The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X25-30SLB is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 25mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X25-30S is an 80 mm bore double-acting single-rod cylinder that lets you fine-tune the stroke end position by up to 30 mm via a rear-cap adjusting screw, without swapping the unit. Its 25 mm rod delivers 2513 N of push force at 0.5 MPa, rising to 4523 N at 0.9 MPa, making it a strong choice for compact stations where the final stop point needs dialling in during commissioning.
This model includes a built-in magnet for CMSG/DMSG/EMSG sensors and ships with LB axial foot mounts (order code F-SC80LB) for secure surface installation. The tie-rod body is 239 mm long (A dimension), and the 28 mm air cushion decelerates the piston quietly at end of travel. Operating pressure spans 0.15–1.0 MPa with filtered air, and the PT3/8 port keeps flow high for 30–800 mm/s speed.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X25-30SLB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 30 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. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
During machine bring-up, the 30 mm rear screw lets technicians dial in the exact stop position for a gripper or pusher without remachining hard stops, speeding up the debug phase.
On a packaging line where a mechanical stop pad wears over time, the SCJ80X25-30S can be adjusted outward to compensate, maintaining precise placement without immediate part replacement.
When a carton erector switches between box sizes, the adjustable stroke lets operators quickly set a new end position for the flap-folding cylinder, reducing changeover time versus swapping fixed-stroke units.
Step up to the 100 mm bore SCJ if your push force needs exceed 2513 N at 0.5 MPa—the 100 bore delivers 3927 N. For lighter, faster cycles, the 63 mm bore provides 1559 N push. This SCJ adjustable-stroke design is ideal when you must tweak the end position on the machine; if the stroke is fixed and never changes, a standard SC80X25 cylinder with the same LB mount and magnet is a simpler, lower-cost alternative. Replacement must match bore (80 mm), nominal stroke (25 mm), the -30 adjust range, PT3/8 ports, SCJ-compatible LB foot mounting, and the -S magnet. For strokes of 300 mm or more, evaluate side-loading on the 25 mm rod and consider an external guide or a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, push force is 2513 N and pull force is 2268 N (the rod reduces the piston area on the return). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 5026 N, though we recommend staying within the 0.9 MPa rating of 4523 N for continuous duty.
Yes, if the bore (80 mm), nominal stroke (25 mm), and the -30 mm adjustable range match. You must also match the port thread (PT), mounting style (LB foot), and the magnet option (-S). The SCJ uses a specific rear screw mechanism, so only another SCJ adjustable-stroke cylinder is a direct drop-in replacement.
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