Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 300mm and 350mm give 4 controllable stop positions across a 650mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1300 mm
- Stroke 2350 mm
- Total travel650 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S
The SCT40X300X350S is a double-acting multi-position cylinder that delivers four discrete rod positions by combining two strokes on a single piston rod. With a 300 mm stroke on the front section and 350 mm on the rear, the available stops are 0 mm (fully retracted), 300 mm, 350 mm, and 650 mm (total travel). The built-in magnet allows direct mounting of CMSG/DMSG sensors for position feedback at each stop.
Each 40 mm bore piston 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 cylinder uses a 16 mm diameter rod with M12x1.25 threads and PT1/4 ports. Its tie-rod body has a base length of 235 mm, and the adjustable air cushion at each end provides a 21 mm deceleration zone for smooth stopping even under high cycle rates.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 300 / 350 mm |
| Total travel | 650 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) | 300 mm |
| P2 (section 2) | 350 mm |
| P3 (both extended) | 650 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 SCT40X300X350S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×300 | Stroke 1 (section 1) in mm. |
| ×350 | 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 SCT40X300X350S Is Used
Two-Stop Diverter Gate
Uses the 300 mm and 350 mm positions to route products to two separate conveyor lanes from a single infeed point, controlled by pressurising each section independently.
Multi-Depth Insertion
Drives a tool to two distinct insertion depths (300 mm and 350 mm) for assembling components with stepped bores, with sensor confirmation at each position via the built-in magnet.
Pallet Stop and Release
Positions a stop blade at 300 mm to halt a pallet for processing, then extends to 350 mm to release it onto a lower conveyor, using the 650 mm total stroke for a clear retracted home.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X300X350S the Right Cylinder?
This four-position SCT is a compact alternative to installing two separate cylinders with external hard stops for a two-step sequence. The 300 mm and 350 mm strokes create a 650 mm total reach, making it suitable for palletising heads or multi-depth pressing tools. If your load requires more thrust, stepping up to a 50 mm bore provides 982 N of push per section at the same 0.5 MPa pressure.
For a drop-in replacement, match the 40 mm bore, both strokes (300 mm and 350 mm), PT port thread, and the -S magnet option. Since the front stroke extends to 300 mm, evaluate the rod for side loading; a guide rod or external linear bearing is recommended if the tooling applies off-axis forces at full extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 300 + 350 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 SCT40X300X350S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 300 mm (front section extended), 350 mm (rear section extended), and 650 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT uses two piston sections inside a single body. Each section produces the same force as a standard SC40 cylinder—628 N push at 0.5 MPa. The two sections do not add their force together for a single push; you get the same 628 N whether extending one section or both. The advantage is achieving multiple fixed stops without the alignment complexity of two separate actuators.
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