The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X80-100S 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, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ50X80-100S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. A rear-cap adjusting screw provides a full 100 mm of adjustment range, letting you dial in the exact stop position for an 80 mm nominal stroke without swapping the cylinder or adding external hard stops. This model generates 982 N of push force and 825 N of pull force at 0.5 MPa, driven through a 20 mm diameter piston rod.
Equipped with a built-in magnet (-S suffix), the SCJ50X80-100S is ready for CMSG, DMSG, or EMSG solid-state and reed sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The body length A is 194 mm, and it uses a PT1/4 port with an M16x1.5 rod thread. This genuine AirTAC unit is a practical solution for commissioning trials or format changeovers where the stroke length needs to be field-tuned.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X80-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
Engineers can use the 100 mm rear adjustment screw to empirically find the ideal stroke end for a new machine cycle, then lock it in place without fabricating custom mechanical stops.
In a clamping fixture, the adjustable stroke can be periodically shortened to take up for the wear of contact pads, maintaining consistent clamping force without reprogramming a servo axis.
A single actuator with a 100 mm adjust range can serve as a retractable stop for different product sizes on a conveyor, with the sensor magnet confirming the cylinder's retracted position for each setup.
Choose the SCJ50X80-100S when you need a 50 mm bore cylinder with a nominal 80 mm stroke and the ability to shorten that stroke end by up to 100 mm during setup. If your force requirements are lower, stepping down to the SCJ40 series provides 628 N of push force at 0.5 MPa. For applications needing more power, the SCJ63 delivers 1559 N of push force under the same pressure. If the stroke never needs adjustment, the fixed-stroke SC50X80 is a more economical alternative.
For a direct replacement, match this model's 50 mm bore, 80 mm nominal stroke, 100 mm adjustment range, PT port thread, and built-in magnet. This cylinder uses the basic mounting style; if a pivoting motion is required later, the TC centre trunnion kit (F-SC50TC) can be ordered separately. For strokes of 300 mm or more, evaluate the rod's side-load capacity and consider an external guide rail to prevent bending.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this cylinder provides 982 N of push force and 825 N of pull force. The maximum operating pressure is 1.0 MPa, yielding a theoretical push force of 1767 N. The pull force is always lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the added benefit of a field-adjustable stroke. The SCJ50X80-100S can replace another AirTAC SCJ of the same bore, stroke, and adjust range, or a fixed-stroke SC50 cylinder where you now require an adjustable end position. Ensure the port thread (PT1/4), mounting style, and sensor magnet requirements match your current setup.
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