Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 55mm and 40mm give 4 controllable stop positions across a 95mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 155 mm
- Stroke 240 mm
- Total travel95 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S
The SCT50X55X40S is a double-acting multi-position tandem cylinder that provides four distinct mechanical stop positions along its stroke: 0 mm (fully retracted), 55 mm, 40 mm, and the full combined travel of 95 mm. By pressurizing either piston section independently or both together, you get a simple, pneumatic indexing solution without complex electronics. Each 50 mm bore section delivers 982 N of push force at 0.5 MPa, driven by a 20 mm diameter piston rod.
This specific model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The cylinder body has an A(SCT) length of 243 mm and uses adjustable air cushioning with a 21 mm cushion length on each section to decelerate the load smoothly. Ports are PT1/4 with an M16x1.5 rod thread, and the standard TPU seals suit operating temperatures from -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 55 / 40 mm |
| Total travel | 95 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, 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) | 55 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 95 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X55X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×55 | 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 SCT50X55X40S Is Used
Two-Stage Part Diverting
Use the four positions (0, 40, 55, 95 mm) to route parts to three different conveyor lanes. Retract for lane one, extend to 40 mm for lane two, extend to 55 mm for lane three, or use full 95 mm travel for a reject chute.
Multi-Depth Pressing
Achieve two distinct pressing depths in a single cycle. The 40 mm stroke provides a shallow pre-form depth, while the 55 mm stroke delivers a deeper final form, all controlled by simple pneumatic valves.
Sequential Clamping Fixture
Operate a two-step clamping sequence where the first section extends 40 mm to position a clamp near the workpiece, and the second section extends 55 mm to apply final clamping force, preventing part distortion.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40S the Right Cylinder?
Choose the SCT tandem cylinder when you need fixed, repeatable intermediate stops without the cost of servo drives or the complexity of external shock absorbers and multiple valves. For this 50 mm bore model, the per-section push force at 0.5 MPa is 982 N; if your application requires higher force, stepping up to a 63 mm bore SCT provides 1559 N per section at the same pressure. Ensure the two strokes (55 mm and 40 mm) match your required position set exactly, as these discrete stops are not infinitely adjustable.
For a direct replacement, match the 50 mm bore, both strokes (55 mm and 40 mm), the PT port thread, and the built-in magnet. Since the total travel is 95 mm, rod bending is typically not a concern, but always align the load axially with the rod to prevent side-loading and premature seal wear. This basic mounting model can be paired with FA, FB, CA, CB, or LB brackets if needed for installation.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 55 + 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 SCT50X55X40S FAQ
This cylinder provides 4 discrete mechanical stop positions because the two strokes are different (55 mm and 40 mm). The rod can be positioned at 0 mm (fully retracted), 55 mm (section one extended), 40 mm (section two extended), and 95 mm (both sections extended for total travel).
Yes, the -S suffix indicates a built-in magnet is installed along the barrel. You can mount AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly onto the cylinder's tie-rods to detect any of the four piston positions, including the intermediate stops at 40 mm and 55 mm.
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