The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X500-40S 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, 500mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X500-40S is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 40 mm of stroke shortening, allowing precise end-position tuning without removing the cylinder. This model delivers 2513 N of push force at 0.5 MPa and up to 4523 N at the maximum operating pressure of 0.9 MPa, driven by a 25 mm diameter piston rod.
Equipped with a built-in magnet (-S suffix), the cylinder directly accepts CMSG/DMSG/EMSG reed and solid-state sensors for reliable end-of-stroke detection. The standard PT 3/8 port and TPU seals suit filtered air from -20 to +70 °C. With a body length A of 239 mm and a 28 mm air cushion, it is a robust, tie-rod design solution for applications needing repeatable, fine-tuned linear motion.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X500-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 500 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. |
| ×500 | 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.
The 40 mm adjustment screw lets technicians fine-tune the end stop during machine commissioning, perfectly aligning the actuator stroke with tooling or fixtures without needing to shim or reposition the cylinder body.
On packaging or sorting lines, operators can quickly adjust the stroke end to accommodate different product sizes or box formats, minimizing downtime between production runs with a simple mechanical adjustment.
In clamping or pressing operations, the adjustable stroke can be used to take up mechanical wear on contact surfaces over time, maintaining consistent clamping force and position without replacing the cylinder.
Choose the SCJ80X500-40S when you need a half-metre stroke with the ability to dial in the exact stop position during setup or changeovers. If 2513 N of push force at 0.5 MPa is insufficient, stepping up to the 100 mm bore provides 3927 N, while a step down to the 63 mm bore offers 1559 N. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC80X500 fixed-stroke cylinder is a simpler, more economical alternative.
At a 500 mm stroke, always assess side-loading on the 25 mm rod. If the load is not guided externally, consider adding a guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear. This model is a direct replacement for any AirTAC SCJ80X500-40S with PT ports, matching bore, nominal stroke, and 40 mm adjustment range.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 2513 N, and the pull force on the rod side is 2268 N. At the maximum operating pressure of 0.9 MPa, push force increases to 4523 N. These values assume a standard 25 mm rod and are identical to a fixed-stroke SC80 cylinder.
Yes. The -S suffix in SCJ80X500-40S indicates a built-in magnetic piston. You can directly clamp AirTAC CMSG, DMSG, or EMSG sensors onto the barrel's sensor groove to detect piston position, which is ideal for confirming the end of stroke in automated sequences.
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