Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 65mm and 50mm give 4 controllable stop positions across a 115mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 165 mm
- Stroke 250 mm
- Total travel115 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S
The SCT50X65X50S is a double-acting multi-position tandem cylinder that delivers four discrete rod positions from a single unit: 0 mm (fully retracted), 50 mm, 65 mm, and 115 mm (total travel). Each 50 mm bore section provides 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa. The built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors for position feedback.
This model uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. The adjustable pneumatic cushion at each end cap is 21 mm long, and the total body length A(SCT) is 243 mm. With unequal strokes, it is ideal for applications requiring two different mid-stroke positions without the complexity of two separate cylinders and external stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 65 / 50 mm |
| Total travel | 115 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, 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) | 65 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 115 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X65X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×65 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT50X65X50S Is Used
Two-Stage Part Sorting
Extends to 50 mm for a primary diverter gate and to 65 mm for a secondary reject lane, with the 115 mm total extension used for a bypass path, all controlled by pressurizing one or both cylinder sections.
Multi-Depth Pressing
Provides three distinct pressing depths (50 mm, 65 mm, and 115 mm) for assembly operations like bearing insertion or gasket compression, where different components require different insertion forces and depths.
Indexing Conveyor Stop
Acts as a three-position stop for pallets on a conveyor line, using the 50 mm and 65 mm extensions to create two separate queuing zones before releasing the pallet at the full 115 mm retraction.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X65X50S the Right Cylinder?
Choose the SCT tandem cylinder when a single rod line must stop at multiple fixed points, eliminating the need for two independent cylinders and the associated mounting hardware. For applications needing higher force, consider stepping up to the 63 mm bore SCT, which provides 1559 N of push per section at 0.5 MPa. If a lower force profile is acceptable, the 40 mm bore version delivers 628 N.
For a direct replacement, match the 50 mm bore, the exact stroke combination of 65 mm and 50 mm, PT port thread, basic mounting, and the -S magnet option. Note that the 65 mm stroke is non-standard; ensure the replacement carries the same made-to-order stroke configuration.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 65 + 50 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 SCT50X65X50S FAQ
This model provides four distinct mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 65 mm (second section extended), and 115 mm (both sections extended for total travel). The unequal strokes create four unique positions, selected by applying pressure to section one, section two, or both simultaneously.
Yes, it is a direct functional replacement that simplifies the machine design. Instead of mounting and aligning two separate SC cylinders with external hard stops, the SCT50X65X50S integrates both strokes onto a single rod line, reducing space, bracketry, and the number of valves required. Ensure the replacement matches the 50 mm bore, both the 65 mm and 50 mm strokes, and the -S magnet option for sensor compatibility.
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