Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 100mm give 4 controllable stop positions across a 120mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 120 mm
- Stroke 2100 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100
The SCT40X20X100 is a double-acting tandem cylinder that delivers four fixed rod positions—0 mm, 20 mm, 100 mm, and the combined total travel of 120 mm—by pressurising its two piston sections independently or together. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa, driven through a 16 mm diameter piston rod.
Built on a rugged tie-rod design with a 235 mm body length, this multi-position actuator uses PT1/4 ports and an adjustable air cushion to decelerate the load smoothly at each end of the 120 mm total stroke. It is a genuine AirTAC unit, ideal for compact machines that need three intermediate stopping points without the complexity of servo controls.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 20 / 100 mm |
| Total travel | 120 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) | 20 mm |
| P2 (section 2) | 100 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 (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 SCT40X20X100
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT40X20X100 Is Used
Two-Stage Part Diverting
Operates a diverter gate with a retracted home (0 mm), a partial-extend bypass position (20 mm), and a full-extend sort position (120 mm), using the 100 mm stroke section for the main travel.
Multi-Depth Clamping
Applies a light pre-clamp at the 20 mm stop before engaging full clamping force at the 120 mm total travel, protecting delicate assemblies from sudden impact.
Three-Stop Pusher
Pushes products to three distinct stations along a line—a short 20 mm nudge, a 100 mm intermediate placement, and a full 120 mm transfer—using a single cylinder body.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X20X100 the Right Cylinder?
Choose the SCT40X20X100 when your sequence requires stopping at 20 mm, 100 mm, and the fully extended 120 mm position from a single compact assembly. This approach eliminates the alignment headaches and extra valving of two separate cylinders with external hard stops. If the 628 N push force per section is too light, stepping up to the SCT50 bore provides 982 N per section at the same 0.5 MPa pressure.
For a drop-in replacement, match the 40 mm bore, both the 20 mm and 100 mm section strokes, PT port thread, and basic mounting configuration. Should your application require magnetic piston sensing, specify the -S suffix to accept CMSG or DMSG sensors directly on the tie-rod barrel.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 100 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 SCT40X20X100 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 20 mm (first section extended), 100 mm (second section extended), and 120 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates two piston sections on a single common rod, guaranteeing inherent alignment between the 20 mm and 100 mm stroke movements. This saves space, reduces mounting hardware, and simplifies pneumatic plumbing compared to installing and sequencing two individual ISO cylinders with external stoppers.
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