Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 20mm give 4 controllable stop positions across a 70mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 150 mm
- Stroke 220 mm
- Total travel70 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S
The SCT40X50X20S creates four fixed rod positions—0 mm, 50 mm, 20 mm, and the combined 70 mm—by pressurising its two tandem piston sections independently. Each 40 mm bore section delivers 628 N of push force at 0.5 MPa, making it suitable for light sorting or diverting tasks where a single cylinder cannot provide the required number of stops.
A built-in magnet allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The 16 mm diameter rod and 21 mm air cushion at each end support reliable cycling, while the PT1/4 ports keep connections compact for space-constrained multi-stop stations.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 50 / 20 mm |
| Total travel | 70 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) | 50 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 70 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 SCT40X50X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT40X50X20S Is Used
Two-Way Diverter Gate
Positions at 0, 20, 50, and 70 mm route packages to four separate lanes on a single conveyor merge point.
Multi-Depth Pressing
A pressing tool stops at 20 mm for a shallow form and 70 mm for a deep draw, with 50 mm as an intermediate inspection height.
Staged Part Feeding
An escapement mechanism advances parts in three distinct steps (20, 50, 70 mm) from a magazine into a pick-and-place nest.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20S the Right Cylinder?
Choose the SCT40 when you need up to four mechanical stops without the complexity of two separate cylinders and external hard stops. If your load demands more force, stepping up to the 50 mm bore provides 982 N of push per section at the same 0.5 MPa. For direct replacement, match the 40 mm bore, both 50 mm and 20 mm strokes, PT port thread, and the -S magnet option; basic mounting means no additional brackets are included. When the combined 70 mm travel is fully extended, ensure the load is guided to prevent bending the 16 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 20 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 SCT40X50X20S FAQ
It provides four discrete rod positions: fully retracted (0 mm), first section extended (50 mm), second section extended (20 mm), and both sections extended for the total travel of 70 mm.
Yes, the -S suffix indicates a built-in magnet, so you can mount AirTAC CMSG, DMSG, or EMSG reed and solid-state sensors directly on the cylinder body to detect each stop position.
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Standard models usually ship in 3-4 days.
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Related AirTAC SCT Multi-Position Cylinders
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