The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X350-100S is a 50 mm bore, double-acting, single-rod pneumatic cylinder from AirTAC, engineered for applications where the stroke end position must be fine-tuned on the machine. Its rear-cap adjusting screw provides a generous 100 mm of field-adjustable stroke reduction, allowing operators to dial in the exact stopping point without swapping the cylinder or adding external hard stops. With a 20 mm diameter piston rod and PT1/4 ports, it delivers 982 N of push force at 0.5 MPa.
This model includes a built-in magnet, enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The standard TPU seal operates comfortably from -20 to +70 °C, and the integral air cushion, with a 21 mm cushion length, decelerates the piston smoothly at the end of its travel. The body length A(SCJ) for this 50 mm bore is 194 mm plus stroke, making it a compact yet powerful solution for dynamic industrial tasks.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| 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 | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | Nominal (maximum) stroke length in mm. |
| -100 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 100 mm adjustable stroke allows maintenance technicians to fine-tune the gate opening angle on a packaging line for different box sizes, ensuring a smooth product transfer without mechanical modifications.
In CNC machining or welding fixtures, the stroke can be adjusted to accommodate varying workpiece thicknesses. The magnetic piston allows for sensor feedback to confirm the clamp is fully engaged, preventing cycle start on an unclamped part.
The rear adjusting screw lets operators quickly change the dispense nozzle's travel depth for different container heights. This eliminates the need for mechanical stops and drastically reduces changeover time between production runs.
Choose the SCJ50X350-100S when you need a mid-range force actuator with a long, field-configurable stroke. At 0.5 MPa, its 982 N push force is a significant step up from the 40 mm bore SCJ40 series (628 N push), but if your load demands more power, the 63 mm bore SCJ63 series provides 1559 N of push force. For a fixed-stroke application without the need for adjustment, the standard SC50 series offers a simpler, more cost-effective alternative. When replacing this unit, match the 50 mm bore, 350 mm nominal stroke, 100 mm adjust range, PT port thread, and the -S magnet option. For a stroke of this length, be mindful of side-loads on the 20 mm rod; if the load is not guided externally, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
A screw in the rear end-cap acts as an internal, adjustable stop for the piston. By turning the screw, you can shorten the cylinder's effective stroke end position by up to 100 mm from its 350 mm nominal maximum. This is a mechanical stroke limiter, not a force or speed control, and allows for precise, repeatable positioning without changing the cylinder body.
At the standard operating pressure of 0.5 MPa, the SCJ50X350-100S generates 982 Newtons of push force and 825 Newtons of pull force. The push force is higher because it acts on the full 50 mm bore area, while the pull force is slightly reduced by the area of the 20 mm piston rod. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1767 N.
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