Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 75mm give 4 controllable stop positions across a 125mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 150 mm
- Stroke 275 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75
The SCT50X50X75 tandem cylinder delivers four fixed rod positions—0 mm, 50 mm, 75 mm, and 125 mm total travel—by pressurising either or both of its two 50 mm bore piston sections independently. Each section generates 982 N of push force at 0.5 MPa, giving predictable thrust at every stop without complex servo controls.
This tie-rod design uses a 20 mm diameter piston rod and PT1/4 ports, with a 21 mm adjustable air cushion in each section to decelerate the load smoothly. The body length A(SCT) is 243 mm, and the cylinder operates reliably on filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 50 / 75 mm |
| Total travel | 125 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) | 50 mm |
| P2 (section 2) | 75 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 (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 SCT50X50X75
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT50X50X75 Is Used
Two-Stage Diverter Gate
Direct packages to three separate lanes by extending the rod to 50 mm, 75 mm, or the full 125 mm position, each aligning a chute with a different conveyor line.
Multi-Depth Pressing
Insert components at two controlled depths in sequence—a 50 mm partial insertion followed by a 75 mm final press—using a single compact cylinder with discrete, repeatable stops.
Staggered Part Feeding
Advance parts in a fixture with two distinct step lengths. The 50 mm stroke indexes a short pitch, and the 75 mm stroke indexes a longer pitch, all from one tandem body.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75 the Right Cylinder?
Choose the SCT50X50X75 when your process needs four discrete positions without the cost and programming of electric actuators. This tandem cylinder replaces two separate cylinders and external hard stops, simplifying the pneumatic circuit and mechanical setup. If higher force is required, step up to the 63 mm bore SCT which provides 1559 N push per section at 0.5 MPa; for lighter, faster moves, the 40 mm bore offers 628 N.
For drop-in replacement, match the 50 mm bore, both strokes (50 mm and 75 mm), PT port thread, and basic mounting. If your application requires sensor feedback, order the model with the -S magnet option to accept CMSG or DMSG sensors. Ensure the rod is guided externally if side loads are present.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT50X50X75 FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (50 mm), second section extended (75 mm), and both sections extended for the total travel of 125 mm. The positions are fixed and selected by pressurising the appropriate cylinder ports.
Yes, it is designed to do exactly that. The SCT50X50X75 integrates two piston sections on a common rod line, giving you three or four fixed stops without needing two individual cylinders, mounting brackets, and alignment. Ensure the replacement matches the 50 mm bore, both 50 mm and 75 mm strokes, and PT port thread.
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