Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 20mm give 4 controllable stop positions across a 140mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1120 mm
- Stroke 220 mm
- Total travel140 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S
The SCT63X120X20S tandem cylinder delivers four fixed rod positions—0 mm (fully retracted), 20 mm, 120 mm, and 140 mm total travel—by pressurizing its two piston sections independently. Each actuated section generates a push force of 1559 N at 0.5 MPa, scaling to 2805 N at the maximum operating pressure of 0.9 MPa, driven through a 20 mm diameter rod.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCT) is 249 mm, and the PT1/4 ports feed adjustable air cushions with a 28 mm cushion length, providing smooth deceleration at each end of the combined stroke.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 120 / 20 mm |
| Total travel | 140 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, 28 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) | 120 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 140 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X120X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×120 | 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 SCT63X120X20S Is Used
Two-Stage Sorting Gate
Use the 20 mm stroke to partially open a diverter gate for small items and the 120 mm stroke for full opening to pass larger packages, all controlled by two valves.
Dual-Depth Pressing
Achieve a precise 20 mm pre-press position to align components, then drive the full 140 mm total travel for the main forming operation with 2805 N of force at 0.9 MPa.
Multi-Stop Part Feeding
Stop a feed slide at a 20 mm sensing position to verify part orientation, advance to 120 mm for a transfer, or extend fully to 140 mm for a reject chute, with sensor confirmation via the built-in magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X120X20S the Right Cylinder?
Choose the SCT63X120X20S when your process needs a light 20 mm advance for a sensing or low-force positioning step followed by a longer 120 mm power stroke, all from a single compact assembly. The built-in magnet eliminates the need for external sensor brackets, simplifying setup on packaging or sorting machines. If your push force requirement is lower, the 50 mm bore SCT offers 982 N per section; for higher force, the 80 mm bore provides 2513 N per section at the same 0.5 MPa.
As a direct replacement, match the 63 mm bore, both strokes (120 mm and 20 mm), PT port thread, and the -S magnet option. The basic mounting configuration means the cylinder body is not supplied with brackets, so you must reuse or order your existing FA, FB, CA, CB, or LB mounting accessories separately.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 120 + 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 SCT63X120X20S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 20 mm (section 2 extended), 120 mm (section 1 extended), and 140 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurizing the corresponding air ports.
Match the 63 mm bore, both stroke lengths (120 mm and 20 mm), the PT port thread, and the -S magnet option for sensor compatibility. The basic model comes without mounting brackets, so ensure you have the correct FA, FB, CA, CB, or LB accessories from your original installation.
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