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Studer A807 Lubrication?

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Studer A807 Lubrication?

Postby Fantashable » Wed Jun 27, 2012 3:40 pm

HR has mentioned in the past about applying a little light machine oil to some mechanical parts of Tape Machines.
Furthermore, my Studer operators handbook specifically mentions the word 'grease'.

I am presuming here that light machine oil and grease are not the same. So which type of 'grease' is correct here?

Hope Hugh or another Studer owner may shed light on this for me, please.

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Re: Studer A807 Lubrication?

Postby Hugh Robjohns » Thu Jun 28, 2012 9:44 am

No, they are very different things and intended for very different applications.

What makes you think the machine is in need of grease?

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Re: Studer A807 Lubrication?

Postby Fantashable » Fri Jun 29, 2012 9:00 am

Hugh Robjohns wrote:

What makes you think the machine is in need of grease?

hugh

Hello Hugh, thank you for your response.

The operators manual mentions grease ambiguously at least once. Your query, however, prompts me to rethink and review this notion.

Light machine oil: sewing machine lubricant? or is that likely to be too light?

With Thanks,

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Re: Studer A807 Lubrication?

Postby ef37a » Tue Jul 03, 2012 6:14 am

I serviced domestic tape machines for 20 years and never had to lubricate them in any way. Indeed, very often my task was to DE-GREASE a machine that a customer had treated to the ubiquitous 3in1!

When you think of all the motors in all domestic electricals, hair dryers,MW ovens,cooling fans, fan heaters plus all the motorized kit in cars, these are lubricated "for life" and that means decades.

What fans especially DO need is a periodic clean up.

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Re: Studer A807 Lubrication?

Postby Fantashable » Wed Jul 04, 2012 8:25 am

ef37a wrote:I serviced domestic tape machines for 20 years and never had to lubricate them in any way. Indeed, very often my task was to DE-GREASE a machine that a customer had treated to the ubiquitous 3in1!


Thanks for your post.

However, I expect you know, that except perhaps those from Revox (B77HS) and similar high-end hifi products, most domestic tape machines have little in common with professional recorders/reproducers - which are built to reliably withstand the rigours of the working day in busy facilities, with a price tag to match! :)

With that in mind, I'm keen to learn which lubricant is appropriate for my Studer machine.
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Re: Studer A807 Lubrication?

Postby Hugh Robjohns » Wed Jul 04, 2012 10:25 am

Fantashable wrote:With that in mind, I'm keen to learn which lubricant is appropriate for my Studer machine.

As I said, it depends what you are trying to lubricate and why you feel the need. Using the wrong form of lubricant will knacker the motor completely, and if you over-do it you'll get oily leaks making a mess of everything and potentially upsetting the electronics.

The capstan motors of all Studer machines use a sintered bearing which is saturated with lubricant using a vacuum process during manufacture. This is intended to last the entire life of the motor and can not be replaced 'in the field'. Indication of needing re-lubrication includes significantly degraded wow and flutter, failure to maintain steady speed, or siezing up!

Studer's general policy was to return the faulty motor to the factory for refurbishment and install a new replacement, but I have seen service reports that suggest in-field re-oiling is possible for temporary work-arounds. the motors do have a finite life, though, and sooner or later it will need to be replaced.

Most Studer motors have a label on them to say what lubricant is used. The earlier motor designs used a synthetic ester-oil -- Isoflex PDP65 synthetic oil -- re-oiling can be achieved by applying a few drops -- and only a few drops -- to the felt ring around the top of the capstan motor shaft (under a plastic cap).

The later 'liquid grease' versions should have a red label on the bottom. I'm pretty sure the A807 uses the later generation of motors which are lubricated with liquid grease in the form of Constant GLY2100. Getting at the capstan motor in an A807 requires removal of the headblock, after which you can remove the plastic dust cap at the top of the motor and apply a few drops of the appropriate liquid grease. Again, don't over do it!

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Re: Studer A807 Lubrication?

Postby Fantashable » Wed Jul 04, 2012 2:03 pm

Hugh Robjohns wrote:
Fantashable wrote:With that in mind, I'm keen to learn which lubricant is appropriate for my Studer machine.

As I said, it depends what you are trying to lubricate and why you feel the need.

hugh

If moving parts in the machine do not require oiling, then all well and good; I'd rather not apply lubricant and instead be guided by your advice.

I have tried to find the entry in my Service Manual which mentions lubrication. As luck would have it I can't find it now !!

However, I have found the part(s) listing for the two different types of Capstan bearing lubricants in the Operators manual. But I'm reluctant to go that route unless I must.

Furthermore, I have a document on my PC (transcribed from your own article in SOS May 1997) from which I quote ...

"Mechanical maintenance of the machine is normally restricted to turning fixed guides, lubricating bearings and linkages,
The mechanical bearings and linkages within a tape machine should be lubricated occasionally, ideally with a light machine oil but, once again, make sure you use the oil sparingly -- a drop will go a very long way"

Brings me back to my question: which light machine oil?

I am still a little uncertain as to oil or not.

With thanks,

Mike.
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Re: Studer A807 Lubrication?

Postby Hugh Robjohns » Wed Jul 04, 2012 3:33 pm

Fantashable wrote:Brings me back to my question: which light machine oil?


The same one they used when they made the machine, or the one the manufacturer recommends!

In general, something like sewing machine oil. NOT 3-in-1 please!

I must admit I've not oiled either of my machines and I don't feel a burning need to do so at the moment.

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Re: Studer A807 Lubrication?

Postby ef37a » Wed Jul 04, 2012 8:48 pm

Fantashable wrote:
ef37a wrote:I serviced domestic tape machines for 20 years and never had to lubricate them in any way. Indeed, very often my task was to DE-GREASE a machine that a customer had treated to the ubiquitous 3in1!

Thanks for your post.

However, I expect you know, that except perhaps those from Revox (B77HS) and similar high-end hifi products, most domestic tape machines have little in common with professional recorders/reproducers - which are built to reliably withstand the rigours of the working day in busy facilities, with a price tag to match! :)

With that in mind, I'm keen to learn which lubricant is appropriate for my Studer machine.
Well, wheels is wheels mate! Then, the higher up the mechanicals food chain you go the less servicing things tend to need. 75k between some Merc' services? I serviced a couple of Ferrographs that were used for editing on a daily basis, Wright and Wear deck (LOVED them Hugh?)but almost always just electronic (valve) problems. Of course "lubricated for life" depends upon the life! The shaded pole motors in autochangers in shoe factories (played records into PA) were in such **** surroundings that they seized about every 3 years. Total strip down and soak over night in meths, dry then soak in (yep!) 3in 1 and good for another 3 or 4. Hoover vacs needed the bearings repacking every ten years or so. Had a special tool that forced in new grease and forced out the old grit and crap. Will a Dyson LAST ten years????
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