AMF
X

Hollow Rod Cylinder with internal thread

single acting, spring return,
max. operating pressure 400 bar.

Order
no.
Article no. push-pull force
at 100 bar
[kN]
push-pull force
at 400 bar
[kN]
Stroke H
[mm]
Vol.
[cm³]
effective piston area
[cm²]
Spring force min.
[N]
Weight
[g]
CAD SC
65318 6920G-20 5,0 20 8 4 4,9 200 1000
63032 6920G-32 8,0 32 10 8 8,0 350 1750
65334 6920G-50 12,5 50 12 15 12,8 540 1700
63073 6920G-80 20,0 80 15 30 20,0 750 3900
65359 6920G-125 32,0 125 20 64 32,8 1120 6400

Design:

Cylinder barrel from steel, burnished. Piston and piston rod case hardened and ground. Built-in return spring. Built-in sintered bronze filter. 2 wipers and vent screw. Oil supply via threaded port.

Application:

Particularly suitable for retrofitting existing fixtures for hydraulic actuation. When workpieces are clamped onto a machine tool table, the hollow rod cylinder can be fitted over the clamp bolt instead of the nut. The hollow rod cylinders can be used for push or pull applications.

Features:

Completely sealed against contamination and chips by means of sinter metal breather and two wipers. Piston can be moved to its end stop. Oil connection at both ends, thus easy lining up in series.

Note:

Cylinder size 20 to 50 are designed for use in combination with tempered bolts, material grade 8.8. For size 80 and 125 bolts of material grade 12.9 must be used.
For single acting cylinders there is risk of sucking in coolant during the return stroke. In this case the cylinders have to be protected against the direct effect of coolant. The built in sinter metal breather should be protected.

  • dimensions table
    Order
    no.
    Article no. Piston
    dia.
    [mm]
    A dia. D
    dia. F K L dia. M
    dia. N R dia. P G x depth S
    65318 6920G-20 32 80 52 40 56,0 90,0 12,5 20 G1/8 27 M12x29 17
    63032 6920G-32 40 90 60 44 60,5 101,5 14,5 24 G1/8 30 M14x30 19
    65334 6920G-50 48 101 70 50 71,5 113,0 16,5 26 G1/8 35 M16x39 22
    63073 6920G-80 60 115 80 60 87,0 132,5 18,5 32 G1/4 38 M18x38 27
    65359 6920G-125 75 149 100 75 108,0 163,0 20,5 38 G1/4 49 M20x47 32