
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X10S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 10mm and 10mm give 3 controllable stop positions across a 20mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
The SCT40X10X10S is a tandem multi-position cylinder that delivers three fixed rod positions: fully retracted (0 mm), mid-stop (10 mm), and full extension (20 mm). Each piston section generates 628 N of push force at 0.5 MPa, driven by a 16 mm diameter hard-chrome-plated rod through PT1/4 ports.
A built-in magnet (suffix -S) is integrated into the piston, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The cylinder body has a length of 235 mm and features an adjustable air cushion of 21 mm at each end for smooth deceleration.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X10S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 10 / 10 mm |
| Total travel | 20 mm |
| Stop positions | 3 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 10 mm |
| P2 (both extended) | 20 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×10 | Stroke 1 (section 1) in mm. |
| ×10 | 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.
Shifts a small diverter gate between a neutral center position and two distinct routing paths at 10 mm and 20 mm of travel, ideal for tight packaging lines.
Provides a light pre-ejection push at the 10 mm mid-stop before a final 20 mm stroke, preventing damage to delicate electronic components during removal from nests.
Uses the built-in magnet and external sensors at the 10 mm position to confirm a part is seated before the cylinder completes the full 20 mm clamping stroke.
This 3-position SCT model is ideal when a compact, short-stroke actuator must index between two precise extended positions without the complexity of two separate cylinders. If higher force is needed, stepping up to the 50 mm bore SCT50 series provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 10 mm strokes, the PT port thread, and the -S magnet option. The basic mounting configuration allows the cylinder body to be rigidly fixed using the standard tie-rod nuts.
Multi-position checklist
This tandem cylinder provides 3 discrete mechanical stops. Because both stroke sections are equal (10 mm each), the reachable rod positions are 0 mm (retracted), 10 mm (first section extended), and 20 mm (both sections extended).
Yes, the -S suffix indicates a built-in magnetic ring. You can mount CMSG (reed) or DMSG/EMSG (solid-state) sensors directly on the cylinder's tie-rod barrel to detect the piston's position at any of the three stops.
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