Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 85mm and 15mm give 4 controllable stop positions across a 100mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 185 mm
- Stroke 215 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15
The SCT50X85X15 is a tandem multi-position cylinder that delivers four fixed rod positions from two strokes on a common axis: 0 mm (fully retracted), 15 mm, 85 mm, and the total travel of 100 mm. Each 50 mm bore section generates 982 N of push force and 825 N of pull force at 0.5 MPa, with thrust rising to 1767 N at the maximum operating pressure of 0.9 MPa.
Built on a rugged tie-rod design with a 20 mm diameter piston rod and PT1/4 ports, this cylinder uses a standard TPU seal for reliable service between -20 and +70 °C. The adjustable pneumatic cushion at each end (21 mm cushion length) decelerates the load smoothly, while the fixed body length of 243 mm simplifies machine layout. This genuine AirTAC unit offers a compact alternative to mounting two separate cylinders for two-stop sequences.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 85 / 15 mm |
| Total travel | 100 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) | 85 mm |
| P2 (section 2) | 15 mm |
| P3 (both extended) | 100 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 SCT50X85X15
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×85 | Stroke 1 (section 1) in mm. |
| ×15 | 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 SCT50X85X15 Is Used
Two-Position Sorting Gate
Use the 15 mm and 85 mm stops to divert parts to two separate chutes from a single conveyor line, switching between positions by pressurizing the short or long stroke section.
Dual-Depth Pressing
Achieve a shallow 15 mm pre-press and a deeper 85 mm final forming stroke in a single compact actuator, eliminating the need for a two-stage tooling setup.
Staged Clamping Fixture
The rod advances 15 mm to lightly locate a part, then extends to the full 100 mm to apply clamping force, protecting delicate components from initial impact.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X85X15 the Right Cylinder?
Choose the SCT when your process needs two distinct extension stops without the complexity of external hard stops or multiple actuators. The 50 mm bore is a balanced mid-range choice; if you need more force, stepping up to a 63 mm bore provides 1559 N of push per section at 0.5 MPa, while a 40 mm bore delivers 628 N for lighter, faster-cycling loads. For direct replacement, match the 50 mm bore, both the 85 mm and 15 mm strokes, PT port thread, and basic mounting configuration exactly.
Because the 85 mm stroke section is relatively short, rod bending is rarely a concern under axial loads, but always align the load to prevent side-loading the 20 mm rod and its bearing.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 85 + 15 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 SCT50X85X15 FAQ
It provides four discrete mechanical stops: 0 mm (retracted), 15 mm, 85 mm, and the combined total of 100 mm. These are fixed by the two section strokes and are not infinitely adjustable.
Yes, it is designed specifically for that purpose. It saves space and simplifies plumbing compared to two separate cylinders with external stops, provided the 50 mm bore, 85 mm and 15 mm strokes, and PT ports match your requirements.
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