Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 90mm and 20mm give 4 controllable stop positions across a 110mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 190 mm
- Stroke 220 mm
- Total travel110 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S
The SCT50X90X20S tandem cylinder delivers four discrete rod positions—0, 20, 90, and 110 mm—by combining a 90 mm primary stroke with a 20 mm secondary stroke on a single tie-rod body. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the 0.9 MPa maximum operating pressure, while the 20 mm piston rod and 21 mm air cushion at both ends ensure controlled deceleration.
A built-in magnet is integrated along the barrel as standard on this -S variant, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the body for non-contact position feedback. The cylinder operates on filtered air from 0.15 to 1.0 MPa with TPU seals rated for -20 to +70 °C, and its PT1/4 ports and 243 mm base body length make it a drop-in unit for multi-stop sorting or diverting stations.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 90 / 20 mm |
| Total travel | 110 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) | 90 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 110 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 SCT50X90X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×90 | 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 SCT50X90X20S Is Used
Two-Way Part Diverting
Use the 0, 20, 90, and 110 mm positions to sort small components into two separate chutes from one feed lane, with the 20 mm stroke acting as a pre-position gate before the main 90 mm divert.
Multi-Depth Press-Fit Insertion
Insert bushings or pins to two controlled depths in one cycle. The 20 mm stroke sets a shallow pre-insertion, and the 90 mm stroke completes the full-depth press, giving four total stop points for tool clearance.
Conveyor Lane Staggering
Stagger product flow on a packaging line by extending the rod to 20 mm for lane one, 90 mm for lane two, or full 110 mm to clear a reject path, all controlled by discrete valve signals to each cylinder section.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X90X20S the Right Cylinder?
Choose the SCT50X90X20S when your process needs four fixed stopping points without the complexity of two separate cylinders and external hard stops. The discrete 20/90/110 mm positions suit light part diversion or two-depth insertion tasks. If your thrust requirement is lower, stepping down to a 40 mm bore reduces per-section push to 628 N at 0.5 MPa; for heavier tooling, the 63 mm bore provides 1559 N.
This model is a direct replacement for an existing AirTAC SCT50X90X20S with magnet and PT threads. When matching, confirm both stroke sections (90 mm and 20 mm), the 50 mm bore, PT1/4 port thread, and the -S magnet option. The 90 mm primary stroke is relatively short, so rod bending under side load is not a primary concern, but always align the load axially with the rod eye.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 90 + 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 SCT50X90X20S FAQ
It provides four distinct mechanical stops at 0 mm (fully retracted), 20 mm (secondary section extended), 90 mm (primary section extended), and 110 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurising the appropriate cylinder sections.
Yes, if your original unit also had the built-in magnet option. The SCT50X90X20S is mechanically identical in bore, both stroke sections, PT1/4 ports, and tie-rod body length, but it includes the -S magnet for direct mounting of CMSG/DMSG sensors. If your application does not use sensors, a non-magnet SCT50X90X20 is the exact match.
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