Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 20mm give 4 controllable stop positions across a 120mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1100 mm
- Stroke 220 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S
The SCT100X100X20S tandem cylinder creates four fixed rod positions—0 mm, 20 mm, 100 mm, and 120 mm total travel—by combining two piston sections on a single 25 mm diameter rod line. Each section delivers 3927 N of push force at 0.5 MPa, scaling to 7068 N at the maximum operating pressure of 0.9 MPa, making it a powerful solution for sequenced clamping or multi-depth pressing.
A built-in magnet allows CMSG, DMSG, or EMSG sensors to mount directly on the tie-rod barrel for end-of-stroke or mid-position confirmation. The cylinder body length is 308 mm, and it uses a PT1/2 port with an M20x1.5 rod thread. The 29 mm adjustable air cushion at each end section helps manage the inertia of heavy tooling during the 120 mm combined stroke.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 100 / 20 mm |
| Total travel | 120 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) | 100 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 120 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 SCT100X100X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×100 | 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 SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S Is Used
Two-Stage Clamping
A 100 mm rapid advance brings the clamp near the part, followed by a controlled 20 mm high-force stroke to secure it, preventing part damage from a full-speed impact.
Multi-Depth Press Fit
Insert a bearing to a 20 mm depth at one station, then advance the full 120 mm to press a second component at the next index, all with one cylinder.
Dual-Stop Part Diverting
A short 20 mm stroke nudges a part onto a bypass lane, while the full 120 mm extension pushes it across a main conveyor, sorting by height or type.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S the Right Cylinder?
Select the SCT100X100X20S when a single actuator must deliver two distinct, repeatable stop positions without the complexity of two separate cylinders and a manifold. The 100 mm and 20 mm strokes provide a long primary advance and a short secondary positioning step, ideal for a two-stage feed. If the 3927 N push force per section at 0.5 MPa exceeds your requirement, stepping down to the 80 mm bore reduces per-section push force to 2513 N. For replacement, match the 100 mm bore, both the 100 mm and 20 mm strokes, the PT1/2 port, and the built-in magnet; this model uses a basic mount, so confirm your existing bracket matches the FA, FB, CA, CB, or LB style if one is fitted.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 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 SCT80~100 Multi-Position Tandem Cylinder SCT100X100X20S FAQ
It provides four discrete rod positions: fully retracted (0 mm), extended by the second section only (20 mm), extended by the first section only (100 mm), and fully extended with both sections (120 mm). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, if your application requires two fixed stops at 100 mm and 120 mm. The SCT100X100X20S consolidates the motion into one tie-rod body, reducing plumbing and mounting hardware. Ensure the replacement matches the 100 mm bore, the 100 mm and 20 mm strokes, the PT1/2 thread, and the built-in magnet for sensor compatibility.
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