Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 70mm and 40mm give 4 controllable stop positions across a 110mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 170 mm
- Stroke 240 mm
- Total travel110 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S
The AirTAC SCT40X70X40S is a double-acting multi-position tandem cylinder that delivers four discrete rod positions: 0 mm, 40 mm, 70 mm, and the total travel of 110 mm. Each piston section provides a theoretical push force of 628 N at 0.5 MPa, making it suitable for light sorting or diverting tasks where two different intermediate stops are required.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position sensing. The 40 mm bore features a 16 mm diameter piston rod, PT1/4 ports, and an adjustable air cushion length of 21 mm to decelerate the load smoothly at each end of the total stroke.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 70 / 40 mm |
| Total travel | 110 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 70 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 110 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X70X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×70 | 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 SCT40X70X40S Is Used
Two-Stage Diverter Gate
Operates a flap or gate to three distinct positions—closed, partial bypass at 40 mm, and full divert at 70 mm—for routing packages on a conveyor line.
Multi-Depth Label Press
Applies pressure-sensitive labels at two different insertion depths (40 mm and 70 mm) on a single product, then retracts fully, controlled by the four rod positions.
Sequential Part Feeding
Advances a workpiece through two fixed steps in an assembly fixture, stopping precisely at 40 mm for adhesive dispensing and 70 mm for a pick-and-place head.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X40S the Right Cylinder?
Choose the SCT40X70X40S when your application needs two distinct intermediate stopping points without the complexity of two separate cylinders and external stops. The tandem design ensures the 0, 40, 70, and 110 mm positions are mechanically fixed and repeatable. If you require higher force, consider stepping up to the 50 mm bore SCT, which delivers 982 N of push per section at the same 0.5 MPa pressure.
For a direct replacement, match the 40 mm bore, both the 70 mm and 40 mm stroke sections, PT port thread, and the built-in magnet. The basic mounting style means no brackets are included, so verify your existing fixture is compatible with the tie-rod body. Since the longest single stroke is under 300 mm, rod bending under axial load is generally not a concern in standard mounting orientations.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 70 + 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 SCT40X70X40S FAQ
It provides four distinct mechanical stops: 0 mm (fully retracted), 40 mm (second section extended), 70 mm (first section extended), and 110 mm (both sections extended, total travel).
Yes, the -S suffix indicates a built-in magnet along the barrel. You can attach AirTAC CMSG, DMSG, or EMSG series reed or solid-state sensors directly to the tie-rods to detect each piston position.
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