Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 100mm give 4 controllable stop positions across a 125mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 2100 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100
The SCT40X25X100 is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 100 mm, and the combined total travel of 125 mm. Each 40 mm bore section generates 628 N of push force and 528 N of pull force at 0.5 MPa, making it suitable for light sorting or diverting tasks where two distinct extended stops are required.
This tie-rod cylinder uses a 16 mm diameter piston rod with an M12x1.25 rod thread and PT1/4 ports. The adjustable air cushion at each end cap has a cushion length of 21 mm, and the overall body length A(SCT) is 235 mm. Operating pressure ranges from 0.15 to 1.0 MPa with a maximum push thrust of 1130 N per section at 0.9 MPa.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 100 mm |
| Total travel | 125 mm |
| Stop positions | 4 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.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (section 2) | 100 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 (Ø40mm)
| 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.
Model Code: Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT40X25X100 Is Used
Two-Position Diverter Gate
Use the 25 mm stroke to divert lightweight packages to a primary lane and the 100 mm stroke to push them fully onto a secondary conveyor, achieving two distinct sort destinations from one actuator.
Dual-Depth Label Press
Apply a low-force tack at the 25 mm position and a full-pressure bond at the 125 mm total travel position, ensuring precise pressure control for delicate or layered materials.
Step-Feed Assembly Station
Advance a component carrier by 25 mm for an inspection step, then extend to the full 125 mm for a pick-and-place handoff, replacing two single-stroke cylinders with one tandem unit.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X100 the Right Cylinder?
Select the SCT tandem cylinder when your application needs a compact actuator that can stop at two different extended positions without external hard stops. The 25 mm and 100 mm strokes provide a short and a long reach from a single unit, eliminating the complexity of mounting two separate cylinders in series. For higher force, step up to the 50 mm bore, which provides 982 N of push force per section at 0.5 MPa; for a lighter load, the 32 mm bore offers 402 N.
A direct replacement must match the 40 mm bore, both the 25 mm and 100 mm section strokes, PT port thread, and the basic mounting configuration. If you require magnetic piston sensing for end-of-stroke or mid-position confirmation, specify the -S suffix to add a built-in magnet compatible with CMSG/DMSG sensors.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 100 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 SCT40X25X100 FAQ
It 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). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, in applications requiring two distinct extended positions. It replaces the need for two separate cylinders with external hard stops, but the replacement must match the 40 mm bore, the exact 25 mm and 100 mm strokes, PT port thread, and basic mounting. Force output remains per-section, not doubled.
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