Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 350mm and 25mm give 4 controllable stop positions across a 375mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1350 mm
- Stroke 225 mm
- Total travel375 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25
The SCT40X350X25 tandem cylinder provides four fixed rod positions by combining two independent piston sections on a single axis. With strokes of 350 mm and 25 mm, the accessible stops are 0 mm (fully retracted), 25 mm, 350 mm, and the total extended travel of 375 mm. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it suitable for multi-stop feeding or sorting tasks that require a long primary stroke and a short secondary positioning step.
This double-acting unit uses a 16 mm diameter rod and PT1/4 ports, with a body length A(SCT) of 235 mm. The adjustable pneumatic end cushion on each section decelerates the piston smoothly, though the cushion does not lock the load. For applications where the 350 mm stroke section is extended under a side load, external guides are recommended to protect the rod bearing from bending moments.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 350 / 25 mm |
| Total travel | 375 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) | 350 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 375 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 SCT40X350X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×350 | 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 SCT40X350X25 Is Used
Two-Stage Part Feeding
A 350 mm stroke advances a part from a magazine, and a final 25 mm stroke pushes it precisely into a nest or fixture, achieving a total 375 mm reach with two distinct feed positions.
Dual-Depth Sorting Gate
The rod positions at 0, 25, 350, and 375 mm direct items to four different lanes on a conveyor, using the short 25 mm stroke for fine lane selection after the long travel.
Long-Reach Clamping with Fine Adjustment
The 350 mm stroke rapidly closes a clamp to near-contact, and the 25 mm stroke applies the final controlled clamping force without overshoot, protecting delicate assemblies.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X350X25 the Right Cylinder?
Choose this 4-position tandem cylinder when your process needs a long 350 mm transfer stroke plus a precise 25 mm secondary shift, eliminating the complexity of two separate cylinders and their mounting brackets. The SCT40X350X25 is a direct replacement for an existing AirTAC SCT of the same 40 mm bore, 350 mm and 25 mm strokes, PT ports, and basic mounting configuration. If the 628 N push force per section at 0.5 MPa is insufficient, stepping up to the 50 mm bore SCT50X350X25 provides 982 N per section, while a step down to 32 mm offers 402 N. When the 350 mm stroke section is fully extended, ensure the rod is not subjected to high radial loads; use a guide rail or rod support to prevent premature seal wear and bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 350 + 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 SCT40X350X25 FAQ
This 4-position cylinder stops at 0 mm (retracted), 25 mm, 350 mm, and 375 mm (total travel). The positions are discrete and selected by pressurizing either the 350 mm section, the 25 mm section, or both together.
Yes, it replaces a pair of 40 mm bore cylinders with 350 mm and 25 mm strokes that were used in series to achieve the same four positions. It simplifies mounting, reduces air plumbing, and ensures the rod line is inherently aligned. The replacement must match the 40 mm bore, both strokes, PT ports, and basic mounting.
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