70/140H-8 Series (2310KB) - TAIYO

Standard built-in high-performance cushion 70/140H-8 series
Enhanced cushioning effect to keep up with high-speed machines.
Identical mounting dimensions to those of 70/140H-7 series that are
field-proven for long years (conform to JIS standards)
Enhanced cushioning function has reduced
shocks occurring when actuator stops.
Acceleration during deceleration
(G-value)
G-value after inrush into cushion (inrush speed 400 mm/s)
1.5
1.0
0.5
0
0.5
Inrush into cushion
AX211 (2-wire, 2-LED type)
The red LED (detecting range),
and the green LED (optimum position) light up.
AX101 (2-wire)
The indicator lamp can be easily
seen from rear side as well
as from front side.
Conventional
product
Time
70/140H-8
● The adoption of switches common to other series permits the substantial
reduction of the kinds of maintenance switches.
● The lighting status of the switch can be checked with wide range.
■ Range of bore applicable to 70/140H-8R with switch
Single Rod
Double Rod
Rod A Rod B Rod C
φ40~φ125 φ32~φ140 φ40~φ140
φ32~φ140 φ40~φ140
❇ The rod A with switch has been standardized.
❇ The rods B and C of a φ140 bore have been standardized.
Cushion ring
● The optimization of the groove profile
has improved cushioning performance
(compared with 70/140H-7).
● The cushion ring with the U-shape groove
which features little change in the
performance of the cushion stroke
regardless of fluctuation in oil temperature.
Cushion valve
● The improved structure that the cushion valve
is hard to come off even when the screws
are excessively slackened at adjustment for
more reliable security.
● The structure that is convenient for speed fine
tuning during the cushion stroke
● Added gaskets made of fluoric rubber
(as well as the check plug)
Time required for cushion stroke
against cushion valve speed
Cushion stroke time
1.4
1.2
1.0
0.8
0.6
0.4
Conventional
product
0.2
0
0 1/2 1 1 1/2
Cushion valve opening
70/140H-8
●Standard built-in high-performance cushion
●Products conforming to JIS standards
(with mounting dimensions identical to those of 70/140H-7 series)
Succeeded features of 70/140H-7
Applicable to highly frequent use
To meet requests for the highly frequent use under
high loads, the rods B and C have been
specialized, and the weary strength of the piston
rods has been improved.
Simple structure
●Common switches
●Enhanced safety countermeasures
The bush part and bush holder of the rod C type
have been discontinued with production. The
bush, of which structure has been simplified, has
been specialized in the rod C.
Easier disassembly and assembly
The housing shape of the cylinder tube and cover
seal part has been modified for easier disassembly
and assembly.
Improved sealing performance
of air vent plug
The sealing of the air vent part (also used as the
check plug) has been changed to the canned
hydrogenated nitrile rubber for more reliable
sealing after air vent.
Improved durability
Superior abrasion-proof copper alloy is adopted as
bush material to improve the bush durability.