Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 70mm and 12mm give 4 controllable stop positions across a 82mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 170 mm
- Stroke 212 mm
- Total travel82 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12
The SCT63X70X12 is a double-acting tandem cylinder that delivers four fixed rod positions from two independent piston sections on a common rod line. With strokes of 70 mm and 12 mm, the reachable stops are 0 mm (fully retracted), 12 mm, 70 mm, and the total travel of 82 mm. Each 63 mm bore section generates a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
This model uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. The integral air cushion is 28 mm long, providing adjustable end-of-stroke deceleration. The body length A(SCT) is 249 mm. Standard TPU seals suit ambient temperatures from -20 to +70 °C, making the cylinder a reliable choice for general industrial multi-stop tasks.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 70 / 12 mm |
| Total travel | 82 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) | 70 mm |
| P2 (section 2) | 12 mm |
| P3 (both extended) | 82 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 SCT63X70X12
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×70 | Stroke 1 (section 1) in mm. |
| ×12 | 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 SCT63X70X12 Is Used
Two-Stage Clamping
The 70 mm stroke rapidly closes a clamp to a preset gap, and the final 12 mm stroke applies controlled clamping force. This prevents part damage from high-speed impact.
Dual-Position Sorting Gate
Retract to 0 mm for one lane, extend to 12 mm for a middle divert path, or fully extend to 82 mm to reach a third conveyor line. The 4-position capability directs parts without multiple actuators.
Step Drilling or Tapping
The 70 mm stroke performs rapid approach, while the additional 12 mm stroke executes a controlled feed for the final depth. The 1559 N push force handles tough drilling heads.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X12 the Right Cylinder?
Specify the SCT when a pneumatic system needs two or more discrete, repeatable stop positions without the complexity of servo control or multiple individual cylinders. The 70 mm and 12 mm stroke combination here is ideal for a long primary travel with a short secondary positioning step, such as advancing a tool to a standby position before a final short feed. If higher force is needed, stepping up to the 80 mm bore provides 2513 N of push per section at 0.5 MPa.
For direct replacement, match the 63 mm bore, both the 70 mm and 12 mm strokes, PT port thread, and basic mounting configuration. If the replacement unit requires position sensing, select an SCT63X70X12S with a built-in magnet to accept CMSG or DMSG sensors.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 70 + 12 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 SCT63X70X12 FAQ
This cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 12 mm, 70 mm, and the combined total travel of 82 mm. You select a position by pressurizing the first section, the second section, or both simultaneously.
Each of the two 63 mm bore sections independently produces 1559 N of push force and 1402 N of pull force at 0.5 MPa. The force does not double when both sections are pressurized; the maximum push force per section at 0.9 MPa is 2805 N.
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