The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X250-50SH is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 250mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X250-50SH is a double-acting, single-rod pneumatic cylinder with a 50 mm field-adjustable stroke range, letting you fine-tune the end position without swapping the unit. Its 80 mm bore delivers 2513 N of push force at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for medium-duty automation tasks.
This model is built with high-temperature Viton (FKM) seals, extending the operating range from 0 to +150 °C, and includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. The 25 mm piston rod and PT3/8 ports handle rapid cycling, while the 28 mm air cushion at each end provides smooth deceleration for the 250 mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X250-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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 | Up to 1500 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -50 | 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 50 mm adjustment screw allows technicians to dial in the exact stroke end position during machine commissioning, accommodating minor assembly variations without needing custom-length cylinders.
Quickly adapt a stopper or pusher station for different product sizes on a packaging line by adjusting the cylinder's stroke end, reducing downtime between batches.
The Viton seals and 0-150°C rating make this cylinder suitable for actuating clamping or ejection mechanisms in heated platen presses and thermoforming tools.
Step up to the 100 mm bore SCJ if your application demands more than the 2513 N push force this 80 mm unit provides at 0.5 MPa; the 100 mm bore offers 3927 N. For tasks requiring a fixed, non-adjustable stroke, the standard SC series is a more economical alternative. This SCJ80X250-50SH is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of identical bore, 250 mm nominal stroke, 50 mm adjust range, PT port thread, and Viton seals. At this 250 mm stroke length, ensure the load is guided externally to prevent excessive side-loading and rod bending.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The maximum push force at the 0.9 MPa operating limit is 4523 N. The pull force is lower due to the area of the 25 mm piston rod.
No. Like all standard pneumatic cylinders, the SCJ80X250-50SH will not hold its position if air pressure is lost or the valve is centered. The adjustable screw only sets the stroke end point, not a mid-stroke stop. For position holding, you must add an external rod lock or a pilot-operated check valve.
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