Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 50mm give 4 controllable stop positions across a 125mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 175 mm
- Stroke 250 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50
The SCT40X75X50 is a tandem multi-position cylinder that delivers four fixed rod positions by combining two independent piston sections on a common rod. With strokes of 75 mm and 50 mm, the achievable stops are 0 mm (fully retracted), 75 mm, 50 mm, and the total travel of 125 mm, giving machine builders precise, repeatable positioning without complex servo controls.
Each 40 mm bore section generates 628 N of push force at 0.5 MPa, rising to 1130 N at 0.9 MPa, driven through a rigid 16 mm diameter rod. The cylinder body has a base length of 235 mm and uses adjustable air cushioning over a 21 mm stroke to decelerate the load quietly. It operates on filtered air at 0.15–1.0 MPa with standard PT1/4 ports.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 75 / 50 mm |
| Total travel | 125 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 75 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 125 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X75X50
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT40X75X50 Is Used
Two-Stage Part Diverting
Uses the 50 mm and 125 mm extended positions to route parts to two different conveyor lanes, with the 75 mm stop acting as a mid-point reject station.
Dual-Depth Pressing
Provides a shallow 50 mm pre-press and a deeper 125 mm final forming stroke, while the 75 mm position can be used for a secondary tooling engagement.
Multi-Stop Feeding
Advances components in three distinct increments (50 mm, 75 mm, 125 mm) into an assembly station, allowing different parts to be presented at varying depths.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X75X50 the Right Cylinder?
Choose the SCT40X75X50 when you need four discrete mechanical stops from a single compact assembly, eliminating the alignment hassle of two separate cylinders with external hard stops. For higher thrust, stepping up to the 50 mm bore SCT50X75X50 provides about 982 N of push per section at 0.5 MPa. If a lower force profile is acceptable, the 32 mm bore SCT32X75X50 delivers 402 N.
This model is a direct replacement for an existing AirTAC SCT40X75X50 with basic mounting, PT ports, and no magnet. When ordering a replacement, match the bore, both strokes (75 mm and 50 mm), and the port thread exactly. For strokes over 300 mm, consider adding external guides to manage side loads and prevent rod bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 50 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 SCT40X75X50 FAQ
It provides four distinct mechanical stop positions: 0 mm (fully retracted), 75 mm (section one extended), 50 mm (section two extended), and 125 mm (both sections extended for total travel). The positions are selected by pressurizing the appropriate cylinder sections.
No, the SCT is a purely pneumatic positioning device. If air pressure is lost or a directional valve centers, the piston can drift or drop. To securely hold a load at a specific stop without live pressure, you must add an external rod lock, mechanical brake, or pilot-operated check valve.
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