Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 70mm and 70mm give 3 controllable stop positions across a 140mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 170 mm
- Stroke 270 mm
- Total travel140 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70
The SCT63X70X70 is a double-acting tandem cylinder that provides three fixed rod positions: fully retracted (0 mm), mid-stroke (70 mm), and full extension (140 mm). Each 63 mm bore section delivers a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for multi-stop material handling.
This tie-rod cylinder features a 20 mm diameter piston rod and an M16x1.5 rod thread. The body length A(SCT) is 249 mm, and each end cap incorporates a 28 mm adjustable air cushion to decelerate the load smoothly. Standard TPU seals suit operating temperatures from -20 to +70 °C, and the PT1/4 ports connect directly to common pneumatic fittings.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 70 / 70 mm |
| Total travel | 140 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 70 mm |
| P2 (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 SCT63X70X70
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×70 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT63X70X70 Is Used
Two-Way Diverter Gate
Use the three positions (0, 70, 140 mm) to route packages to two separate conveyor lanes from a single infeed, with the retracted position acting as a neutral bypass.
Multi-Depth Pressing
Achieve two controlled pressing depths in a single cycle. The 70 mm stroke sets a partial engagement, while the full 140 mm travel completes the forming operation, both powered by 1559 N of force per section.
Staged Part Transfer
Move a workpiece through two sequential stations. The first 70 mm extension positions the part at station one, and pressurizing both sections extends the rod to 140 mm for transfer to station two.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X70 the Right Cylinder?
Select the SCT63X70X70 when your application requires two distinct extended positions without the complexity of two separate cylinders and external hard stops. For lighter loads, stepping down to a 50 mm bore reduces per-section push to 982 N at 0.5 MPa, while moving up to an 80 mm bore increases it to 2513 N. Always match the bore, both 70 mm strokes, PT thread, and basic mounting when replacing an existing unit.
For a direct replacement, ensure the new cylinder matches the SCT63X70X70 code exactly, as the 70 mm stroke is a standard offering. If the rod is subjected to significant side loads, consider external guide rails, as the tandem configuration extends the overall length and can amplify bending moments on the 20 mm rod.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 70 + 70 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 SCT63X70X70 FAQ
This model provides three distinct mechanical stop positions because both stroke sections are equal. The rod can be positioned at 0 mm (fully retracted), 70 mm (one section extended), and 140 mm (both sections extended, total travel).
Yes, if your sequence requires a 70 mm and a 140 mm stroke. The SCT integrates both strokes into a single tie-rod body, eliminating the need to synchronize two cylinders. Ensure the replacement matches the PT1/4 ports and basic mounting of your original setup.
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