The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X250-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 250mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X250-75 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ series, featuring a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke-end reduction. With a 25 mm diameter rod and a body length of 239 mm, this tie-rod cylinder delivers a push force of 2513 N at 0.5 MPa, making it suitable for mid-range industrial automation tasks that require on-the-fly stroke tuning.
Designed for filtered air at 0.15-1.0 MPa, the cylinder operates at speeds of 30-800 mm/s and includes an adjustable pneumatic cushion for smooth deceleration. The standard PT3/8 port and M20x1.5 rod thread ensure straightforward integration, while the 75 mm adjustment range allows operators to fine-tune the stroke end without swapping the cylinder or adding external hard stops.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X250-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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.
Quickly adjust the stroke end by up to 75 mm to accommodate different product sizes on a packaging or labeling line, minimizing downtime between production runs.
Fine-tune the actuator's end position during initial machine commissioning to achieve precise alignment with mating tooling or fixtures, eliminating the need for shims.
Compensate for mechanical wear in grippers or pressing tools over time by incrementally adjusting the stroke end, maintaining consistent clamping force and product quality.
Choose the SCJ80X250-75 when you need a robust mid-bore cylinder with a wide stroke adjustment window. If the 2513 N push force at 0.5 MPa is insufficient, consider stepping up to the SCJ100 series, which offers 3927 N of push force. For applications requiring a fixed, non-adjustable stroke, the standard SC80 series provides a simpler, more compact alternative. This model is a direct replacement for any AirTAC SCJ80X250-75 cylinder with PT ports and basic mounting; ensure the bore, nominal stroke, and 75 mm adjust range match. For strokes of 250 mm, be mindful of potential rod deflection under high side loads—consider an external guide rail or a guided cylinder if the load is not perfectly axial.
Adjustable-stroke checklist
The rear-cap adjusting screw limits the piston's retraction, effectively shortening the maximum stroke from 250 mm down to 175 mm in the field. It sets the stroke end position; it does not alter the cylinder's bore, force output, or speed.
At 0.5 MPa, the SCJ80X250-75 delivers 2513 N of push force and 2268 N of pull force. The pull force is lower due to the area of the 25 mm piston rod. Maximum operating pressure is 1.0 MPa.
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