Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 180mm and 120mm give 4 controllable stop positions across a 300mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1180 mm
- Stroke 2120 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S
The SCT100X180X120S is a 100 mm bore multi-position tandem cylinder that delivers four distinct, repeatable rod positions without external stops. By pressurising either of its two piston sections individually or together, the rod locates precisely at 0 mm (fully retracted), 120 mm, 180 mm, or the full combined travel of 300 mm. Each actuated section generates a push force of 3927 N at 0.5 MPa, scaling to 7068 N at the maximum operating pressure of 0.9 MPa.
This model includes a factory-installed magnetic piston ring, designated by the -S suffix, allowing easy attachment of CMSG, DMSG, or EMSG solid-state sensors directly to the tie-rod barrel for non-contact position sensing. The cylinder features a robust 25 mm diameter hard-chrome plated rod with an M20x1.5 male thread, PT1/2 port connections, and a generous 29 mm pneumatic cushion length in each section for effective end-of-stroke deceleration. The body length A(SCT) is 308 mm.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 180 / 120 mm |
| Total travel | 300 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 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) | 180 mm |
| P2 (section 2) | 120 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×180 | Stroke 1 (section 1) in mm. |
| ×120 | 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 SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S Is Used
Multi-Stop Diverter Gate
Positions a diverter chute to four distinct angles for routing packages on a conveyor. The 120 mm and 180 mm strokes set precise gate positions, while the 300 mm total travel provides a full bypass path.
Two-Depth Clamping Fixture
Clamps workpieces at two different depths for a two-step machining process. The rod extends to 120 mm for the first operation and 180 mm for the second, with magnetic sensors confirming each clamp depth before the spindle starts.
Progressive Assembly Press
Inserts a component in two controlled stages: a 120 mm rapid-approach stroke followed by a 60 mm press-fit stroke (achieved by moving from the 120 mm to the 180 mm position). The 3927 N push force at 0.5 MPa handles most light press operations.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S the Right Cylinder?
Selecting this SCT configuration is ideal when an application requires a 180 mm primary stroke and a 120 mm secondary stroke, achieving a total travel of 300 mm with four discrete stopping points. This provides a compact, integrated alternative to using two separate 100 mm bore cylinders with external mechanical stops, reducing alignment complexity and plumbing. The built-in magnet (-S) enables sensor-based sequencing without additional mounting brackets.
If the per-section force requirement is lower, stepping down to an 80 mm bore (SCT80 series) reduces the push force to 2513 N at 0.5 MPa, saving air consumption and physical space. For a direct replacement, match the 100 mm bore, both 180 mm and 120 mm strokes, PT1/2 threads, and the magnetic piston option. For strokes over 300 mm in a single section, consider external guide rods to protect the 25 mm rod from side-load deflection and bending moments.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 180 + 120 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 SCT80~100 Multi-Position Tandem Cylinder SCT100X180X120S FAQ
This cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 120 mm (stroke 2 only), 180 mm (stroke 1 only), and 300 mm (both strokes extended). The positions are fixed by the internal piston strokes and are not infinitely adjustable.
Yes, it is designed to replace two individual cylinders with strokes of 180 mm and 120 mm that were previously used in tandem. The replacement must match the 100 mm bore, PT1/2 ports, and the -S magnetic piston option. The integrated tandem body ensures perfect rod alignment between the two strokes, which is difficult to achieve with two separate cylinders.
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