
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X133X77 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 133mm and 77mm give 4 controllable stop positions across a 210mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
The SCT32X133X77 tandem cylinder delivers four fixed rod positions—0 mm, 77 mm, 133 mm, and the full 210 mm extension—by pressurising its two 32 mm bore sections independently or together. Each piston section generates 402 N of push force at 0.5 MPa, making it suitable for light sorting or diverting tasks where multiple mechanical stops are needed without complex controls.
Built on a tie-rod body with a 233 mm base length, this model uses a 12 mm diameter rod with M10x1.25 threads and PT1/8 ports. The 21 mm adjustable air cushion at each end section helps manage end-of-stroke impact. The discrete stop positions are fixed by the 133 mm and 77 mm strokes, providing repeatable mechanical registration points.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X133X77 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 133 / 77 mm |
| Total travel | 210 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) | 133 mm |
| P2 (section 2) | 77 mm |
| P3 (both extended) | 210 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). |
| ×133 | Stroke 1 (section 1) in mm. |
| ×77 | 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.
Actuates a diverter gate to four distinct positions (0, 77, 133, 210 mm) for routing packages or parts to different conveyor lanes based on barcode or weight signals.
Provides two controlled pressing depths (77 mm and 133 mm) plus full retraction and full extension, allowing a single station to handle two different assembly insertion depths.
Advances components in three precise increments from a magazine: a 77 mm partial feed, a 133 mm full feed, and a 210 mm total stroke to clear the nest, all from one compact actuator.
Choose the SCT when a single actuator must reach multiple fixed positions without the cost and complexity of two separate cylinders and external hard stops. The 133 mm and 77 mm stroke combination creates four distinct stopping points, ideal for multi-stage feeding or gate selection. If higher force is needed, stepping up to the 40 mm bore provides 628 N of push per section at the same 0.5 MPa pressure.
For replacement, match the 32 mm bore, both the 133 mm and 77 mm strokes, PT port thread, and basic mounting. If your application requires position sensing, specify the -S magnet option to use CMSG or DMSG sensors. For strokes over 300 mm, consider external guides to protect the 12 mm rod from side loads.
Multi-position checklist
It provides 4 discrete mechanical stop positions: 0 mm (fully retracted), 77 mm (stroke 2 only), 133 mm (stroke 1 only), and 210 mm (both strokes extended). The positions are fixed by the two section strokes and are not infinitely adjustable.
Yes, if your sequence requires moving a load to 77 mm and 133 mm stops. The SCT32X133X77 integrates both strokes on one common rod line, saving space and eliminating the need to synchronise two separate actuators. Ensure the replacement matches the 32 mm bore, both strokes, PT ports, and basic mounting.
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