Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 75mm give 4 controllable stop positions across a 175mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1100 mm
- Stroke 275 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S
The SCT80X100X75S is a double-acting multi-position cylinder that provides four distinct, repeatable rod positions without external stops. By pressurising the two 80 mm bore sections independently or together, the rod stops precisely at 0 mm (retracted), 100 mm, 75 mm, and the full combined travel of 175 mm. Each section delivers a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback. The 25 mm diameter rod and 28 mm air cushion at each end provide smooth deceleration, while the body length A(SCT) of 296 mm keeps the assembly compact. It operates on standard 40 µm filtered air with PT3/8 ports.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 100 / 75 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) | 100 mm |
| P2 (section 2) | 75 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 SCT80X100X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT80X100X75S Is Used
Two-Way Diverter Gate
Directs packages to one of two conveyor lanes by stopping at 75 mm for lane A and 175 mm for lane B, with the 0 mm and 100 mm positions used for reset and bypass modes.
Multi-Depth Pressing
Performs a two-stage assembly operation: a 75 mm partial insertion stroke followed by a 100 mm final press stroke, with each depth controlled by pressurising a different cylinder section.
Staggered Part Feeding
Feeds components at two different pitches on an automated line. The 100 mm stroke advances a carrier, while the 75 mm stroke indexes a second fixture, creating a combined 175 mm shift.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X75S the Right Cylinder?
Choose the SCT80X100X75S when your process needs four fixed stopping points without the complexity of servo controls or multiple cylinders. This tandem unit is more compact and cost-effective than mounting two separate SC80 cylinders with external hard stops to achieve the same 0, 75, 100, and 175 mm positions. If your force requirement is lower, stepping down to the 63 mm bore SCT63X100X75S reduces the per-section push force to 1559 N at 0.5 MPa. For a direct replacement, match the 80 mm bore, both strokes (100 mm and 75 mm), the PT3/8 port thread, and the integrated magnet (-S). With a total travel of 175 mm, rod bending is not a primary concern, but ensure the load is guided if it applies a significant side force.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 75 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 SCT80X100X75S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 100 mm (section 1 extended), 75 mm (section 2 extended), and 175 mm (both sections extended, total travel). The positions are fixed and discrete, selected by directing air pressure to the appropriate cylinder sections.
To ensure a drop-in replacement, match the 80 mm bore, the exact 100 mm and 75 mm strokes, and the -S magnet option for sensor compatibility. Also verify the PT3/8 port thread and the basic mounting style. The replacement must be another AirTAC SCT80X100X75S to guarantee the same 296 mm body length and 28 mm cushion performance.
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