Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 80mm give 4 controllable stop positions across a 100mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 120 mm
- Stroke 280 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S
The SCT63X20X80S is a double-acting multi-position cylinder that provides four fixed rod positions by combining two piston sections on a single axis. With strokes of 20 mm and 80 mm, the reachable stops are 0 mm (fully retracted), 20 mm, 80 mm, and the total travel of 100 mm, giving machinery designers a compact way to sequence two distinct extend positions without dual cylinders.
Each 63 mm bore section delivers 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa. The unit features a 20 mm diameter rod, PT1/4 ports, and a 28 mm adjustable air cushion. A built-in magnet allows CMSG, DMSG, or EMSG sensors to mount directly on the tie-rod barrel for non-contact position sensing.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 20 / 80 mm |
| Total travel | 100 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) | 80 mm |
| P3 (both extended) | 100 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 SCT63X20X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×80 | 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 SCT63X20X80S Is Used
Two-Stage Part Diverting
Uses the 20 mm stop for a partial gate opening and the 80 mm or 100 mm stops for full diversion, routing parts to three different lanes from one conveyor position.
Sequential Clamping with Pre-Load
The 20 mm stroke applies a light pre-clamp force, while the 80 mm stroke engages full clamping pressure, protecting delicate assemblies during the initial contact phase.
Dual-Depth Pressing or Staking
Delivers a precise 20 mm shallow press depth and an 80 mm deep press depth from the same tooling station, eliminating the need for a secondary actuator or manual depth adjustment.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X80S the Right Cylinder?
Choose this tandem cylinder when an application needs two different extend lengths from a single compact assembly, such as a two-step ejector or a diverter gate with an intermediate position. The 20 mm and 80 mm stroke combination creates a short first step and a longer second step, with the full 100 mm reach available when both sections are pressurized. If higher force is required, stepping up to the 80 mm bore provides 2513 N push per section at 0.5 MPa.
For drop-in replacement, match an AirTAC SCT with a 63 mm bore, 20 mm and 80 mm section strokes, PT thread, and the -S magnet option. The basic mounting configuration accepts the full SCT accessory range—FA/FB flanges, CA/CB devises, or LB foot mounts—if a bracket is needed later. Because the longer 80 mm section stroke remains well within standard limits, no additional rod guiding is typically required for axial loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 80 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 SCT63X20X80S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 20 mm (first section extended), 80 mm (second section extended), and 100 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurizing the sections individually or together.
Each 63 mm bore section produces 1559 N push and 1402 N pull at 0.5 MPa. The sections do not add their force together for a combined thrust value; the multi-position design sequences the rod to different stops, and the load at any stop is driven by the force of the section(s) being pressurized at that moment.
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