Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 25mm give 4 controllable stop positions across a 125mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1100 mm
- Stroke 225 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S
The SCT63X100X25S is a double-acting multi-position tandem cylinder that provides four distinct mechanical stops along its stroke: 0 mm (fully retracted), 25 mm, 100 mm, and the combined total travel of 125 mm. This is achieved by independently pressurizing the two piston sections on a common 20 mm diameter rod, with each section delivering a push force of 1559 N at 0.5 MPa—rising to 2805 N at the maximum operating pressure of 0.9 MPa.
Equipped with a built-in magnet (denoted by the -S suffix), this model allows for direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the tie-rod barrel for non-contact position sensing. The cylinder body has a length of 249 mm and features an adjustable pneumatic cushion of 28 mm at each end, ensuring smooth deceleration of the load across all four positions.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 100 / 25 mm |
| Total travel | 125 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) | 100 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 125 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 SCT63X100X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT63X100X25S Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 100 mm stops to divert packages to two separate conveyor lanes from a single retracted home position, with the 125 mm full-extension acting as a third reject lane.
Multi-Depth Pressing
Provides two controlled pressing depths at 25 mm and 100 mm for assembling components with different insertion forces, using the 125 mm total travel for part ejection.
Sequential Clamping Fixture
The 25 mm stroke applies a light initial clamp to position a delicate part, followed by the 100 mm stroke for full clamping force, with sensors confirming each discrete position.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X25S the Right Cylinder?
This 4-position cylinder is ideal when an application requires two distinct extended positions plus a retracted home and a full-extension stop, eliminating the complexity and cost of two separate cylinders with external hard stops. For higher force requirements, consider stepping up to the 80 mm bore SCT80 series, which provides 2513 N of push per section at 0.5 MPa. If a lower force is sufficient, the 50 mm bore SCT50 series offers 982 N.
A direct replacement must match the 63 mm bore, both section strokes of 100 mm and 25 mm, PT port threads, and the basic mounting configuration. The -S magnet suffix is critical for drop-in sensor compatibility. Given the 100 mm stroke on the first section, ensure the rod is adequately guided if significant side loads are present to prevent bending or premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 25 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 SCT63X100X25S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), 100 mm (second section extended), and 125 mm (both sections extended for total travel).
The SCT tandem cylinder integrates two piston sections on a single common rod, achieving three or four fixed positions from one compact, tie-rod assembly. This eliminates the need for complex bracketry, external hard stops, and dual mounting alignments required when linking two separate cylinders to achieve the same multi-stop functionality.
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