
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X150S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 150mm give 4 controllable stop positions across a 250mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
The AirTAC SCT63X100X150S is a double-acting multi-position tandem cylinder that delivers four distinct, repeatable rod positions: 0 mm, 100 mm, 150 mm, and 250 mm total travel. Each 63 mm bore piston section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at 0.9 MPa, driven through a rigid 20 mm diameter rod.
This model includes a built-in magnet (-S suffix), allowing easy attachment of CMSG, DMSG, or EMSG sensors directly to the tie-rod barrel for non-contact position feedback. The cylinder body has a length of 249 mm and features a 28 mm adjustable air cushion on both sections, ensuring controlled deceleration at each end of the stroke without requiring external shock absorbers.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X100X150S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 100 / 150 mm |
| Total travel | 250 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 100 mm |
| P2 (section 2) | 150 mm |
| P3 (both extended) | 250 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 | 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×150 | 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.
Uses the four positions (0, 100, 150, 250 mm) to route products to three separate conveyor lanes. The 100 mm stroke directs items left, the 150 mm stroke sends them right, and the full 250 mm travel opens a center bypass.
Provides two distinct pressing depths in one compact unit. The first piston section advances the tool to a 100 mm pre-press position, and the second section engages to reach the full 250 mm depth for the final forming operation.
Positions a workpiece pallet at three precise locations along an assembly line. The 100 mm stop presents the part for adhesive dispensing, the 150 mm stop for component placement, and the 250 mm stop for the pick-and-place unloading zone.
The SCT63X100X150S is the right choice when an application needs to index a load to four fixed mechanical stops without the complexity of servo controls or the bulk of two separate cylinders. The unequal strokes (100 mm and 150 mm) provide asymmetric positioning that is ideal for two-stage feeding or sorting mechanisms where one movement is longer than the other. If the 1559 N push force per section at 0.5 MPa is insufficient, stepping up to an SCT80 bore provides 2513 N per section, while a step down to an SCT50 bore offers 982 N.
For direct replacement, match the 63 mm bore, both the 100 mm and 150 mm strokes, PT port thread, basic mounting, and the -S magnet option. Because the total extended length reaches 250 mm, ensure the load is guided or supported to prevent side-loading and rod bending, especially at higher speeds.
Multi-position checklist
This tandem cylinder provides four discrete mechanical stops: fully retracted (0 mm), first section extended (100 mm), second section extended (150 mm), and both sections extended for the total travel of 250 mm. The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, in many cases. The SCT63X100X150S consolidates two 63 mm bore strokes into a single, compact tie-rod body, saving space and reducing mounting hardware. A direct replacement requires matching the bore, both the 100 mm and 150 mm strokes, the PT port thread, and the -S magnet option for sensor compatibility.
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