Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 20mm give 3 controllable stop positions across a 40mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 120 mm
- Stroke 220 mm
- Total travel40 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20
The SCT63X20X20 is a double-acting tandem cylinder that provides three fixed rod positions: fully retracted (0mm), first stop at 20mm, and full extension at 40mm. Each piston section delivers 1559N of push force at 0.5MPa, rising to 2805N at 0.9MPa, making it a compact powerhouse for short-stroke multi-stop tasks.
Built on a rugged tie-rod design with a 20mm rod and M16x1.5 rod thread, this 63mm bore cylinder uses PT1/4 ports and features a 28mm adjustable air cushion. The body length (A dimension) is 249mm, keeping the overall footprint tight for machinery with limited space.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 20 / 20 mm |
| Total travel | 40 mm |
| Stop positions | 3 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, 28 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 20 mm |
| P2 (both extended) | 40 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X20X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT63X20X20 Is Used
3-Position Diverter Gate
Actuates a chute or gate to three fixed positions—closed, partial flow to bin A, and full flow to bin B—using simple pneumatic control.
Two-Stage Clamping Fixture
Provides a low-force pre-clamp at 20mm extension before applying full clamping pressure at the 40mm total stroke, protecting delicate parts.
Short-Stroke Sorting Pusher
Pushes components to one of two lanes with precise 20mm increments, ensuring reliable segregation on high-speed packaging lines.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X20X20 the Right Cylinder?
Choose the SCT63X20X20 when you need three repeatable mechanical stops without the complexity of two separate cylinders and external hard stops. The 20mm strokes are ideal for precise short-travel diverting or clamping. If your force requirement is lower, stepping down to the 50mm bore provides 982N push per section at 0.5MPa; for higher force, the 80mm bore offers 2513N.
For direct replacement, match the 63mm bore, both 20mm strokes, PT1/4 ports, and basic mounting. If your application requires magnetic piston sensing, specify the -S suffix to accept CMSG or DMSG sensors.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 20 + 20 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 SCT63X20X20 FAQ
This model provides 3 distinct positions because both section strokes are 20mm. The rod positions are 0mm (retracted), 20mm (first section extended), and 40mm (both sections extended).
Yes, if your sequence requires fixed 20mm and 40mm stops. The SCT63X20X20 integrates both strokes into one tie-rod body, eliminating the need to synchronize two separate cylinders and their mounting brackets.
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Related AirTAC SCT Multi-Position Cylinders
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