Nexen Rod Locks 966195 - Manual (Page 6)

6 FORM NO. L-21222-E-1211
NOTE
Nexen pneumatically actuated devices require clean, pressure regulated air for maximum performance and life.
All seals in Nexen pneumatically operated devices are lubricated for life, and do not require additional lubrication.
However, some customers prefer to use an air line lubricator, which injects oil into the pressurized air, forcing
an oil mist into the air chamber. This is acceptable, but care must be taken to ensure once an air mist lubrication
system is used, it is continually used over the life of the product as the oil mist may wash free the factory
installed lubrication.
Locate the lubricator above and within ten feet of the product, and use low viscosity oil such as SAE-10.
Synthetic lubricants are not recommended.
Nexen product’s bearings are shielded and pre-lubricated, and require no further lubrication.
LUBRICATOR DRIP RATE SETTINGS
ROD MATERIAL
• Nexen strongly recommends the following rod material
for cylinder rods and guide rods. Deviations from these
specifications will result in poor rod lock performance
and shaft damage.
Hardness Specification Hard Chrome
Plating Thickness
Less than 52 HRC 20 microns
[0.0008 inch]
Greater than 52 HRC 8-3 microns
[0.0003- 0.0005 inch]
•
The diameter should lie in the h8 tolerance range.
Reference: USAS B4.1 - 1967(1974)
ISO 286-1 - 1988
ISO 286-2 - 1988
• The rod must be clean and dry to maintain optimum
holding forces.
• The surface roughness Rmax should be 1.6 microns
[63 micro-inch] or better.
• The rated holding force corresponds to static load
conditions. If the rated value is exceeded, slippage may
occur. Operating dynamic forces must not exceed the
static holding force.
CAUTION
Nexen’s Static Rod Lock is suitable for infrequent
dynamic braking (emergency stops) when used
with hardened shaft material Repeated dynamic
stops may cause rod and/or collar wear, reducing
holding forces.
1. Close and disconnect the air line from the unit.
2. Turn the Lubricator Adjustment Knob counterclockwise
three complete turns.
3. Open the air line.
4. Close the air line to the unit when a drop of oil forms
in the Lubricator Sight Gage.
5. Connect the air line to the unit.
6. Turn the Lubricator Adjustment Knob clockwise until
closed.
7. Turn the Lubricator Adjustment Knob counterclockwise
one-third turn.
8. Open the air line to the unit.
LUBRICATION
CAUTION
These settings are for Nexen supplied
lubricators. If you are not using a Nexen
lubricator, calibration must follow the
manufacturer's suggested procedure.