The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-40LB 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, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X150-40 delivers a robust 2513 N push force at 0.5 MPa, making it a workhorse for medium-duty automation tasks. Its 25 mm piston rod and 28 mm air cushion length provide the structural rigidity and smooth end-of-stroke deceleration needed for consistent cycling. The defining feature is the rear-cap adjusting screw, which allows the effective stroke to be shortened by up to 40 mm without removing the cylinder from the machine.
This model comes configured with an LB foot mount (F-SC80LB) for stable surface mounting, standard PT ports, and a TPU seal for a temperature range of -20 to +70 °C. The body length A is 239 mm, making it slightly longer than a fixed-stroke SC of the same bore to accommodate the adjustment mechanism. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-40LB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 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. |
| ×150 | 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 dial in a new stop position for different product sizes on a packaging line. The 40 mm adjustment range allows operators to fine-tune the stroke end without mechanical stops.
Compensate for material wear on a conveyor diverter gate. As the gate edge wears, the stroke can be incrementally lengthened to maintain a perfect seal, extending maintenance intervals.
Perfect for R&D and process development where the final stroke length is unknown. Engineers can experiment with different push positions on a press fixture to find the optimal setting before locking it in.
Choose this 80 mm bore when a 63 mm cylinder's 1559 N push force at 0.5 MPa is insufficient for the load. If your application requires a fixed, non-adjustable stroke, the standard SC series is a more cost-effective alternative. For applications with high side loads, especially at this 150 mm stroke, an external guide rail or a guided cylinder is recommended to prevent rod bending and premature seal wear.
As a direct replacement, match this model to another AirTAC SCJ with an 80 mm bore, a 150 mm nominal stroke, and a 40 mm adjustment range. Ensure the replacement has the same PT port thread and LB foot mounting to fit your existing machine footprint without modification.
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 1.0 MPa, the theoretical push force is 513 kgf (5026 N). The pull force is always lower due to the area of the 25 mm piston rod.
Yes, if you need field adjustability. The SCJ80X150-40 has the same bore and maximum stroke but is slightly longer in body length. You must also ensure the LB foot mounting matches your current setup. If you do not need the adjustment feature, a standard SC cylinder is a simpler, more economical choice.
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