Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 170mm and 250mm give 4 controllable stop positions across a 420mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1170 mm
- Stroke 2250 mm
- Total travel420 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S
The SCT50X170X250S tandem cylinder delivers four discrete rod positions from a single compact assembly: 0 mm (fully retracted), 170 mm, 250 mm, and the total travel of 420 mm. 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, providing robust mid-range thrust for multi-stop linear tasks.
A built-in magnet is standard on this -S variant, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke or intermediate position sensing. The cylinder uses a 20 mm diameter piston rod, M16x1.5 rod-end threads, and PT1/4 ports, with a 21 mm adjustable air cushion in each section to manage deceleration smoothly across the 170 mm and 250 mm strokes.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 170 / 250 mm |
| Total travel | 420 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) | 170 mm |
| P2 (section 2) | 250 mm |
| P3 (both extended) | 420 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 SCT50X170X250S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×170 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT50X170X250S Is Used
Two-Depth Sorting Gate
Use the 170 mm and 250 mm positions to divert packages or parts onto three separate conveyor lanes, with the 420 mm total travel clearing a reject chute.
Multi-Stop Feeding
Advance material in three controlled steps—170 mm, 250 mm, and 420 mm—for a stamping or punching line that requires different feed lengths per cycle.
Staggered Clamping Station
Apply a 170 mm pre-clamp travel followed by a 250 mm high-pressure clamping stroke, with the full 420 mm extension used for part ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X250S the Right Cylinder?
Choosing the SCT50X170X250S provides four fixed stopping points without the complexity of two separate cylinders and external hard stops. The 50 mm bore suits general automation; if your application needs a lighter frame, the 40 mm bore offers 628 N push per section, while stepping up to a 63 mm bore provides 1559 N. For replacement, match the 50 mm bore, both 170 mm and 250 mm strokes, PT port thread, and the integrated magnet (-S suffix).
With the longer 250 mm stroke section, consider external guiding or a rod-alignment coupler if the load is not perfectly axial, as side forces can accelerate rod bearing and seal wear on extended reaches.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 170 + 250 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 SCT50X170X250S FAQ
This tandem cylinder provides four distinct rod positions: 0 mm (retracted), 170 mm (first section extended), 250 mm (second section extended), and 420 mm (both sections extended). You select the position by pressurizing the appropriate combination of the two piston sections.
Yes, it is a direct replacement for setups using two 50 mm bore SC cylinders to achieve three or four fixed positions, provided the strokes match 170 mm and 250 mm. The SCT integrates both strokes into one tie-rod body, reducing mounting points and alignment complexity. Ensure your replacement unit matches the PT port thread and the -S magnet option if sensors are used.
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