Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 20mm give 4 controllable stop positions across a 120mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1100 mm
- Stroke 220 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20
The SCT63X100X20 tandem cylinder delivers four fixed rod positions—0 mm, 20 mm, 100 mm, and the combined 120 mm stroke—by pressurising its two piston sections independently. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum 0.9 MPa operating pressure, driven through a rigid 20 mm diameter piston rod.
With a 28 mm adjustable air cushion at each end and a body length A of 249 mm, this genuine AirTAC unit handles multi-stop tasks that would otherwise need two separate cylinders and complex valving. The PT1/4 ports and standard TPU seals suit filtered-air systems from -20 to +70 °C, making it a compact solution for sequenced linear movements.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 100 / 20 mm |
| Total travel | 120 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, 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 (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 100 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 120 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 SCT63X100X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×100 | 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 SCT63X100X20 Is Used
Two-Stage Part Diverting
Uses the 20 mm and 100 mm stops to guide parts into three separate lanes on a conveyor, eliminating the need for two independently controlled cylinders.
Sequential Clamping
Applies a light 20 mm pre-clamp stroke to position a workpiece, followed by the full 100 mm stroke for final high-force holding, all from one compact actuator.
Dual-Depth Pressing
Provides two distinct pressing depths (20 mm and 100 mm) in a single cycle for assembly operations requiring a shallow locate step before the main insertion.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X20 the Right Cylinder?
Choose the SCT63X100X20 when your process needs four distinct mechanical stops without electronic feedback. It replaces a pair of individual cylinders or an SC unit with external hard stops, simplifying plumbing and eliminating timing drift between separate actuators. If your force requirement is lower, stepping down to the 50 mm bore reduces single-section push to 982 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N per section at the same pressure.
A direct replacement must match the 63 mm bore, both 100 mm and 20 mm section strokes, PT port thread, and basic mounting. Should your application later require position sensing, the -S magnet option allows CMSG or DMSG sensors to be clamped directly onto the tie-rod barrel.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 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 SCT63X100X20 FAQ
It provides four discrete mechanical stop positions: 0 mm (fully retracted), 20 mm (section two extended), 100 mm (section one extended), and 120 mm (both sections extended). The stops are fixed by the two built-in stroke lengths and are selected by pressurising the appropriate cylinder ports.
Yes, in many cases it can. The SCT63X100X20 integrates two piston sections on a common rod line, giving you the 20 mm and 100 mm strokes from a single body. This saves space, reduces mounting hardware, and ensures the two strokes are always perfectly aligned, unlike two separate cylinders which can drift out of sequence.
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