Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 40mm give 4 controllable stop positions across a 75mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 135 mm
- Stroke 240 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S
The SCT32X35X40S is a double-acting multi-position cylinder that delivers four distinct rod stops from two piston sections on a single axis. With strokes of 35 mm and 40 mm, the reachable positions are 0 mm (fully retracted), 35 mm, 40 mm, and the combined total travel of 75 mm. Each section provides a push force of 402 N at 0.5 MPa, giving precise, repeatable discrete positioning without complex servo controls.
This model includes a built-in magnet (suffix -S), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The 12 mm diameter rod runs through a 21 mm adjustable air cushion, and the body length A(SCT) is 233 mm. It operates on standard filtered air from 0.15 to 1.0 MPa, with TPU seals rated for -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 35 / 40 mm |
| Total travel | 75 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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, 21 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) | 35 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 75 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCT32X35X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT32X35X40S Is Used
Two-Stage Diverter Gate
Uses the 35 mm and 40 mm stops to route packages to three separate conveyor lanes from one infeed, with the fourth position (75 mm) serving as a bypass.
Multi-Depth Insertion
Presses a component to two different depths (35 mm and 40 mm) in sequence, then fully retracts, ideal for assembly stations requiring stepped insertion.
Sorting Stop for Small Parts
Provides three active stop positions for sorting small electronic or medical parts by height, using the 0 mm, 35 mm, and 75 mm positions with sensor feedback via the built-in magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X40S the Right Cylinder?
Choose the SCT32X35X40S when you need four fixed mechanical stops without the cost and programming of a servo axis. It replaces setups that would otherwise require two separate cylinders and external hard stops, simplifying the pneumatic circuit and reducing mounting space. For higher thrust, step up to the 40 mm bore SCT, which delivers 628 N push per section at 0.5 MPa.
To replace an existing unit, match the 32 mm bore, the exact stroke pair (35 mm and 40 mm), the PT port thread, and the built-in magnet (-S). This model uses a basic mount with no additional brackets; if your application requires pivoting, consider the CA or CB clevis options on a new order.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 40 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 SCT32X35X40S FAQ
It provides four discrete mechanical stop positions: 0 mm (fully retracted), 35 mm (section one extended), 40 mm (section two extended), and 75 mm (both sections extended for total travel).
No, the SCT is a standard pneumatic cylinder and does not lock or hold position when air pressure is lost or a valve is centered. The piston will drift under load. If you need to hold a position without live pressure, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve.
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