RB0805 Datasheet, PDF (9/14 Pages) List of Unclassifed Manufacturers – Absorbing impact and noise

Series RB
Specific Product Precautions 1
Be sure to read before handling.
Refer to front matters 42 and 43 for Safety Instructions.
Selection
Danger
1. Energy absorption
Select a model so that the aggregated energy of impact object should
not exceed the maximum absorption energy. Otherwise, it could cause
changes in properties or result in damaging the shock absorber.
2. Corresponding mass of impacting object
Make a model selection, so that the corresponding mass of impacting
object does not exceed the allowable range. Pulsation will occur in buffer
and deceleration force, thus making it difficult to absorb shock smoothly.
3. Collision speed
Use it in the conditions that collision speed is within the specified range.
It could cause the changes in buffer characteristics or lead to damage a
shock absorber.
Caution
6. Drag characteristics
In general, the values of drag (reactive force generated during operation)
generated by the operating speed will vary in hydraulic shock absorber.
And then, by adopting “Porous orifice construction”, the RB series can
adapt to such this fast/slow speed and can absorb shock smoothly in a
wide range of speed.
But, the speed reduction (speed reduction G) would be larger around the
stroke terminal, depending upon the operating conditions. Please note
that it might be encountered that stroke time is long, motion is not
smooth, etc. If this would be a problem, we recommend that stroke
amount should be restricted by using our optional component like
“Stopper nut”, etc.
Warning
1. Static load
Design the system, so that any other forces than the buffer capacity or
impacts should not be applied to the piston rod which is stopped at the
retracted state.
Caution
1. Maximum operating frequency
Design the system in the conditions under which it is not used at the
frequency exceeding the specified maximum operating frequency. (But,
the maximum operating frequency will vary depending on the absorbed
energy.)
2. Stroke
The maximum absorption energy in the specifications cannot be exerted
unless the full stroke is used for both Series RB and RBL.
3. Work surface of an impact object
The contact surface of the impact object with which the piston rod comes
into contact must be highly rigid.
In the case without a cap, a high surface compression load is applied to
the contact surface of the impact body with which the piston rod comes
into contact. Therefore, the contact surface must be highly rigid
(hardness of HRC35 or more).
4. Be aware of the return force of the impact object.
If used in a conveyor drive, after the shock absorber has absorbed
energy, it could be pushed back by the spring that is built-in. For the
spring force in the specifications, refer to the column (page 1677).
5. Selection of size
As the number of operation proceeds, the maximum absorption energy
of shock absorbers will be decreased by the following reasons such as
abrasion, or deterioration, etc. of the internal working fluid. Taking this
into consideration, selecting a size which is 20 to 40% affordable against
the amount of absorption energy is recommended.
Operating Environment
Danger
1. Operation in an environment which requires explosion-proof
• When mounting in places where static electricity is accumulated,
implement a distribution of electrical energy by grounding.
• Do not use the materials for buffer face which might cause to spark by
collision.
Warning
1. Pressure
Do not use it in the vacuum state, which is substantially different from
the atmospheric pressure (above sea level) and in the atmosphere under
being pressurized.
2. Using inside a clean room
RB
Do not use the shock absorber in a clean room, as it could contaminate
the clean room.
Caution
1. Temperature range
Do not use it, exceeding the specified allowable temperature range. Seal
could be softened or hardened or worn out, or leading to leak a working
fluid, deterioration, or impact characteristic changes.
2. Deterioration by atmosphere
Do not use the product in an environment where the product may be
damaged by salt or air which contains organic solvent, phosphoester
operating oil, sulfurous acid gas, chlorine gas or other acids. It may
deteriorate seals or corrode metals.
3. Deterioration by ozone
Do not use it under the direct sunlight on the beach, or by the mercury
lamp, or the ozone generator, because the rubber material will be
deteriorated by ozone.
4. Cutting oil, water, blown dust
Do not use the product under the condition, where the liquid such as
cutting oil, water, solvent, etc. is exposed either directly or in atomized
form to the piston rod, or where blown dust could be adhered around the
piston rod. This could cause malfunction.
D-„
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Individual
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1681