Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 55mm and 245mm give 4 controllable stop positions across a 300mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 155 mm
- Stroke 2245 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245
The SCT50X55X245 tandem cylinder provides four fixed rod positions by combining two piston sections on a single axis. The stops are precisely located at 0 mm (fully retracted), 55 mm, 245 mm, and the full 300 mm total travel, giving your automation distinct intermediate points without external hard stops or complex servo controls.
Each 50 mm bore section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the 0.9 MPa maximum operating pressure. The unit uses a 20 mm diameter piston rod with M16x1.5 threads and PT1/4 ports, and its tie-rod body has an A(SCT) length of 243 mm plus the combined stroke, with a 21 mm adjustable air cushion on each section for controlled end-of-stroke deceleration.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 55 / 245 mm |
| Total travel | 300 mm |
| Stop positions | 4 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, 21 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.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 55 mm |
| P2 (section 2) | 245 mm |
| P3 (both extended) | 300 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.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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.
Model Code: Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×55 | Stroke 1 (section 1) in mm. |
| ×245 | 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.
Where the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 Is Used
3-Way Diverter Gate
Use the 0, 55, and 300 mm positions to direct product flow to a bypass, a reject chute, and the main line, all from one compact actuator.
Two-Stage Clamping
Advance to the 245 mm stop for a low-force pre-clamp, then pressurize both sections to reach the full 300 mm stroke for final high-force clamping.
Multi-Depth Pressing
Achieve two distinct pressing depths at 55 mm and 245 mm in a single cycle, eliminating the need for a tool change or a secondary press station.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 the Right Cylinder?
This four-position configuration is ideal when a process needs two intermediate stops between home and full extension, such as a diverter gate with a partial-open bypass. Compared to using two separate cylinders and sequencing their valves, the SCT tandem design guarantees the relative positions are mechanically fixed, simplifying your pneumatic circuit and eliminating timing drift. If your load requires higher thrust, stepping up to the 63 mm bore SCT offers 1559 N push per section at the same 0.5 MPa pressure.
For direct replacement, match the 50 mm bore, the exact 55 mm and 245 mm section strokes, and the standard PT port thread. This basic configuration has no mounting brackets, so verify your machine's existing mounting interface. Since the combined stroke reaches 300 mm, evaluate your application for side-loading on the 20 mm rod; a guided toolplate or external linear rail is recommended if the load is not perfectly axial.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 55 + 245 mm suit your layout?
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Plumb the two sections to the correct valves for each stop.
- check Adjust end cushion screws for smooth stops.
- check Use SCT mounting accessory (FA / FB / CA / CB / LB).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X245 FAQ
This cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 55 mm (first section extended), 245 mm (second section extended), and 300 mm (both sections extended, total travel). The positions are fixed by the two stroke lengths and cannot be adjusted without changing the cylinder.
Each of the two 50 mm bore sections independently produces 982 N of push force at 0.5 MPa and 825 N on the pull stroke. The force does not double when both sections are pressurized; you get the single-section force value at any stop position, as the sections act on the same rod line.
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