Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 170mm and 40mm give 4 controllable stop positions across a 210mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1170 mm
- Stroke 240 mm
- Total travel210 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S
The SCT50X170X40S is a double-acting multi-position tandem cylinder that delivers four discrete mechanical stops from two independently controlled piston sections on a common 20 mm rod. With stroke1 set at 170 mm and stroke2 at 40 mm, the rod can be positioned at 0 mm (fully retracted), 40 mm, 170 mm, or the combined total travel of 210 mm. Each section provides a push force of 982 N at 0.5 MPa, scaling to 1767 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the tie-rod barrel for end-of-stroke or mid-position confirmation. The cylinder body has an A(SCT) length of 243 mm, uses PT1/4 ports, and features an adjustable pneumatic cushion of 21 mm on each end to decelerate the load smoothly. The default TPU seals suit standard operating temperatures from -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 170 / 40 mm |
| Total travel | 210 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) | 170 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 210 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 SCT50X170X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×170 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT50X170X40S Is Used
Two-Stage Diverter Gate
Uses the 40 mm stroke to clear a gate and the 170 mm stroke to fully divert product into a secondary lane, with sensors confirming each discrete position.
Dual-Depth Pressing
Executes a shallow 40 mm pre-press followed by a deep 170 mm main press stroke, ensuring consistent part density at two distinct compaction levels.
Multi-Stop Part Staging
Positions a workpiece at a 40 mm inspection station, a 170 mm machining station, and a 210 mm ejection point, all from one compact actuator.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X170X40S the Right Cylinder?
Selecting an SCT tandem cylinder is ideal when an application requires two or more fixed stopping points without the complexity of servo control or the bulk of two separate cylinders with external hard stops. This 50 mm bore model, with its 170 mm and 40 mm stroke sections, is a space-efficient alternative for sequences that need a long primary travel and a short secondary positioning move. If the per-section push force of 982 N at 0.5 MPa is insufficient for the load, stepping up to a 63 mm bore SCT increases the per-section push force to 1559 N at the same pressure.
For a direct replacement, match the 50 mm bore, both stroke lengths (170 mm and 40 mm), PT port thread, and the built-in magnet (-S). Since the primary stroke section is under 300 mm, standard rod guiding is typically adequate, but always assess the side-load moment on the 20 mm rod if the tooling is offset.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 170 + 40 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 SCT50X170X40S FAQ
This 4-position cylinder provides discrete mechanical stops at 0 mm (fully retracted), 40 mm (stroke2 extended), 170 mm (stroke1 extended), and 210 mm (both strokes extended). The positions are fixed by the two stroke sections and are not infinitely adjustable.
An SCT tandem cylinder integrates two piston sections on a single common rod, which saves significant space and simplifies plumbing compared to mounting two individual cylinders back-to-back. It also guarantees a fixed geometric relationship between the stop positions, eliminating the need to align and calibrate external hard stops.
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