
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 100mm give 4 controllable stop positions across a 135mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
The SCT32X35X100S is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 35 mm, 100 mm, and the total extended length of 135 mm. This is achieved by independently pressurizing two piston sections on a common 12 mm diameter rod, giving you a compact solution for tasks requiring two distinct working strokes without complex servo controls.
Each piston section generates 402 N of push force at 0.5 MPa, with a maximum thrust of 724 N per section at the 0.9 MPa operating limit. The cylinder body has a length of 233 mm plus strokes, uses PT1/8 ports, and features an adjustable pneumatic cushion of 21 mm. The integrated magnet allows direct mounting of CMSG or DMSG sensors to confirm each discrete stop position.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X35X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 35 / 100 mm |
| Total travel | 135 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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, 21 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) | 35 mm |
| P2 (section 2) | 100 mm |
| P3 (both extended) | 135 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 | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×35 | 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.
Use the 35 mm stroke to nudge a product into an inspection lane, and the full 135 mm stroke to divert rejects into a separate chute, all from one compact actuator.
Apply a label at the 100 mm extended position for a standard package, then retract to the 35 mm stop for a shallower box, with sensors confirming each position via the built-in magnet.
Clamp a thin workpiece with the first 35 mm section, then advance to 100 mm for a thicker part, using the 21 mm cushion to decelerate the 402 N push force quietly at each stop.
Choose the SCT32X35X100S when your application needs two separate, repeatable extension distances from a single tie-rod assembly. This model is a direct alternative to using two individual SC32 cylinders with external hard stops, saving space and simplifying pneumatic circuitry. For higher force requirements, consider stepping up to the SCT40 series, where each section provides 628 N of push at 0.5 MPa.
As a direct replacement part, match the 32 mm bore, both the 35 mm and 100 mm strokes, the PT port thread, and the built-in magnet. This model uses a basic mount configuration, so ensure your machine frame can accommodate the tie-rod body and rod-end connection. For strokes over 300 mm, assess the rod for potential buckling, but this model's short combined stroke is inherently rigid.
Multi-position checklist
This tandem cylinder provides four discrete positions: 0 mm (fully retracted), 35 mm, 100 mm, and 135 mm (35+100). You select the position by pressurizing the first section, the second section, or both simultaneously. It is not a freely programmable servo axis.
No. The SCT32X35X100S does not have a mechanical lock or brake. If air pressure is exhausted or a valve centers, the piston can drift. To hold a load safely at any intermediate position without live pressure, you must add an external rod brake or a pilot-operated check valve in the circuit.
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