Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 115mm and 256mm give 4 controllable stop positions across a 371mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1115 mm
- Stroke 2256 mm
- Total travel371 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S
The SCT50X115X256S is a double-acting tandem cylinder that delivers four fixed rod positions—0 mm (retracted), 115 mm, 256 mm, and 371 mm (total travel)—by pressurising its two piston sections independently or together. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa, with a 20 mm piston rod and M16x1.5 rod thread.
A built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing at each stop. The cylinder body has a 243 mm base length (A dimension) and uses PT1/4 ports with a 21 mm adjustable air cushion at each end to decelerate the load smoothly.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 115 / 256 mm |
| Total travel | 371 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) | 115 mm |
| P2 (section 2) | 256 mm |
| P3 (both extended) | 371 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 SCT50X115X256S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×115 | Stroke 1 (section 1) in mm. |
| ×256 | 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 SCT50X115X256S Is Used
Multi-Stop Diverter Gate
Actuate a diverter gate on a conveyor to four distinct positions—retracted, two intermediate angles, and fully extended—routing packages to four separate lanes with a single compact cylinder.
Two-Depth Pressing Station
Control a press platen to stop at a shallow pre-press depth (115 mm), a deeper forming depth (256 mm), and full ejection (371 mm), all with repeatable pneumatic positioning.
Staged Material Feeding
Index a material strip or component tray through three advance lengths in sequence, using the 115 mm and 256 mm strokes to feed, pause for an operation, and feed again before retracting.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X115X256S the Right Cylinder?
This 4-position configuration is ideal when a process needs two intermediate stops plus full extension without the complexity of two separate cylinders and external hard stops. The unequal strokes (115 mm and 256 mm) create distinct, repeatable positions for sorting or multi-depth pressing. If your load requires more force, stepping up to the 63 mm bore provides 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 50 mm bore, both strokes (115 mm and 256 mm), PT port thread, basic mounting, and the -S magnet option; an SCT without the magnet suffix will lack the sensor mounting capability. With the 256 mm stroke section extended, consider external guides if the rod is subjected to significant side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 115 + 256 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 SCT50X115X256S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 115 mm (section 1 extended), 256 mm (section 2 extended), and 371 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurising the appropriate cylinder ports.
Yes. The -S suffix indicates a built-in magnet, making the SCT50X115X256S directly compatible with AirTAC CMSG, DMSG, and EMSG series sensors. These clamp onto the tie-rod barrel to detect piston position at each stop without additional brackets.
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