Stopper cylinders Series ST
Single and double-acting, magnetic, non-rotating
Sizes 20, 32, 40, 50 mm
Sizes 20, 32, 40, 50 mm
The Series ST Stopper cylinders are pneumatic actuators with rod, complying with UNITOP and ISO 21287 standards, where rod and bushing have been specifically enlarged to ensure high resistance to radial loads and shocks.
These cylinders are available in two versions, double-acting and single-acting, and with rear spring.
The non-rotating rod version is also available.
These cylinders are available in two versions, double-acting and single-acting, and with rear spring.
The non-rotating rod version is also available.
The detection of the piston position is enabled by means of proximity switches (Mod. CST or CSH) which are mounted in slots along three sides of the cylinder profile.
It is possible to cover the slots with a proper profile (Mod. S-CST-500).
The high resistance to shocks and radial loads and the easy mounting makes Series ST particularly suitable for use in transport/conveyor lines where it is required to stop the transit of workpieces and workpiece-holder pallets.
General Data
| Construction | profile with self-tapping screws |
| Cylinder design | compact based on UNITOP and ISO 21287 standards |
| Operation | double-acting, single-acting rear spring, double-acting rear spring |
| Sizes | 20, 32, 40 (Mod. ST32 only), 50 mm |
| Strokes min. max | 5 ÷ 30 mm (see the table of standard strokes) |
| Rod versions | without thread, with female thread, non-rotating, non-rotating with feemale thread, non-rotating with roller |
| Non-rotating function | with technopolymer anti-friction ring |
| Fixing and mounting | direct with holes on the end-caps, in any position |
| Cushioning | mechanical end-stroke shock absorbers in rubber |
| Max frequency | 5 Hz (Ø 20, 32, 40 mm) – 3 Hz (Ø 50 mm) |
| Working temperature | 0°C ÷ 80°C (with dry air -20°C) |
| Storage temperature | -20°C ÷ 100°C |
| Working pressure | 1 ÷ 10 bar (double-acting) – 2 ÷ 10 bar (single-acting) |
| Max rotation play | ± 4° (Ø 20, 32 e 40 mm) – ± 3° (Ø50 mm) |
| Max. torque (for non-rotating version) | 1,5 Nm (Ø20 mm) – 2,5 Nm (Ø 32 e 40 mm) – 3,5 Nm (Ø50 mm) |
| Medium | filtered air in class 7.8.4 according to ISO 8573-1 standard |
| Lubrification | Not required. The cylinder is pre-lubricated. If lubricated air is used, it is recommended to use oil ISOVG32. Once applied the lubrication should never be interrupted. |
| Use with external sensors | slots on the three sides for proximity switches Mod. CST and CSH |
Coding Example
| ST | 31 | 2 | A | 050 | A | 030 |
| ST | SERIES | |
| 31 | CONSTRUCTION STANDARD 31 = UNITOP 32 = ISO 21287 | |
| 2 | OPERATION 2 = double-acting 4 = single-acting, rear spring 9 = double-acting, rear spring | PNEUMATIC SYMBOLS CD08 / CD25 / CD21 CS08 / CS19 / CS15 CS17 / CS20 / CS16 |
| A | DESIGN A = standard R = non-rotating (for Mod. ST32 only) | |
| 050 | BORE 020 = 20 mm 032 = 32 mm 040 = 40 mm (for Mod. ST32 only) 050 = 50 mm | |
| A | CONSTRUCTION A = standard R = with roller (for non-rotating version only) F = with female thread (for Mod. ST32 only) | |
| 030 | STROKE (see the table) | |
| VERSION = standard ( _ _ _ ) = extended piston rod _ _ _ mm |
