Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 85mm and 165mm give 4 controllable stop positions across a 250mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 185 mm
- Stroke 2165 mm
- Total travel250 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S
The SCT40X85X165S is a tandem multi-position cylinder that provides four distinct rod positions: 0 mm (fully retracted), 85 mm, 165 mm, and the total travel of 250 mm. By pressurizing the two piston sections independently or together, you gain simple, repeatable multi-stop motion without complex servo controls. Each section delivers a push force of 628 N at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position sensing. The 40 mm bore cylinder features a 16 mm diameter piston rod, an M12x1.25 rod thread, and PT1/4 ports. Its adjustable pneumatic cushioning at both ends, with a cushion length of 21 mm, ensures smooth deceleration across all four stop positions.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 85 / 165 mm |
| Total travel | 250 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 165 mm |
| P3 (both extended) | 250 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X85X165S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×85 | Stroke 1 (section 1) in mm. |
| ×165 | 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 SCT40X85X165S Is Used
Three-Way Part Sorting
Use the four discrete positions to direct parts from a central conveyor to three different outfeed lanes. The rod stops at 0 mm, 85 mm, 165 mm, and 250 mm to align a diverter gate with each lane precisely.
Two-Depth Pressing or Staking
Achieve two distinct pressing depths in one cycle. The first section extends to 85 mm for a shallow form, and the second section adds travel to 165 mm or the full 250 mm for a deeper secondary operation.
Multi-Stop Material Feeding
Advance material strip or components to three different fixed lengths in a progressive die or automated assembly cell. The sensor-ready magnet confirms each stop position before the next machine cycle begins.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X85X165S the Right Cylinder?
Choose the SCT when your application needs up to four fixed, repeatable stop positions from a single, compact cylinder body, eliminating the complexity and air consumption of two separate actuators. For this 40 mm bore model, if higher force is needed, stepping up to the SCT50 series provides 982 N of push per section at 0.5 MPa. As a direct replacement, match the 40 mm bore, the exact stroke set of 85 mm and 165 mm, PT port threads, and the integrated magnet (-S suffix). This basic mounting version allows you to add the specific SCT bracket (FA, FB, CA, CB, or LB) your design requires.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 85 + 165 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 SCT40X85X165S FAQ
It provides four distinct mechanical stop positions: 0 mm (fully retracted), 85 mm, 165 mm, and the combined total travel of 250 mm. The positions are achieved by pressurizing the front piston section, the rear section, or both simultaneously.
Yes, it is designed for exactly that. A single SCT40X85X165S replaces two standard SC40 cylinders with 85 mm and 165 mm strokes, plus the associated mounting hardware and flow controls, saving space and simplifying your pneumatic circuit. Ensure the replacement matches the bore, both strokes, PT ports, and the -S magnet option.
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