Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 75mm give 3 controllable stop positions across a 150mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 175 mm
- Stroke 275 mm
- Total travel150 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S
The SCT50X75X75S is a tandem multi-position pneumatic cylinder that delivers three fixed rod positions: fully retracted (0 mm), extended to the first section stroke (75 mm), and fully extended using both sections (150 mm). Each 50 mm bore section generates 982 N of push force at 0.5 MPa, driven through a 20 mm diameter piston rod, making it suitable for repetitive two-stop feeding or sorting tasks where intermediate and full-extension points must be hit reliably.
This model includes a built-in magnet (-S suffix), allowing standard AirTAC CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The cylinder body has an A-length of 243 mm, uses PT1/4 ports, and features an adjustable air cushion of 21 mm on each section to manage end-of-stroke deceleration. It operates on filtered air from 0.15 to 1.0 MPa.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 75 / 75 mm |
| Total travel | 150 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 75 mm |
| P2 (both extended) | 150 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 SCT50X75X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT50X75X75S Is Used
Two-Position Diverter Gate
Actuates a flap or gate to three distinct positions: closed (0 mm), partial bypass (75 mm), and full divert (150 mm), routing products down different conveyor lanes.
Multi-Stop Part Feeding
Advances a pusher plate to a pre-stage position at 75 mm for inspection, then completes the stroke to 150 mm to load the part into a fixture, all with one compact cylinder.
Two-Depth Pressing or Staking
Provides a light-contact position at 75 mm for alignment, followed by a full 150 mm stroke for the final press operation, ensuring consistent depth control without an external hard stop.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X75S the Right Cylinder?
Choose the SCT when your application needs two or three fixed mechanical stops without the complexity of servo controls or multiple individual cylinders. For this 50 mm bore, if your load requires less force, stepping down to a 40 mm bore provides about 628 N of push per section at 0.5 MPa. If you need a direct replacement, match the 50 mm bore, both 75 mm strokes, PT port thread, and the -S magnet option; the basic mounting style means no additional brackets are included, so you can use your existing mounting hardware.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 75 + 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 SCT50X75X75S FAQ
It provides 3 discrete mechanical stops: 0 mm (fully retracted), 75 mm (first section extended), and 150 mm (both sections extended). Because both strokes are equal at 75 mm, the 75 mm and 150 mm positions are the only extended stopping points.
Yes, in many cases. A single SCT50X75X75S can replace two standard SC50X75 cylinders mounted back-to-back, saving space and eliminating the need to synchronize two separate air circuits. Ensure the replacement matches the 50 mm bore, both 75 mm strokes, PT ports, and the -S magnet if sensor feedback is required.
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