Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 105mm and 20mm give 4 controllable stop positions across a 125mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1105 mm
- Stroke 220 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20
The SCT40X105X20 is a double-acting tandem cylinder that provides four fixed rod positions by combining two piston sections on a common rod line. With stroke1 set to 105 mm and stroke2 to 20 mm, the reachable stops are 0 mm (fully retracted), 20 mm, 105 mm, and the total travel of 125 mm. Each section uses a 16 mm diameter rod and generates 628 N of push force at 0.5 MPa, giving predictable thrust for multi-stop tasks.
This 40 mm bore unit has a body length A of 235 mm and PT1/4 ports. The adjustable end cushion on both sections decelerates the load smoothly at each stop, while the TPU seals suit standard operating temperatures from -20 to +70 °C. The tie-rod construction makes it a robust, serviceable choice for sequencing or diverting applications where two separate cylinders would add bulk and complexity.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 105 / 20 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) | 105 mm |
| P2 (section 2) | 20 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 SCT40X105X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×105 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT40X105X20 Is Used
Two-Stage Part Diverting
Uses the 20 mm and 105 mm stops to route parts to two different conveyor lanes from a single feed point, simplifying the actuator layout.
Sequential Clamping
Applies a light initial clamp at the 20 mm position, then a full-power press at the 105 mm stop, all from one compact tandem cylinder.
Dual-Depth Assembly Stop
Provides a precise 20 mm pre-insertion depth and a 105 mm final seating depth for component assembly, ensuring repeatable cycle quality.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X105X20 the Right Cylinder?
Choose the SCT when your process needs two or more distinct mechanical stops from a single actuator, eliminating the need for two separate cylinders and their mounting hardware. The 40 mm bore provides 628 N of push per section at 0.5 MPa; if you need higher force, stepping up to the 50 mm bore (SCT50) raises per-section push to 982 N at the same pressure. For a lighter load, the 32 mm bore offers 402 N.
A direct replacement must match the 40 mm bore, both strokes (105 mm and 20 mm), PT port thread, and basic mounting. If your original unit includes a magnet for sensors, specify the -S suffix. For strokes over 300 mm, assess side-loading and consider external guides to protect the rod bearing from bending moments.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 105 + 20 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 SCT40X105X20 FAQ
This model provides four discrete positions because the two strokes are different lengths. The rod stops at 0 mm (retracted), 20 mm, 105 mm, and the full combined stroke of 125 mm. You select the position by pressurising one section, the other, or both simultaneously.
Yes, in many cases. A single SCT40X105X20 replaces two individual cylinders and their mounting brackets, saving space and simplifying plumbing. Ensure the replacement matches the 40 mm bore, both stroke lengths (105 mm and 20 mm), PT port thread, and basic mounting style. The per-section force is identical to a standard SC40 cylinder.
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