

All the best
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Old July 31st, 2018, 04:15 AM   #18
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Re: Vinten magic friction fluid

Thanks Peter. Good to have you back.

What about SD? Why was it short lived?
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Old August 1st, 2018, 01:44 AM   #19
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Re: Vinten magic friction fluid

Morning.

The SD drag was a brilliant innovation combining both fluid shear in the drag module and slip from the outer rings, but it was expensive to make both in terms of time and materials, so we brought in TF.
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