Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 300mm give 4 controllable stop positions across a 325mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 125 mm
- Stroke 2300 mm
- Total travel325 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S
The SCT63X25X300S is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 300 mm, and the combined total travel of 325 mm. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the 0.9 MPa maximum operating pressure, making it suitable for diverting or sorting tasks that require a short intermediate stop and a longer primary stroke.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for non-contact position feedback. The 20 mm diameter piston rod with M16x1.5 male threads and PT1/4 ports handles side loads from the 300 mm section, while the 28 mm adjustable air cushion at each end cap decelerates the mass smoothly at both extremes of the total 325 mm travel.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 25 / 300 mm |
| Total travel | 325 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) | 25 mm |
| P2 (section 2) | 300 mm |
| P3 (both extended) | 325 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 SCT63X25X300S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT63X25X300S Is Used
Two-Way Part Diverting
Use the 25 mm stop to nudge parts onto a bypass lane and the full 325 mm extension to push rejects into a scrap chute, controlling both paths with one cylinder.
Multi-Depth Stop Gate
The 25 mm position acts as a low-flow metering gate, while the 300 mm stroke fully opens the chute for bulk discharge, with sensors confirming each discrete position.
Two-Stage Clamping Fixture
Advance the rod 25 mm for a light pre-clamp to align a part, then apply the full 300 mm stroke for high-force holding at 2805 N (0.9 MPa) during machining.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X300S the Right Cylinder?
Choose the SCT63X25X300S when your process needs a short 25 mm positioning step and a longer 300 mm transfer stroke from a single compact assembly, avoiding the complexity and plumbing of two separate cylinders with external hard stops. If the 1559 N push force per section at 0.5 MPa is insufficient, stepping up to the 80 mm bore provides 2513 N per section; for a lighter load, the 50 mm bore delivers 982 N. The built-in magnet eliminates the need for external flag brackets, keeping the sensor installation clean.
For direct replacement, match the 63 mm bore, both the 25 mm and 300 mm section strokes, PT port thread, basic mounting, and the -S magnet option. Because the 300 mm stroke section is extended, ensure the rod is guided externally or the load is centered to prevent rod bending and premature bushing wear during the long extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 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 SCT63X25X300S FAQ
This tandem cylinder has four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section 1 extended), 300 mm (section 2 extended), and 325 mm (both sections extended). The positions are fixed by the piston strokes and are not infinitely adjustable.
The SCT integrates both strokes into a single tie-rod body with one common rod, saving mounting space and eliminating the need to synchronize two separate cylinders. You get the same 1559 N push force per actuated section at 0.5 MPa, but with fewer fittings, brackets, and alignment steps. The built-in magnet also simplifies adding sensors compared to rigging external flags on two independent cylinders.
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