Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 70mm give 4 controllable stop positions across a 105mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 135 mm
- Stroke 270 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70
The SCT50X35X70 is a double-acting tandem cylinder that provides four fixed rod positions—0 mm, 35 mm, 70 mm, and full extension at 105 mm—by pressurising its two piston sections independently or together. With a 20 mm rod and PT1/4 ports, each section generates 982 N of push force at 0.5 MPa, making it a compact alternative to complex servo setups for discrete stopping tasks.
Built on a rigid tie-rod design with a 243 mm body length, this genuine AirTAC unit includes adjustable air cushioning at both ends for smooth deceleration. The 4-position layout is ideal for diverting parts to two separate lanes or executing a two-depth pressing sequence without needing external hard stops or multiple single-stroke cylinders.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 35 / 70 mm |
| Total travel | 105 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) | 35 mm |
| P2 (section 2) | 70 mm |
| P3 (both extended) | 105 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 SCT50X35X70
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT50X35X70 Is Used
Two-Lane Part Diverting
Use the 35 mm and 70 mm stops to guide products into separate conveyor lanes, achieving reliable sorting with a single actuator.
Two-Depth Pressing
Program a shallow press at 35 mm for pre-forming and a full-depth press at 105 mm for final assembly, all within one machine cycle.
Staged Clamping
Apply a light clamp at the 70 mm position for alignment, then drive to 105 mm for full holding force during machining or welding.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X35X70 the Right Cylinder?
Choose the SCT50X35X70 when your application needs two intermediate positions plus retracted and full-extension stops, all from one compact assembly. It replaces two separate SC50 cylinders and eliminates the need for external brackets and alignment. If your force requirement is lower, the SCT40 series provides 628 N push per section; for heavier loads, the SCT63 delivers 1559 N.
For a direct replacement, match the 50 mm bore, both strokes (35 mm and 70 mm), PT thread, and basic mounting. Note that strokes of 35 mm are non-standard and may require made-to-order lead times. Always confirm the total extended length in your fixture to avoid interference.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 70 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 SCT50X35X70 FAQ
It provides four discrete rod positions: 0 mm (fully retracted), 35 mm (section 1 extended), 70 mm (section 2 extended), and 105 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two single-stroke cylinders in applications requiring two intermediate stops. Ensure the replacement matches the 50 mm bore, 35 mm and 70 mm strokes, PT port thread, and basic mounting. The per-section force (982 N push at 0.5 MPa) is identical to a standard SC50.
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