
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X220S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 15mm and 220mm give 4 controllable stop positions across a 235mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
The SCT80X15X220S tandem cylinder provides four discrete rod positions—0 mm, 15 mm, 220 mm, and 235 mm total travel—from a single tie-rod body. Each 80 mm bore piston section delivers 2513 N of push force at 0.5 MPa, making it suitable for diverters and two-depth pressing stations that need a short initial step followed by a longer secondary stroke.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for non-contact position feedback at each stop. The 25 mm diameter rod and 28 mm adjustable air cushion at each end manage end-of-stroke deceleration, while the body length A(SCT) of 296 mm keeps the assembly compact for the total travel achieved.
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X220S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 15 / 220 mm |
| Total travel | 235 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 15 mm |
| P2 (section 2) | 220 mm |
| P3 (both extended) | 235 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.
| 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×15 | Stroke 1 (section 1) in mm. |
| ×220 | 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.
The 15 mm stroke brings a marking head into light contact for a serial number, then the 220 mm stroke advances for a deeper forming operation, all from one compact cylinder.
Retract to 0 mm for lane one, extend to 15 mm for lane two, or push to 220 mm to feed a bypass conveyor, giving three active routing positions with sensor confirmation at each.
The first 15 mm stop applies a low-force pre-clamp to square the workpiece; pressurising both sections drives the full 235 mm to lock the part for heavy machining.
Choose the SCT80X15X220S when a single actuator must reach two distinct extended positions without the complexity of two separate cylinders and a bracket. The short 15 mm stroke handles a precise locating or clamping step, while the 220 mm stroke provides the main transfer or pressing motion. If your force requirement is lower, stepping down to the 63 mm bore reduces per-section push to 1559 N at 0.5 MPa, saving air consumption and space.
For replacement, match the 80 mm bore, both strokes (15 mm and 220 mm), the PT port thread, the built-in magnet (-S), and the basic mounting style. Since the combined stroke exceeds 200 mm, evaluate side-loading on the rod; if the load is not guided externally, add a linear guide or rod support to prevent bending and premature seal wear.
Multi-position checklist
This tandem cylinder reaches four discrete positions: 0 mm (fully retracted), 15 mm (section one extended), 220 mm (section two extended), and 235 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, provided the original unit is an AirTAC SCT with an 80 mm bore, 15 mm and 220 mm strokes, PT ports, and the -S magnet option. Verify the mounting style—this is a basic body, so if your existing cylinder uses FA, FB, CA, CB, or LB brackets, you will need to order the matching accessory separately.
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