Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 5mm give 4 controllable stop positions across a 25mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 120 mm
- Stroke 25 mm
- Total travel25 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S
The AirTAC SCT63X20X5S multi-position cylinder provides four discrete rod stops at 0, 20, 5, and 25 mm by pressurising its two tandem piston sections independently. Each 63 mm bore section delivers 1559 N of push force at 0.5 MPa, making it a compact solution for short-throw, multi-stop tasks.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors, enabling reliable end-of-stroke or mid-position detection without external brackets. The 20 mm rod with M16x1.5 thread and PT1/4 ports keeps the package rigid, while the 28 mm air cushion at each end absorbs energy quietly.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 20 / 5 mm |
| Total travel | 25 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) | 20 mm |
| P2 (section 2) | 5 mm |
| P3 (both extended) | 25 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 SCT63X20X5S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×5 | 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 SCT63X20X5S Is Used
Two-Stage Sorting Gate
Uses the 5 mm stroke for a partial gate opening to separate small parts, and the 20 mm stroke for full flow, giving three active divert positions.
Multi-Depth Pressing
Provides two controlled pressing depths in a small assembly fixture, with the 0 mm retracted position for part loading and unloading.
Short-Stroke Shuttle Stop
Acts as a three-stop shuttle on a compact conveyor, stopping a pallet at 5 mm for inspection and 20 mm for the next process step.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X5S the Right Cylinder?
Choose the SCT63X20X5S when a process needs four fixed positions from a single tie-rod assembly, avoiding the complexity of two separate cylinders and external hard stops. The 5 mm differential stroke allows a very fine secondary advance, useful for precise shuttling or sorting. If higher force is required, the SCT80 bore offers 2513 N push per section at the same pressure. For replacement, match the 63 mm bore, both 20 mm and 5 mm strokes, PT thread, and the -S magnet option; the basic mount fits where the cylinder body is supported directly.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 5 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 SCT63X20X5S FAQ
It provides four distinct rod positions: 0 mm (fully retracted), 20 mm (section 1 extended), 5 mm (section 2 extended), and 25 mm (both sections extended). The stops are fixed by the two stroke lengths.
Yes, if the stops are at 20 mm and 25 mm from the retracted position. The SCT63X20X5S achieves this in a single tie-rod body, saving space and eliminating the need to synchronise two separate cylinders. Ensure the bore, both strokes, and PT port thread match your existing setup.
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