
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X270X270S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 270mm and 270mm give 3 controllable stop positions across a 540mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
The SCT63X270X270S is a double-acting tandem cylinder that delivers three fixed rod positions from two 270 mm stroke sections: fully retracted (0 mm), mid-stop (270 mm), and full extension (540 mm). Each piston section provides 1559 N of push force at 0.5 MPa, rising to 2805 N at 0.9 MPa, driven through a rigid 20 mm diameter rod.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The 63 mm bore body has an A-length of 249 mm and uses a 28 mm adjustable air cushion on each section to decelerate the load smoothly. It is a genuine AirTAC multi-position actuator, ready for integration into sorting or diverting stations.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X270X270S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 270 / 270 mm |
| Total travel | 540 mm |
| Stop positions | 3 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke / section | Up to 500 mm standard |
Specifications follow the official AirTAC SCT (multi-position) datasheet. SCT is available in bores 32–100; each of the two sections has a 500 mm max standard stroke (800 mm max). Confirm against the product label before installation. Thread options: PT (standard) / G.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 270 mm |
| P2 (both extended) | 540 mm |
Positions are set by pressurising section 1, section 2, or both. With equal strokes you get 3 distinct positions; with unequal strokes you get 4.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Force is per actuated piston section (single-piston, same as the SC bore): push uses the full bore area, pull subtracts the rod area. Size with a safety margin.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×270 | Stroke 1 (section 1) in mm. |
| ×270 | Stroke 2 (section 2) in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCD (double rod), SCJ (adjustable stroke). SCT mounting: Basic, FA, FB, CA, CB, LB. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Use the three discrete positions (0, 270, 540 mm) to direct product flow to one of two lanes from a single infeed, with the retracted position acting as a neutral or third lane.
Act as a programmable hard stop on a conveyor line. The 270 mm and 540 mm extensions can define two different product lengths or stopping points for a palletising operation.
Achieve two distinct pressing depths in a single cycle. The first section extends 270 mm for a pre-form operation, and the second section adds another 270 mm for the final form, all with sensor confirmation.
Choose the SCT63X270X270S when your process requires a three-position linear move with sensor feedback at each stop. This tandem cylinder is more compact and cost-effective than linking two separate SC63 cylinders with external bracketry, and it guarantees the relative spacing between the 270 mm and 540 mm positions. If you need higher force, step up to the SCT80 series, which provides 2513 N of push per section at the same 0.5 MPa pressure. For a direct replacement, match the 63 mm bore, both 270 mm strokes, PT port thread, and the built-in magnet (-S suffix). With a 270 mm stroke per section, ensure the rod is guided if the load applies significant side force to prevent bending.
Multi-position checklist
It provides 3 distinct mechanical stops because both stroke sections are equal at 270 mm. The positions are 0 mm (fully retracted), 270 mm (one section extended), and 540 mm (both sections extended).
Yes, if you need fixed 270 mm and 540 mm stops. The SCT63X270X270S is a direct tandem replacement that eliminates the need for external couplings and alignment. Ensure the replacement has the same 63 mm bore, PT ports, and the -S magnet option if you are using sensors.
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