Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 275mm and 25mm give 4 controllable stop positions across a 300mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1275 mm
- Stroke 225 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S
The SCT40X275X25S is a double-acting tandem cylinder that delivers four fixed rod positions from two independent piston sections on a single axis. With strokes of 275 mm and 25 mm, the reachable stops are 0 mm (fully retracted), 25 mm, 275 mm, and the combined total travel of 300 mm, making it ideal for applications requiring a long primary advance and a short secondary positioning step.
Each 40 mm bore section generates 628 N of push force at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa. The 16 mm diameter piston rod and 21 mm adjustable air cushion at each end provide reliable deceleration. A built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback without external brackets.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 275 / 25 mm |
| Total travel | 300 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) | 275 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 300 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 SCT40X275X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×275 | 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 SCT40X275X25S Is Used
Two-Stage Part Feeding
Advances a component 275 mm from a magazine to a transfer point, then uses the 25 mm stroke for a final gentle push into a nest, preventing impact damage.
Dual-Depth Pressing
Provides a 275 mm rapid approach to a workpiece, followed by a controlled 25 mm press stroke for inserting a bushing to a precise depth.
Sorting Gate Actuation
Uses the 275 mm stroke to open a main diverter gate fully and the 25 mm stroke to hold a secondary deflector lip at a specific angle for mixed product routing.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X275X25S the Right Cylinder?
Choose this SCT model when your machine needs a long 275 mm transfer stroke followed by a precise 25 mm locating or clamping movement, eliminating the complexity of two separate cylinders and their mounting hardware. If the per-section force of 628 N at 0.5 MPa is insufficient, stepping up to the 50 mm bore SCT provides 982 N of push force under the same pressure. For replacement, match the 40 mm bore, both the 275 mm and 25 mm strokes, PT port thread, and the integrated magnet feature to ensure sensor compatibility. With the 275 mm section extended, ensure the load is guided to prevent rod bending from side forces.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 275 + 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 SCT40X275X25S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm, 275 mm, and the total extended length of 300 mm. These are fixed by the two internal piston sections and are not infinitely adjustable.
Yes, it combines a 275 mm stroke and a 25 mm stroke on a single common rod, saving mounting space and simplifying plumbing. Ensure the replacement matches the 40 mm bore, both exact strokes, PT ports, and the -S magnet option if sensors are used.
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