YSRWJ
Stop element
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Deutschland
+49 711 347-0
www.festo.com
Operating instructions
8158274
2021-09b
[8158276]
Translation of the original instructions
© 2021 all rights reserved to Festo SE & Co. KG
1
Applicable Documents
All available documents for the product
2
Safety
2.1
Safety instructions
–
Only use the product in its original condition without unauthorised modifica-
tions.
–
Observe the identifications on the product.
–
Store the product in a cool, dry environment protected from UV and corrosion.
Keep storage times short.
–
Before working on the product, switch off the power supply and secure it
against being switched on again.
2.2
Intended use
The product is intended for use in cushioning the force of linear moving masses in
an axial direction.
The product is not suitable for rotary drives and for use in damp environments.
2.3
Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can eval-
uate the work and detect dangers. Personnel must have the relevant mechanical
training.
3
Additional information
–
Contact the regional Festo contact if you have technical problems
–
Accessories and spare parts
4
Product overview
4.1
Product design
1
3
4
9
5
6
7
8
2
Fig. 1: Product design
1
Shock absorber
2
Spanner flat
3
Nut for securing the shock
absorber
4
Slot for proximity switch
(optional)
5
Rubber buffer (YSRWJ-7/8 only)
6
Stop plunger
7
Male thread for mounting and
positioning
8
Lock nut (2x)
9
Cross-hole nut for precision posi-
tion adjustment
4.2
Function
Insertion force F2 acting on the limit plunger moves the piston rod of the hydraulic
shock absorber through the cushioning length s to the end position.
When the piston rod is retracted, the hydraulic fluid in the shock absorber flows
through a path-dependent flow control valve and cushions the motion.
If the insertion force is less than the reset force F1 of the internal compression
spring, the stop plunger returns to the initial position.
F1
Reset force
F2
Insertion force
s
Stroke/cushioning distance
Tab. 1: Function
The ring magnet is located on the stop plunger. The magnet enables end-position
sensing by an optional proximity switch.
10
1
Fig. 2: Internal product design
1
Shock absorber
10
Ring magnet
5
Mounting product
Mounting options:
–
in through-hole
–
in through thread
Mounting in drilled hole
Lock nut mounting, at both ends
The lock nuts must not protrude beyond the threaded area.
Tab. 2: Mounting in drilled hole
1. Insert the product up to the intended stop position.
When positioning, observe the maximum dimension x.
2. Secure the product with lock nuts. Tighten the lock nuts to the tightening
torque.
Mounting in thread
Lock nut mounting on one side
The lock nut must not protrude beyond the
threaded area.
The mounting surface must not protrude beyond
the thread area.
Tab. 3: Mounting in thread
1. Screw in the product up to the intended stop position.
When positioning, observe the maximum dimension x.
2. Tighten the lock nut to the tightening torque.
Size
5
7
8
Dimension x
[mm]
£
15
£
20
£
20
Lock nut
Tightening torque
[Nm]
2
3
5
Tolerance ± 20%
Tab. 4: Dimension x and tightening torques
