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Tutorial

Lubrication of R2R tape recorders

By EloMCBo on 01/14/2023 - (Intermediate)
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Teac A-3440

Analog Multitrack from Teac

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-beginning of writing 26/11/2022-

The lubrication of tape recorders is a seemingly simple subject, but if you want to extend the life of the devices and space out maintenance, you have to choose the right oil or grease. Tis tutorial ia a translation of a French version under review. In a first step I will use google to translate

The oils

The easiest way is to choose the oil recommended by the manufacturer (in yellow), which is very expensive and may only be suitable for certain models/brands. In addition, different oils are needed depending on the part to be lubricated.
Browsing through a few forums and doing some research, I've compiled the info in the following table.

Personally (in green) for the capstans, I use a motor oil of medium viscosity but very stable in temperature, much less expensive, I use a motor oil of very high viscosity index. For the various wheels and wheels as well as for the levers, a fairly fluid hydraulic oil. It's up to you to see if it suits your device and the materials (ferrous metals, Cu and alloys, plastics) that make it up.

It is essential to clean off all traces of the old lubricant which may not be of the same nature and which may not be compatible with the new one; we can for example put in excess to "drive out" the old lubricant and then remove the excess.

Reference
Viscosity 40°
[mm²/s]
Viscosity 100°
[mm²/s]
Viscosity index
ASTM 2270
Reference, type
Used by
sensitivity T°
ISO VG10 10 * * SINGER
-H sewing machine-
AL Sew-1-2/00 13 3.2 121
TS619 18 4 120
AZOLLA ZS 22 4.4 102 hydraulic ISO 22
AZOLLA ZS 32 5.4 102 hydraulic ISO 32
AZOLLA ZS 46 6.8 100 hydraulic ISO 46
AZOLLA ZS 68 8.7 100 hydraulic ISO 68
ISOFLEX PDP 65 68 16 251.6 STUDER, REVOX, NAGRA
ANDREOL 456 34 7.9 228 NAKAMICHI OTARI
KANTO KASEI  Floil
sintered bearing
* * 230 SONY
AMPEX 087-579
[Mobile DTE 25]
[44.5]
[6.9]
[98]
OTARI MX-5050
2s 4s 2sd 4sd
[hydraulic ISO 46]
ESSO Teresso 43
[Mobil DTE 24]
[31.5] [5.3]
[98]
Revox A36
[hydraulic ISO 32]
CASTROL heavy duty ATF 36 (34) 7.2 (7.7) 175 (210) -automatic transmission-
MOBIL ATF SHC 33 7.4 200
MOBIL ATF 320 35 7.7 201
MOBIL 10W20 44.8 8.7 173 -engine-
MOBIL 10W30 56 10.3 175 -engine-
CASTROL EDGE 0W30 72 12.3 170 -engine-
CASTROL EDGE 0W40 76 12.8 171 -engine-
MANNOL Hypoid GL 80W/90 159.6 16.3 107 compatible with Cu and alloys
MOTOREX gear oil hypoid SAE 80W/90 141.9 15.1 107 compatible with Cu and alloys
PAG 100 100 19
212
-climatiser-
ok R134A et R1234yf
not compatible with other types
XENUM XPG 5W50 109 17.7 180
SPHERETECH GREEN OIL SAE 5W-50
(10W60)
94.5
18.2
213
-engine-
29€/L 11/2022
compatible same grade
LIQUI MOLY
168
24
175
-engine-
CASTROL Edge 10W-60
160
22.7
173
-engine-

Note: equivalent reference and values in [brackets] I could find

example of viscosity variation as a function of viscosity index

Tableau indice viscosite

Grease (to come)

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