The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X450-40S 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. Ø80mm bore, 450mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X450-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you up to 40 mm of fine-tuning range via the rear-cap screw. With an 80 mm bore and 450 mm nominal stroke, it delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa, making it a strong choice for mid-range industrial actuators that need precise end-position setup.
This model includes a built-in magnet (-S), so you can directly mount CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable, non-contact position feedback. The 25 mm diameter piston rod and PT3/8 ports are standard for the 80 mm bore, and the air cushion (28 mm long) provides smooth deceleration near stroke end. The body length A(SCJ) is 239 mm plus the stroke, making it slightly longer than a fixed-stroke SC of the same size.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X450-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 40 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. |
| ×450 | 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.
Quickly adjust the push stroke for different box or carton sizes during changeovers. The 40 mm adjustment range lets operators fine-tune the final insertion depth without mechanical stops.
Set the exact clamp position for varying workpiece thicknesses. The rear screw adjustment holds the stroke end reliably, and the built-in magnet confirms clamp closure via a sensor.
Use the 450 mm stroke to push a diverter gate, with the 40 mm adjust range to perfectly align the gate edge with the conveyor rail, eliminating gaps that cause jams.
Choose the SCJ80X450-40S when you need to dial in the stroke end on a machine without swapping cylinders—ideal for commissioning, format changes, or compensating for tooling wear. If you need more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa; for a lighter, more compact solution, the 63 mm bore delivers 1559 N. This is a genuine AirTAC adjustable-stroke cylinder, so for a direct replacement, match the 80 mm bore, 450 mm nominal stroke, -40 adjust range, PT ports, and the -S magnet option.
At a 450 mm stroke, the rod is fully extended, so you must manage side loads carefully. Use an external guide rail or consider a guided cylinder if the load is not perfectly axial to prevent rod bending and premature seal wear. If you do not need the adjustable stroke, the fixed-stroke SC80X450-S is a more economical alternative.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. Because this is a single-rod cylinder, the push force is always greater than the pull force due to the area of the 25 mm rod.
Yes, if your current cylinder is an AirTAC SC80X450-S or a compatible 80 mm bore, 450 mm stroke model with PT ports and a magnet. The SCJ80X450-40S adds a rear adjusting screw for a 40 mm stroke-end adjustment range. It is slightly longer in body length than a fixed-stroke SC, so verify the available space in your machine.
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