Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 100mm give 4 controllable stop positions across a 350mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1250 mm
- Stroke 2100 mm
- Total travel350 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S
The SCT40X250X100S tandem cylinder delivers four fixed rod positions—0, 100, 250, and 350 mm—from two independently controlled piston sections on a single 16 mm rod line. Each 40 mm bore section generates 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), making it a compact alternative to complex multi-actuator setups for sequenced stopping tasks.
A built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for end-of-stroke or intermediate position confirmation. The cylinder body has an A-length of 235 mm plus strokes, uses PT1/4 ports, and includes an adjustable air cushion with a 21 mm cushion length to decelerate the piston smoothly at each stop.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 250 / 100 mm |
| Total travel | 350 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) | 100 mm |
| P3 (both extended) | 350 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 SCT40X250X100S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT40X250X100S Is Used
Two-Way Diverter Gate
Use the four positions to direct product flow to two separate lanes with an intermediate home position, simplifying conveyor routing with a single actuator.
Multi-Depth Pressing
Achieve two distinct pressing depths (100 mm and 350 mm) plus a retracted home and an intermediate 250 mm clearance position for tool-changing in a compact assembly cell.
Staged Part Feeding
Sequence a part escapement with a 100 mm pre-feed, a 250 mm main advance, and a 350 mm full-extend position to separate and deliver components from a magazine.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X100S the Right Cylinder?
Choose this SCT when your process needs four distinct linear positions without the cost and plumbing of two separate cylinders and external hard stops. The 250 mm section provides a long primary travel, while the 100 mm section adds a secondary offset, giving you a 350 mm total stroke. If the 628 N push per section at 0.5 MPa is insufficient, stepping up to the 50 mm bore SCT50 series provides 982 N per section at the same pressure. For replacement, match the 40 mm bore, both 250 mm and 100 mm strokes, PT port thread, basic mounting, and the -S magnet option to retain sensor compatibility. With a 250 mm section stroke, ensure the rod is guided externally if significant side loads are present to prevent bending and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 100 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 SCT40X250X100S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 100 mm (section 2 extended), 250 mm (section 1 extended), and 350 mm (both sections extended). The positions are selected by pressurizing the two piston sections individually or together.
Yes, it is designed for exactly that. The SCT40X250X100S integrates two strokes on one common rod, eliminating the need to align and plumb two separate actuators. Ensure the replacement matches the 40 mm bore, 250 mm and 100 mm strokes, PT ports, and the -S magnet option for sensor feedback.
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