Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 20mm give 4 controllable stop positions across a 60mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 220 mm
- Total travel60 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB
The SCT80X40X20CB is an 80 mm bore multi-position pneumatic cylinder that delivers four distinct rod positions from its tandem piston layout. By pressurising one or both sections, the rod stops precisely at 0 mm (fully retracted), 20 mm, 40 mm, and the total extended travel of 60 mm. Each actuated section generates 2513 N of push force at 0.5 MPa, giving predictable thrust for sequenced operations.
This model is equipped with a rear double clevis (CB) mount, allowing the cylinder body to pivot during actuation for applications with angular movement. The 25 mm diameter rod and PT3/8 ports handle air flow efficiently, while the 28 mm adjustable air cushion at each end section decelerates the piston smoothly. The body length A(SCT) is 296 mm, providing a compact footprint for its multi-stop capability.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 20 mm |
| Total travel | 60 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| 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, 28 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) | 40 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 60 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SCT80X40X20CB
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | 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 SCT80X40X20CB Is Used
Two-Stage Sorting Gate
The four positions (0, 20, 40, 60 mm) direct parts to three separate lanes. Retracted is the home lane, while the 20 mm and 40 mm stops align with two diverter chutes, and full extension at 60 mm sends oversized items to a reject bin.
Multi-Depth Press Insertion
Installs bushings or pins to two controlled depths in a single cycle. The 20 mm stroke sets the first component flush, and the 40 mm stroke presses a second, taller bushing. The CB mount allows the cylinder to pivot for angled part loading.
Sequential Part Staging
Advances a workpiece through three fixed positions on a linear slide. The 20 mm and 40 mm stops move the part between a drilling station and a tapping station, with the 60 mm total travel ejecting the finished component onto an exit conveyor.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X20CB the Right Cylinder?
Choosing the SCT80X40X20CB over two separate cylinders or an SC series unit with external hard stops simplifies the circuit and reduces the footprint for a four-position task. The 40 mm and 20 mm strokes are standard, keeping lead times short. If the 2513 N per-section push force at 0.5 MPa is more than required, the 63 mm bore SCT offers 1559 N per section, while stepping up to the 100 mm bore provides 3927 N per section. For replacement, match the 80 mm bore, both the 40 mm and 20 mm strokes, PT port thread, and the CB rear double clevis mounting. For strokes over 300 mm, consider external guides, but at these short travels, rod bending is not a concern.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 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 SCT80X40X20CB FAQ
This tandem cylinder provides four discrete stop positions because its two section strokes are different (40 mm and 20 mm). The rod can be positioned at 0 mm (fully retracted), 20 mm, 40 mm, and the total travel of 60 mm by pressurising the appropriate air ports.
The CB suffix specifies a rear double clevis bracket. This fork-style mount attaches to the cap end, allowing the cylinder body to pivot. It is ideal for applications where the rod must follow an arc or where the load is guided and the cylinder needs to self-align.
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