Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 165mm give 4 controllable stop positions across a 205mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 140 mm
- Stroke 2165 mm
- Total travel205 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S
The SCT63X40X165S is a multi-position pneumatic cylinder that provides four fixed rod positions by combining two strokes on a single axis: 0 mm (fully retracted), 40 mm, 165 mm, and a total extended travel of 205 mm. This tandem design eliminates the complexity of aligning two separate cylinders for sequential stops. Each piston section delivers a push force of 1559 N at 0.5 MPa, with a 20 mm rod and PT1/4 ports.
An integrated magnet (-S suffix) is built into the piston, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the tie-rod barrel for reliable end-of-stroke or intermediate position detection. The cylinder uses a durable TPU seal, operates on standard filtered air, and features a 28 mm adjustable air cushion on each section to manage deceleration. Its body length A(SCT) is 249 mm, making it a compact solution for multi-stop actuation.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 40 / 165 mm |
| Total travel | 205 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) | 40 mm |
| P2 (section 2) | 165 mm |
| P3 (both extended) | 205 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 SCT63X40X165S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×165 | 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 SCT63X40X165S Is Used
Two-Stage Diverter Gate
Operates a sorting gate with a partial-open position at 40 mm for one lane and a full-open position at 205 mm for another, controlled by pressurizing each section independently.
Sequential Part Clamping
Applies an initial low-force clamp at the 40 mm stroke to position a delicate part, then advances to the full 205 mm stroke to engage a secondary holding fixture with full pneumatic force.
Multi-Depth Pressing
Executes a two-depth pressing operation where the first piston section stops at 40 mm for a shallow form, and activating the second section completes the stroke to 205 mm for a deep draw.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X165S the Right Cylinder?
Choose this SCT model when your process needs a single actuator to reliably hit four distinct mechanical stops without the cost and plumbing of two independent cylinders and external hard stops. The 40 mm and 165 mm stroke combination is well-suited for a short primary movement followed by a longer secondary feed. If your force requirement is lower, stepping down to a 50 mm bore reduces per-section push to 982 N at 0.5 MPa; for higher thrust, the 80 mm bore provides 2513 N per section.
For a direct replacement, match the 63 mm bore, both strokes (40 mm and 165 mm), PT port thread, and the integrated magnet (-S). Since the total travel reaches 205 mm, ensure the rod is adequately guided if significant side loads are present to prevent bending or uneven seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 165 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 SCT63X40X165S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 40 mm (first section extended), 165 mm (second section extended), and 205 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, the SCT is a standard double-acting cylinder and will not lock or hold position if air pressure is exhausted or lost. The piston can drift under load. If you need to securely hold a load at an intermediate stop without live pressure, you must add an external rod brake or a pilot-operated check valve to the circuit.
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