Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 100mm give 4 controllable stop positions across a 175mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 175 mm
- Stroke 2100 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S
The SCT80X75X100S is an AirTAC multi-position tandem cylinder that provides four fixed rod positions: 0 mm (fully retracted), 75 mm, 100 mm, and the combined total travel of 175 mm. This discrete stopping capability is achieved by independently pressurising its two 80 mm bore piston sections, each delivering a push force of 2513 N at 0.5 MPa (4523 N at 0.9 MPa). The cylinder body has a rigid tie-rod construction with an A(SCT) dimension of 296 mm and a 25 mm diameter rod.
A built-in magnet (denoted by the -S suffix) is integrated into the piston, allowing CMSG, DMSG, or EMSG solid-state and reed sensors to be clamped directly onto the barrel for non-contact position sensing. Operating on filtered air with PT1/8 ports, this double-acting unit uses adjustable pneumatic cushioning with a 28 mm cushion length to manage end-of-stroke deceleration. The standard TPU seals suit a temperature range of -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 75 / 100 mm |
| Total travel | 175 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) | 75 mm |
| P2 (section 2) | 100 mm |
| P3 (both extended) | 175 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 SCT80X75X100S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT80X75X100S Is Used
Two-Stage Diverter Gate
Operates a conveyor diverter with a partial-open position at 75 mm for sorting small items and a full-open position at 175 mm for large packages, using the intermediate 100 mm stop for a secondary chute alignment.
Multi-Depth Pressing
Provides three distinct pressing depths in a light assembly fixture. The 75 mm stroke sets a pre-clamp, the 100 mm stroke applies a forming pressure, and the full 175 mm travel ejects the finished part.
Sequential Part Feeding
Advances a workpiece through three stations on a pallet system. The first 75 mm movement separates a part from a stack, the 100 mm stroke transfers it to a wash station, and the full 175 mm extension delivers it to the pick point.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X100S the Right Cylinder?
Select the SCT80X75X100S when your process requires a single, compact actuator to reliably index between four distinct positions instead of using two separate cylinders with external stops. This simplifies plumbing and control logic for sequences like a two-step push-and-hold. If your application demands higher force, stepping up to the 100 mm bore SCT100 series provides 3927 N of push per section at 0.5 MPa. For a direct replacement, ensure the alternative matches the 80 mm bore, both stroke sections (75 mm and 100 mm), PT port thread, basic mounting, and the integrated magnet for sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 100 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 SCT80X75X100S FAQ
This tandem cylinder provides four discrete mechanical stops at 0 mm (fully retracted), 75 mm, 100 mm, and the full combined travel of 175 mm. The positions are fixed by the two stroke lengths and are selected by pressurising either the first section, the second section, or both simultaneously.
The SCT unit integrates both strokes onto a single common rod line, which guarantees coaxial alignment between the two movements and reduces the overall footprint. It eliminates the need for a complex mounting bracket to couple two independent cylinders, simplifying the machine design and reducing the number of valves required for sequential operation.
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