Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 125mm give 3 controllable stop positions across a 250mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1125 mm
- Stroke 2125 mm
- Total travel250 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S
The SCT63X125X125S is a double-acting tandem cylinder that provides three distinct mechanical stop positions along its 250 mm total stroke: fully retracted (0 mm), mid-stroke (125 mm), and fully extended (250 mm). Each piston section delivers a push force of 1559 N at 0.5 MPa, scaling to 2805 N at 0.9 MPa, making it a robust actuator for mid-range pneumatic sorting and diverting tasks. The integrated magnet allows direct mounting of CMSG or DMSG sensors for reliable end-of-stroke and mid-position detection.
Built on a durable tie-rod construction with a 20 mm diameter piston rod and PT1/4 ports, this cylinder includes an adjustable air cushion (28 mm length) to decelerate the load smoothly at each end of travel. The standard TPU seals provide reliable operation in ambient temperatures from -20 to +70 °C. With a body length of 249 mm plus the 250 mm total stroke, it fits neatly into machines requiring three fixed, repeatable positions without complex servo controls.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 125 / 125 mm |
| Total travel | 250 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) | 125 mm |
| P2 (both extended) | 250 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 SCT63X125X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT63X125X125S Is Used
3-Position Diverter Gates
Ideal for conveyor systems where a gate must reliably stop at a center pass-through position, a left divert, and a right divert. The 125 mm and 250 mm strokes provide ample travel for wide chutes.
Two-Depth Pressing or Stamping
Achieve a shallow pre-press at 125 mm and a full-depth form at 250 mm in assembly fixtures. The 1559 N per-section force at 0.5 MPa handles consistent medium-duty forming tasks.
Multi-Stop Part Feeding
Controls a stop pin with three precise positions to meter parts of different sizes into a machine cell. The built-in magnet enables sensor feedback at each discrete stop to trigger the next cycle.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X125S the Right Cylinder?
Choose the SCT63X125X125S when your application requires a fixed three-position sequence, such as a diverter gate with a center rest position. This tandem unit is more compact and cost-effective than using two separate 125 mm stroke cylinders with external stops and sequencing valves. If your force requirement is lower, consider stepping down to the 50 mm bore SCT50X125X125, which provides 982 N of push per section at 0.5 MPa. For a direct replacement, ensure the new unit matches the 63 mm bore, both 125 mm strokes, PT port thread, and the -S magnet option for sensor compatibility.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 125 + 125 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 SCT63X125X125S FAQ
This model provides three distinct mechanical stop positions because both stroke sections are equal at 125 mm. The rod positions are 0 mm (fully retracted), 125 mm (mid-stroke, one section actuated), and 250 mm (fully extended, both sections actuated).
Yes, if your sequence requires a fixed three-position movement. The SCT unit replaces the need for two separate cylinders, external hard stops, and complex valve logic to sequence them. Ensure the replacement matches the 63 mm bore, PT1/4 ports, and the -S magnet option if you are using magnetic sensors.
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