Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 90mm and 20mm give 4 controllable stop positions across a 110mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 190 mm
- Stroke 220 mm
- Total travel110 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S
The SCT63X90X20S is a double-acting tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 20 mm, 90 mm, and the total travel of 110 mm. Each piston section generates 1559 N of push force at 0.5 MPa, making it a capable multi-stop actuator for sorting or diverting tasks that require two distinct extended positions without complex servo controls.
A built-in magnet is integrated into the piston, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for precise position feedback. The 63 mm bore uses a 20 mm diameter rod, PT1/4 ports, and a 28 mm adjustable air cushion at each end to decelerate the load smoothly.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 90 / 20 mm |
| Total travel | 110 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) | 90 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 110 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 SCT63X90X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×90 | 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 SCT63X90X20S Is Used
Two-Way Part Diverter
Extends to 20 mm for a reject chute and 90 mm for an accept lane, with sensors confirming arrival at each discrete stop.
Sequential Clamping Station
Applies a light initial clamp at 20 mm stroke to align a part, then drives to the full 90 mm position for high-force holding during machining.
Dual-Depth Pressing Operation
Provides a precise pre-press stop at 20 mm and a final forming depth at 90 mm, ensuring consistent part dimensions across cycles.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X90X20S the Right Cylinder?
This four-position model is ideal when an application needs two separate forward stopping points, such as a diverter gate with a primary and secondary path. Compared to using two individual cylinders with external hard stops, the SCT tandem design simplifies plumbing and mounting while guaranteeing repeatable mechanical positions. If the per-section force is more than required, stepping down to a 50 mm bore reduces push force to 982 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N.
When replacing an existing SCT, match the 63 mm bore, both strokes (90 mm and 20 mm), the PT port thread, and the integrated magnet (-S suffix). Ensure the load is guided if the combined 110 mm stroke creates a significant moment arm, as the rod bearing is not designed to support heavy side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 90 + 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 SCT63X90X20S FAQ
This cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 20 mm, 90 mm, and 110 mm (total travel). The 20 mm and 90 mm positions are achieved by pressurizing the respective piston sections independently, while the 110 mm position requires both sections to be pressurized simultaneously.
Yes. The -S suffix in SCT63X90X20S indicates a built-in magnet, which is required for AirTAC's CMSG, DMSG, or EMSG sensors to detect the piston position. The sensors clamp directly onto the cylinder's tie-rod barrel without additional brackets.
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