Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 80mm and 25mm give 4 controllable stop positions across a 105mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 180 mm
- Stroke 225 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S
The SCT40X80X25S is a double-acting tandem cylinder that delivers four fixed rod positions—0 mm, 25 mm, 80 mm, and the full combined travel of 105 mm—by pressurising its two piston sections independently or together. Each section provides 628 N of push force at 0.5 MPa, driven by a 16 mm diameter rod through PT1/4 ports.
A built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for end-of-stroke or intermediate position confirmation. The body length A is 235 mm and the adjustable air cushion on each section is 21 mm, giving smooth deceleration at every stop without requiring external shock absorbers.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 80 / 25 mm |
| Total travel | 105 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) | 80 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 105 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 SCT40X80X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×80 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT40X80X25S Is Used
Two-Stage Diverter Gate
Uses the 25 mm and 80 mm stops to align a chute with two separate conveyor lines, while the 105 mm total travel parks the gate in a neutral home position.
Multi-Depth Pressing
Provides two distinct pressing depths (25 mm and 80 mm) for inserting components into a housing, with full retraction at 0 mm and full extension at 105 mm for part ejection.
Three-Position Stop Pin
Extends a stop pin to 25 mm for small pallets or 80 mm for large pallets on a single conveyor lane, retracting fully to 0 mm to let pallets pass.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X80X25S the Right Cylinder?
Choose the SCT when an application needs more than two fixed mechanical stops from a single compact actuator, avoiding the complexity of mounting two separate cylinders in series. If the 628 N push force per section at 0.5 MPa is insufficient, stepping up to the 50 mm bore SCT provides 982 N per section; if the stroke combination needs to change, match both the 80 mm and 25 mm section strokes exactly when replacing an existing unit. For position sensing, this -S model is ready for CMSG/DMSG sensors; a non-magnet version would require external flag or proximity switches.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 80 + 25 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 SCT40X80X25S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 25 mm (section 2 extended), 80 mm (section 1 extended), and 105 mm (both sections extended, total travel). The two unequal strokes give four distinct mechanical stops.
Yes, if the application requires the specific 25 mm and 80 mm discrete stops. The SCT integrates both strokes into a single tandem body, saving mounting space and eliminating the need to synchronise two separate cylinders. Ensure the port thread (PT1/4), bore (40 mm), and magnet option (-S) match your sensor setup.
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