Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 75mm give 4 controllable stop positions across a 175mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1100 mm
- Stroke 275 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S
The SCT50X100X75S is a tandem multi-position cylinder that delivers four fixed rod positions from two strokes on a single axis. With a 100 mm front section and a 75 mm rear section, the rod can be precisely located at 0 mm (fully retracted), 75 mm, 100 mm, or the total travel of 175 mm by pressurising the sections individually or together.
Each 50 mm bore piston section provides 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa. The unit features a 20 mm diameter rod, PT1/4 ports, and a 21 mm adjustable air cushion. The integrated -S magnet allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 100 / 75 mm |
| Total travel | 175 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) | 100 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 175 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 SCT50X100X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT50X100X75S Is Used
Two-Stage Sorting Gate
Directs parts to one of three conveyor lanes using the 75 mm and 100 mm stops. The 175 mm total travel provides a fourth, fully extended position for a reject or bypass chute.
Multi-Depth Press Insertion
Installs bushings to two different depths in a single station. The 75 mm stop sets a shallow pre-press, and the 100 mm stop completes a full-depth seat, controlled by discrete valve signals.
Three-Position Part Transfer
Shifts a workpiece between a pick point, an inspection station, and an assembly nest. The four distinct rod positions (0, 75, 100, 175 mm) map directly to each fixed station location.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X100X75S the Right Cylinder?
Select the SCT50X100X75S when an application needs four discrete linear stops without the complexity of two separate cylinders and external hard stops. This model is ideal where the two working positions are asymmetric. If higher force is required, consider stepping up to the 63 mm bore SCT63 series, which delivers 1559 N of push per section at the same 0.5 MPa pressure. For a lighter load, the 40 mm bore provides 628 N.
As a direct replacement, match the 50 mm bore, the 100 mm and 75 mm strokes, PT port thread, and the built-in magnet. This is a basic mounting model; if a pivoting mount is needed, select a version with a CA or CB rear clevis. For strokes over 300 mm, evaluate side-loading and consider adding an external guide rod assembly.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 75 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 SCT50X100X75S FAQ
It provides four distinct mechanical stop positions. The rod end can be located at 0 mm (fully retracted), 75 mm (rear section extended), 100 mm (front section extended), and 175 mm (both sections extended for total travel).
No. Like all standard pneumatic cylinders, the SCT does not have a mechanical locking or holding brake. If air pressure is exhausted or a directional valve centers, the piston rod can drift or drop under load. To hold a position without live pressure, you must add an external rod lock or a pilot-operated check valve.
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