Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 75mm give 4 controllable stop positions across a 125mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 150 mm
- Stroke 275 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S
The SCT50X50X75S is a double-acting multi-position cylinder that provides four distinct rod positions—0 mm (fully retracted), 50 mm, 75 mm, and the total travel of 125 mm—by pressurising one or both of its tandem piston sections. Each 50 mm bore section delivers a push force of 982 N at 0.5 MPa, making the unit suitable for sorting gates or two-depth pressing stations where intermediate stops must be repeatable and purely pneumatic.
This model includes a built-in magnet, allowing standard CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position feedback. The 20 mm diameter piston rod and 21 mm adjustable air cushion at each end help manage end-of-stroke impact, while the body length A of 243 mm keeps the assembly compact for its 125 mm total stroke capability.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 50 / 75 mm |
| Total travel | 125 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) | 50 mm |
| P2 (section 2) | 75 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 (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 SCT50X50X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT50X50X75S Is Used
Four-Position Diverter Gate
Direct packages to four separate conveyor lanes by stopping the gate at 0, 50, 75, or 125 mm. The magnet-equipped barrel allows sensors to confirm each discrete position before the next transfer cycle begins.
Two-Depth Pressing or Staking
Perform a shallow 50 mm pre-press and a deeper 75 mm final set, with a 125 mm full-retract for part loading. The pneumatic stops are fixed and repeatable, eliminating the need for manual depth adjustments.
Multi-Stop Part Feeding
Advance components to three different workstations along a linear slide. The 50 mm and 75 mm intermediate positions align with drilling, tapping, and inspection heads, while the 125 mm total stroke clears the part for ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X50X75S the Right Cylinder?
Choose the SCT50X50X75S when a single actuator must reliably hit four fixed positions without the complexity of servo control or multiple cylinders. For lighter loads, stepping down to a 40 mm bore reduces per-section push force to 628 N at 0.5 MPa; for heavier tooling, the 63 mm bore provides 1559 N per section. The 50 mm and 75 mm strokes are standard, so lead times remain short.
This cylinder is a direct replacement only for an identical AirTAC SCT50X50X75S with the magnet option and PT ports. If your application involves a long overhang at the 125 mm total extension, consider an external guide or rod support to prevent side-load induced bending, as the tie-rod construction is not designed to absorb high transverse forces.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 75 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 SCT50X50X75S FAQ
It provides four discrete rod positions: 0 mm (fully retracted), 50 mm (section one extended), 75 mm (section two extended), and 125 mm (both sections extended). The stops are fixed by the two stroke lengths and are selected by pressurising the appropriate cylinder sections.
Yes, in many cases it can replace two SC-series cylinders with external stops or a complex sequencing valve setup. The SCT50X50X75S achieves the same three-position or four-position functionality in a single tandem body, reducing mounting hardware and alignment effort. It is a direct form-fit replacement only for another SCT50X50X75S with the magnet option.
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