Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 175mm give 4 controllable stop positions across a 300mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1125 mm
- Stroke 2175 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S
The SCT40X125X175S tandem cylinder delivers four fixed rod positions—0 mm, 125 mm, 175 mm, and full 300 mm travel—by combining two piston sections on a common 16 mm rod. Each section independently generates 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), giving machine designers a compact way to sequence two distinct extend strokes without external hard stops.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly to the tie-rod barrel for non-contact position sensing. With a body length A of 235 mm and 21 mm of adjustable air cushion at each stroke end, it handles the inertial loads of rapid cycling up to 800 mm/s while maintaining repeatable stop accuracy.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 125 / 175 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) | 125 mm |
| P2 (section 2) | 175 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 SCT40X125X175S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×175 | 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 SCT40X125X175S Is Used
Two-Stage Part Diverting
Extend to 125 mm for a primary diverter gate and to 175 mm for a secondary reject lane, all from one compact cylinder body with sensor-confirmed position feedback.
Sequential Clamping
Apply a light 125 mm clamp stroke for alignment, then drive to the full 175 mm position for high-force holding, using the intermediate stop to protect delicate workpieces.
Dual-Depth Pressing
Perform a 125 mm pre-form stroke and a 175 mm final-form stroke in a single cycle, with the magnet-equipped barrel enabling precise end-of-stroke sensor confirmation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X175S the Right Cylinder?
Choose the SCT40X125X175S when your process needs two different extend lengths from one actuator—for example, a 125 mm primary feed and a 175 mm secondary push—avoiding the cost and plumbing of two separate cylinders. If you need higher force, stepping up to the 50 mm bore provides 982 N of push per section at the same 0.5 MPa. For a direct replacement, match the 40 mm bore, both strokes (125 mm and 175 mm), the PT port thread, and the built-in magnet; the basic mounting style fits existing tie-rod footprints. With the longer 175 mm section, ensure the rod is guided if side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 175 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 SCT40X125X175S FAQ
It provides four discrete mechanical stops: fully retracted (0 mm), first section extended (125 mm), second section extended (175 mm), and both sections extended for the total 300 mm travel. Because the two strokes differ, you get four unique positions, not three.
Yes, if your sequence requires two fixed extend lengths from a single mounting point. The SCT40X125X175S combines both strokes on one rod line with a single body length A of 235 mm. Ensure the replacement matches the 40 mm bore, 125 mm and 175 mm strokes, PT ports, and the -S magnet option for sensor compatibility.
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