Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 175mm and 520mm give 4 controllable stop positions across a 695mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1175 mm
- Stroke 2520 mm
- Total travel695 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S
The SCT50X175X520S is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 175 mm, 520 mm, and the total travel of 695 mm. Each 50 mm bore section delivers 982 N of push force at 0.5 MPa, making it suitable for material handling tasks that require two distinct extended stops without complex servo controls. The 20 mm diameter rod and 21 mm adjustable air cushion at each end ensure smooth deceleration across the combined stroke.
This model includes a built-in magnet (suffix -S), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The second stroke of 520 mm is a non-standard, made-to-order length, extending the cylinder's reach beyond the standard 500 mm limit. The body length A(SCT) is 243 mm, and the operating range is -20 to +70 °C with the default TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 175 / 520 mm |
| Total travel | 695 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). This configuration exceeds the 500 mm standard section stroke, so it is a non-standard / made-to-order build. 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) | 175 mm |
| P2 (section 2) | 520 mm |
| P3 (both extended) | 695 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 SCT50X175X520S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×175 | Stroke 1 (section 1) in mm. |
| ×520 | 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 SCT50X175X520S Is Used
Two-Stage Diverter Gate
Operates a conveyor diverter with a partial-open position at 175 mm for sorting small items and a full-open position at 695 mm for large packages, all from one compact cylinder.
Multi-Depth Clamping Fixture
Provides a 175 mm stroke for initial part contact and a 520 mm stroke for a secondary, deeper clamping position on a welding jig, eliminating manual fixture adjustments.
Sequential Part Ejection
Ejects parts from a die in two stages: a short 175 mm push to break the part free, followed by a full 695 mm extension to clear the tooling area for robotic pick-and-place.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X175X520S the Right Cylinder?
Choose the SCT when your application needs two separate, repeatable stop positions from a single pneumatic circuit, avoiding the cost and complexity of two independent cylinders and their mounting hardware. For this 50 mm bore, the 175 mm and 520 mm stroke combination creates a unique four-position sequence. If higher force is required, stepping up to the 63 mm bore (SCT63) provides 1559 N of push per section at 0.5 MPa. A direct replacement must match the 50 mm bore, both the 175 mm and 520 mm strokes, the PT port thread, and the built-in magnet.
Given the long 520 mm section stroke, consider the potential for side loading and rod deflection, especially when the rod is fully extended to 695 mm. Using external guide rods or a linear rail is recommended to protect the rod bearings and ensure reliable cycling in non-axial load scenarios.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 175 + 520 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 SCT50X175X520S FAQ
This cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 175 mm (first section extended), 520 mm (second section extended), and 695 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is a direct replacement for setups using two 50 mm bore cylinders to achieve two fixed extension points. A compatible replacement must match the 50 mm bore, the exact 175 mm and 520 mm stroke combination, the PT port thread, and the integrated magnet for sensor mounting.
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