Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 20mm give 3 controllable stop positions across a 40mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 120 mm
- Stroke 220 mm
- Total travel40 mm
- Positions3 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20
The SCT32X20X20 is a tie-rod tandem cylinder that delivers three fixed rod positions from its two 20 mm stroke sections. With both pistons retracted the rod is at 0 mm; energising one section extends it to 20 mm, and pressurising both gives the full 40 mm total travel. This compact 32 mm bore unit uses a 12 mm diameter rod and provides a push force of 402 N per actuated section at 0.5 MPa.
The cylinder body has an A(SCT) dimension of 233 mm and features PT1/8 ports with M10x1.25 rod threads. Adjustable air cushioning is built into both ends with a 21 mm cushion length, allowing smooth deceleration at each stop. It operates on standard filtered air from 0.15 to 1.0 MPa, with a maximum push of 724 N per section at 0.9 MPa.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 20 / 20 mm |
| Total travel | 40 mm |
| Stop positions | 3 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 20 mm |
| P2 (both extended) | 40 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCT32X20X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×20 | 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 SCT32X20X20 Is Used
3-Way Diverter Gate
Positions a small diverter chute to three fixed angles (0, 20, 40 mm stroke) for routing packages or components down different conveyor lanes.
Two-Stage Ejector
Provides a partial eject (20 mm) to loosen a part from a nest and a full eject (40 mm) to clear it, all from one compact tandem cylinder.
Multi-Depth Stop
Acts as a programmable hard stop for a slide table, offering retracted, mid, and extended positions for two different drilling or pressing depths.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X20 the Right Cylinder?
Choose the SCT32X20X20 when your application needs a compact actuator to index between three precise mechanical stops without the complexity of two separate cylinders and external brackets. It is a direct replacement for an existing AirTAC SCT32X20X20 with PT threads and basic mounting. If you need more push force, stepping up to the 40 mm bore provides 628 N per section at the same 0.5 MPa pressure. For loads that must hold position without live air pressure, an external pilot-operated check valve or rod lock is required, as the air cushion does not act as a brake.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 20 + 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 SCT32X20X20 FAQ
It provides 3 distinct mechanical stop positions because both stroke sections are equal at 20 mm. The rod positions are fully retracted (0 mm), one section extended (20 mm), and both sections extended for the total travel (40 mm).
Yes, if your sequence requires extending to 20 mm and then 40 mm from the same rod line. The SCT integrates both strokes into a single tie-rod body, saving space and eliminating the need to synchronise two separate cylinders. Ensure the port size (PT1/8) and mounting style match your machine.
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