The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X80-40 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. Ø50mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X80-40 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, built on a robust tie-rod construction. Its 50 mm bore delivers a push force of 982 N at 0.5 MPa, and the rear-cap adjusting screw provides up to 40 mm of stroke shortening, allowing precise end-position tuning without replacing the cylinder or adding external hard stops.
This model features a 20 mm piston rod, PT1/4 ports, and an M16x1.5 rod thread for secure tooling attachment. With a 21 mm air cushion and a body length of 194 mm, it offers smooth deceleration in a compact envelope, making it a practical choice for commissioning and format-change applications where stroke length must be dialled in on the machine.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X80-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 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 | M16×1.5 |
| 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, 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | 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.
The 40 mm rear adjuster lets technicians dial in the exact stroke end position during initial machine commissioning, eliminating the need to fabricate custom shims or hard stops for the 80 mm nominal stroke.
Quickly adapt the cylinder's end position for different product sizes on a packaging or assembly line. The screw adjustment allows a 40 mm range of motion control without any disassembly of the actuator.
In high-cycle applications, the adjustable stroke can compensate for mechanical wear in tooling or grippers over time, maintaining consistent part contact and process quality with a simple turn of a screw.
Choose the SCJ50X80-40 when you need to fine-tune the stroke end position by up to 40 mm during setup or changeover. If your application requires a higher force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa pressure. For a fixed, non-adjustable stroke, the standard SC series offers a simpler, lower-cost alternative. A direct replacement must match the 50 mm bore, 80 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
At 0.5 MPa, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. The maximum operating force at 0.9 MPa is 1767 N push. The rear adjusting screw only changes the stroke end position and does not affect the output force.
Yes, if you need field-adjustable stroke. The SCJ50X80-40 shares the same bore, port size (PT1/4), and mounting accessories as the SC50 series. Ensure the 40 mm adjust range is suitable, and match the port thread and magnet option for a direct drop-in replacement.
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