Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 75mm give 4 controllable stop positions across a 125mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 150 mm
- Stroke 275 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S
The SCT40X50X75S is a tie-rod multi-position cylinder that provides four fixed rod positions by combining two piston sections on a single axis. With strokes of 50 mm and 75 mm, the reachable stops are 0 mm (fully retracted), 50 mm, 75 mm, and the total travel of 125 mm, selected by pressurising either section individually or both together.
Each 40 mm bore section delivers 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 rod and 21 mm adjustable air cushion at each end support smooth deceleration. A built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG sensors to mount directly onto the tie-rod barrel for non-contact position feedback.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 50 / 75 mm |
| Total travel | 125 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) | 50 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 125 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 SCT40X50X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT40X50X75S Is Used
Two-Stage Diverter Gate
Uses the 50 mm and 75 mm stops to route packages to three separate conveyor lanes from one infeed, simplifying multi-lane sortation with a single actuator.
Multi-Depth Pressing
Provides two distinct pressing depths (50 mm and 125 mm total travel) for assembly operations requiring a light pre-set followed by a full insertion stroke.
Staged Clamping Fixture
Positions a clamp at a 50 mm clearance position for part loading, then advances to the 75 mm or full 125 mm stop for secure workholding during machining.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X75S the Right Cylinder?
Choose this 4-position tandem cylinder when a single actuator must index to multiple fixed stops without the complexity of two separate cylinders and external hard stops. The 50 mm and 75 mm strokes give asymmetric positioning ideal for two-stage feeding or sorting. If higher force is needed, stepping up to the 50 mm bore SCT50 series provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, both strokes (50 mm and 75 mm), PT port thread, basic mounting, and the -S magnet option. When a section stroke reaches 300 mm or longer, consider external guides to protect the 16 mm rod from side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 75 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 SCT40X50X75S FAQ
It provides four discrete rod positions: 0 mm (fully retracted), 50 mm (section 1 extended), 75 mm (section 2 extended), and 125 mm (both sections extended, which is the sum of the two strokes).
Yes, in applications needing two fixed intermediate stops on one axis. It replaces two separate cylinders and external stop hardware with a single tandem body. Ensure the replacement matches the 40 mm bore, 50 mm and 75 mm strokes, PT ports, and the -S magnet option if sensor feedback is required.
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