Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 20mm give 3 controllable stop positions across a 40mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 120 mm
- Stroke 220 mm
- Total travel40 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20
The AirTAC SCT100X20X20 is a double-acting multi-position cylinder that delivers three fixed rod positions—fully retracted (0 mm), 20 mm, and the total travel of 40 mm—by pressurising its two tandem piston sections. With a 100 mm bore, each section generates 3927 N of push force at 0.5 MPa, scaling up to 7068 N at the maximum operating pressure of 0.9 MPa. The cylinder body has a base length of 308 mm and uses a 25 mm diameter piston rod with M20x1.5 male threads.
The tie-rod construction and adjustable end cushioning, with a 29 mm cushion length, provide reliable deceleration for the 25 mm rod. The standard PT1/2 porting and TPU seals suit filtered air systems operating between -20 and +70 °C. This three-stop configuration is ideal for compact diverting gates or two-step clamping fixtures where the intermediate position is exactly half the full stroke.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 20 / 20 mm |
| Total travel | 40 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 20 mm |
| P2 (both extended) | 40 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 SCT100X20X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×20 | 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 SCT100X20X20 Is Used
Two-Way Diverter Gate
Uses the three discrete positions (0, 20, 40 mm) to direct parts into two separate lanes on a conveyor, eliminating the need for a rotary actuator.
Two-Depth Pressing
Provides a consistent 20 mm pre-press position and a 40 mm final pressing depth, ensuring repeatable part contact for assembly or forming operations.
Multi-Stop Clamping
Clamps workpieces of two different thicknesses without manual adjustment, using the 20 mm position for thin parts and the 40 mm position for thicker ones.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20 the Right Cylinder?
Select the SCT100X20X20 when a single cylinder must provide a short, precise two-step linear motion without the complexity of two separate actuators. This model is a direct replacement for an existing AirTAC SCT100X20X20 with PT ports and basic mounting; ensure both stroke sections and the bore match exactly. If the 3927 N push force per section at 0.5 MPa is more than required, consider stepping down to an 80 mm bore, which provides 2513 N per section, to reduce air consumption and physical size.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 20 + 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 SCT100X20X20 FAQ
It provides 3 distinct mechanical stop positions. Because the two strokes are equal (20 mm each), the rod can be positioned at 0 mm (fully retracted), 20 mm (one section extended), and 40 mm (both sections extended, total travel).
Yes, the SCT100X20X20 is designed to replace a back-to-back pair of cylinders for two-position sequencing in a single, compact body. It provides the same 20 mm incremental motion. Ensure the porting (PT1/2) and mounting style match your machine's requirements.
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