The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X30-30S 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, 30mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X30-30S is an 80 mm bore, single-rod double-acting pneumatic cylinder with a 30 mm nominal stroke and a 30 mm rear adjusting screw, letting you fine-tune the stroke end position on the machine without swapping the cylinder. At 0.5 MPa it delivers 2513 N push and 2268 N pull, placing it in a force class suited for medium-heavy clamping, pressing, and positioning tasks where a compact stroke is enough.
This model includes a built-in magnet (-S suffix), so CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for end-of-stroke confirmation. The 25 mm piston rod, PT3/8 ports, and 28 mm air cushion work together to handle rapid cycling. Body length A(SCJ) is 239 mm, making it slightly longer than a fixed-stroke SC80 of the same nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X30-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 30 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. |
| ×30 | 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 commissioning, technicians use the 30 mm rear screw to dial in the exact retract end position for a clamp or stop, compensating for tooling tolerances without re-machining any hard stops.
On a packaging line switching between product sizes, the adjustable stroke lets operators quickly set a new pusher retract position, reducing changeover time and eliminating the need to stock multiple fixed-stroke cylinders.
In a pressing or staking operation, the screw can be advanced periodically to compensate for tooling wear or material thickness drift, maintaining consistent press depth over thousands of cycles.
Step up to a 100 mm bore SCJ100 if your application needs more push force—the SCJ100 delivers 3927 N at the same 0.5 MPa. If you do not need field adjustability, the fixed-stroke SC80 is a simpler, slightly shorter alternative. For guided loads where side forces are present, consider pairing this cylinder with an external linear guide or moving to a guided cylinder series.
This SCJ80X30-30S replaces any AirTAC SCJ80 adjustable-stroke cylinder of the same 80 mm bore, 30 mm nominal stroke, 30 mm adjust range, PT thread, basic mount, and magnet option. The F-SC80TC trunnion bracket or F-SC80LB foot mount can be added later if your mounting needs change.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N (the pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
A screw in the rear cap lets you shorten the stroke end position by up to 30 mm. The nominal 30 mm stroke is the maximum; you can reduce the effective stroke anywhere within that 30 mm range by turning the screw. It adjusts the retract end position only and does not change the cylinder's force or speed.
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