Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 300mm give 4 controllable stop positions across a 425mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1125 mm
- Stroke 2300 mm
- Total travel425 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S
The SCT63X125X300S creates four fixed rod positions—0 mm, 125 mm, 300 mm, and the full 425 mm extension—by pressurizing its two piston sections independently or together. Each 63 mm bore section delivers 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum 0.9 MPa operating pressure, driven through a rigid 20 mm diameter rod.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position confirmation at any of the four stops. The 28 mm air cushion at each end decelerates the 425 mm total travel quietly, and the PT1/4 ports keep plumbing straightforward on standard pneumatic circuits.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 125 / 300 mm |
| Total travel | 425 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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) | 125 mm |
| P2 (section 2) | 300 mm |
| P3 (both extended) | 425 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×300 | 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S Is Used
Two-Stage Part Diverting
Extend to 125 mm to nudge a part onto a bypass lane, then to 425 mm to fully eject it into a reject chute, all from one compact cylinder package.
Sequential Clamping & Stamping
Use the 300 mm stroke for a low-force pre-clamp, then pressurize both sections to drive the full 425 mm for the high-force stamping or crimping operation.
Multi-Lane Conveyor Gate
Control flow to three different lanes by stopping the rod at 125 mm, 300 mm, or full retraction, with sensor feedback at each position via the integrated magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S the Right Cylinder?
Choose this 4-position SCT when a process needs two independent, fixed intermediate stops without the complexity of servo control. The 125 mm and 300 mm strokes give asymmetric spacing ideal for a roughing pass followed by a precision feed. If the 1559 N push per section is marginal, stepping up to the 80 mm bore provides 2513 N at the same 0.5 MPa pressure. For replacement, match an SCT63 with both 125 mm and 300 mm strokes, PT thread, and the -S magnet option; mounting is basic on this unit, so confirm your existing bracket style if one is fitted.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 300 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X300S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 125 mm (section one extended), 300 mm (section two extended), and 425 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, if your original unit has a 63 mm bore, 125 mm and 300 mm strokes, and PT ports. The -S suffix means this cylinder has a built-in magnet for sensors; if your old setup didn't use sensors, the magnet does not interfere with mechanical operation, but you must ensure the added barrel length with the magnet band fits your space.
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