Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 25mm give 4 controllable stop positions across a 275mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1250 mm
- Stroke 225 mm
- Total travel275 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S
The AirTAC SCT40X250X25S tandem cylinder delivers four fixed, repeatable rod positions by combining two piston sections with strokes of 250 mm and 25 mm. The reachable stops are 0 mm (fully retracted), 25 mm, 250 mm, and the total travel of 275 mm, selected by pressurising the appropriate air ports. Each actuated section provides a push force of 628 N at 0.5 MPa, giving predictable power for multi-step operations.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the 40 mm bore tie-rod barrel for end-of-stroke or intermediate position feedback. The 16 mm diameter piston rod and 21 mm adjustable air cushion at both ends ensure smooth deceleration, while the compact body length of 235 mm plus strokes keeps the overall envelope manageable for machine builders.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 250 / 25 mm |
| Total travel | 275 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) | 250 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 275 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 SCT40X250X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×250 | 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 SCT40X250X25S Is Used
Two-Stage Clamping
A rapid 250 mm advance stroke brings the clamp near the workpiece, followed by a short 25 mm power stroke for final high-force clamping, all from one compact cylinder body.
Part Sorting Gate
Three distinct gate positions (home, partial open at 25 mm, full open at 275 mm) direct parts to different conveyor lanes, with sensor confirmation at each stop via the built-in magnet.
Dual-Depth Pressing
Controls a pressing tool to two different depths in sequence—a 250 mm initial forming stroke and a 25 mm coining or finishing stroke—without resetting the tooling.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X25S the Right Cylinder?
Choose the SCT40X250X25S when an application requires two distinct extended positions plus the retracted home, eliminating the complexity and cost of mounting two separate cylinders with external hard stops. The 250 mm section handles the primary long travel, while the 25 mm section provides a precise fine-feed or secondary position. If higher thrust is needed, stepping up to the 50 mm bore SCT provides 982 N of push force per section at the same pressure. For a direct replacement, match the 40 mm bore, both 250 mm and 25 mm strokes, PT port thread, and the integrated magnet for sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 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 SCT40X250X25S FAQ
This model provides four distinct rod positions: 0 mm (fully retracted), 25 mm (stroke 2 only), 250 mm (stroke 1 only), and 275 mm (both strokes extended, total travel).
Yes. The -S suffix denotes a built-in magnet, making the barrel compatible with AirTAC CMSG (reed), DMSG (solid-state), and EMSG (explosion-proof) sensors for position detection at any of the four stops.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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