
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X64X26 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 64mm and 26mm give 4 controllable stop positions across a 90mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
The SCT50X64X26 tandem cylinder delivers four fixed rod positions—0 mm, 64 mm, 26 mm, and the full 90 mm extension—by pressurizing its two piston sections independently. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, making it suitable for diverting or sorting tasks that need distinct, repeatable stopping points without complex controls.
Built on a rugged tie-rod design with a 20 mm diameter rod and M16x1.5 rod thread, this model includes a 21 mm adjustable air cushion in each section to decelerate the load quietly. The body length A(SCT) is 243 mm, and the PT1/4 ports accept standard pneumatic fittings. It operates on filtered air from 0.15 to 1.0 MPa across a -20 to +70 °C range.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X64X26 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 64 / 26 mm |
| Total travel | 90 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 64 mm |
| P2 (section 2) | 26 mm |
| P3 (both extended) | 90 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.
| 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×64 | Stroke 1 (section 1) in mm. |
| ×26 | 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.
Use the 26 mm and 64 mm positions to guide parts into two separate chutes from a single conveyor lane, with the 90 mm full extension clearing the lane entirely.
Actuate the rod to 26 mm for a partial gate opening and 64 mm for a wider pass-through, controlling material flow in a hopper or chute without needing two separate actuators.
Apply a light pre-clamp at the 26 mm stroke before driving to the full 90 mm travel for final high-force clamping, protecting delicate workpieces during automated assembly.
Choose the SCT when your process requires two or more hard stops that must be mechanically fixed and highly repeatable, eliminating the cost and complexity of servo axes or multiple single-stroke cylinders with external stops. This 50 mm bore suits mid-range pushing and clamping; if you need more force, stepping up to a 63 mm bore provides 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 50 mm bore, both strokes (64 mm and 26 mm), PT port thread, and basic mounting style. Should your application require sensor feedback, order the same model with the -S magnet option to mount CMSG or DMSG switches directly on the tie-rod barrel.
Multi-position checklist
This model provides four discrete mechanical stop positions: fully retracted (0 mm), the first section extended (64 mm), the second section extended (26 mm), and both sections extended for the total travel of 90 mm. The stops are fixed by the cylinder's internal structure, not programmable.
Yes, if your sequence requires two fixed intermediate positions plus full retract and full extend. The SCT combines both strokes on a single rod line, saving space and eliminating the need to synchronize two separate cylinders. Ensure the replacement matches the 50 mm bore, 64 mm and 26 mm strokes, PT port thread, and your required mounting accessories.
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