The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X80-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø40mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X80-40 is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw lets you shorten the stroke end by up to 40 mm, so the effective stroke can be dialed from 40 mm to the full 80 mm nominal length without swapping the cylinder. This is a practical solution for commissioning trials, format changeovers, or taking up mechanical wear over time.
At 0.5 MPa, this 40 mm bore unit delivers 628 N of push force and 528 N on the pull stroke, with a maximum push of 1130 N at 0.9 MPa. The 16 mm diameter piston rod, PT1/4 ports, and 21 mm air cushion are standard for this bore class, and the body length is 185 mm (A dimension). It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile, so dimensional interchangeability is limited to another SCJ40 of the same configuration.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X80-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Dial in the perfect actuator end-stop during initial machine setup. The 40 mm adjustment range allows technicians to fine-tune the stroke without ordering multiple fixed-stroke cylinders, speeding up the commissioning process.
Quickly adapt a packaging or assembly line to a new product size. The rear screw adjusts the cylinder's reach for different box heights or part positions, minimizing downtime between production runs.
Compensate for mechanical wear in tooling or grippers over time. Instead of replacing worn parts immediately, the stroke can be extended slightly via the adjusting screw to maintain precise contact and cycle consistency.
Choose the SCJ40 when you need to fine-tune a machine's end position without adding external hard stops. If the 628 N push force at 0.5 MPa is marginal, stepping up to the SCJ50 provides 982 N of push, while the smaller SCJ32 offers 402 N for lighter, more compact tasks. For applications that don't require stroke adjustment, the fixed-stroke SC series is a simpler, more cost-effective alternative. This model is a direct replacement for another AirTAC SCJ40X80-40 with PT ports and basic mounting. If your application involves a side load, particularly at this 80 mm stroke, ensure the load is guided externally or consider a guided cylinder to protect the rod bearing.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder generates 628 N of push force and 528 N of pull force. The maximum push force at 0.9 MPa is 1130 N. These values are identical to a fixed-stroke SC40 of the same bore.
Yes, this is a direct replacement for any AirTAC SCJ40X80-40 with PT ports and basic mounting. Ensure the bore (40 mm), nominal stroke (80 mm), and adjustment range (40 mm) match your original unit. It is not dimensionally interchangeable with ISO 15552 cylinders.
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