Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 185mm and 25mm give 4 controllable stop positions across a 210mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1185 mm
- Stroke 225 mm
- Total travel210 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S
The SCT50X185X25S tandem cylinder provides four fixed rod positions—0 mm, 25 mm, 185 mm, and 210 mm—by combining two piston sections on a single 20 mm rod. Each section delivers 982 N of push force at 0.5 MPa, making it a compact alternative to complex multi-actuator setups for sequenced linear movements.
A built-in magnet allows direct mounting of CMSG or DMSG sensors for non-contact position feedback. The tie-rod body has a 243 mm base length and PT1/4 ports, with a 21 mm air cushion in each section to manage end-of-stroke deceleration.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 185 / 25 mm |
| Total travel | 210 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) | 185 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 210 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 SCT50X185X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×185 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT50X185X25S Is Used
Two-Stage Sorting Gate
The 25 mm stroke partially extends a diverter for one lane, while the full 210 mm travel reaches a second lane, enabling three-way product sorting from a single actuator.
Dual-Depth Pressing
Actuate the 25 mm section for a light pre-press or locating step, then engage the 185 mm section for the full forming stroke, achieving two working depths without tooling changes.
Multi-Stop Part Staging
Use the four discrete stops to stage parts at different positions along a conveyor. The built-in magnet confirms each position via sensors before the next operation begins.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X185X25S the Right Cylinder?
This 4-position unit replaces two separate cylinders or an actuator with external hard stops, reducing plumbing and mounting complexity. The 185 mm stroke section handles the primary travel, while the 25 mm section provides a precise secondary offset. If higher force is needed, stepping up to the 63 mm bore provides 1559 N push at 0.5 MPa.
For direct replacement, match the 50 mm bore, both strokes (185 mm and 25 mm), PT thread, and the S magnet option. When the longer 185 mm section is fully extended, ensure the rod is guided if significant side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 185 + 25 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 SCT50X185X25S FAQ
The rod stops at 0 mm (fully retracted), 25 mm (section 2 extended), 185 mm (section 1 extended), and 210 mm (both sections extended, total travel).
Yes, if your sequence requires two fixed strokes from the same rod axis. It saves space and eliminates the need to synchronize two separate cylinders, provided the per-section force of 982 N at 0.5 MPa meets your load requirements.
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