The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X90-30S 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, 90mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X90-30S 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 30 mm of stroke reduction, letting you fine-tune the piston stop position without swapping the cylinder. At 0.5 MPa it delivers 2513 N of push force, and the 25 mm rod diameter handles robust linear tasks.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The body length A dimension is 239 mm, and the standard PT3/8 ports and 28 mm air cushion ensure smooth deceleration. Operating pressure spans 0.15–1.0 MPa with a speed range of 30–800 mm/s.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X90-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 90 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. |
| ×90 | 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.
The 30 mm adjust range lets technicians quickly fine-tune the end-stop during machine commissioning without removing the cylinder, cutting setup time.
On packaging lines, the adjustable stroke handles different box sizes by simply turning the rear screw, eliminating the need for multiple fixed-stroke cylinders.
The built-in magnet works with CMSG/DMSG sensors to confirm the adjusted stroke end, giving the PLC a clean signal for every cycle.
Choose the SCJ80X90-30S when you need mid-range force and the ability to dial in the stroke end on the machine. If your application demands more push, the SCJ100 bore provides 3927 N at 0.5 MPa; for a lighter, more compact solution the SCJ63 offers 1559 N. The adjustable stroke is ideal for commissioning or format changes, but if your stroke is fixed and never varies, a standard SC80 fixed-stroke cylinder is a simpler, cost-effective alternative.
For replacement, match the bore (80 mm), nominal stroke (90 mm), adjust range (-30), PT port thread, and the built-in magnet. This SCJ uses the basic mounting style; if you later need a pivot, the F-SC80TC centre trunnion kit can be added. At a 90 mm stroke, rod side-loading is minimal, but always align the load with the rod axis to prevent premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area on the return side.
The rear-cap adjusting screw limits how far the piston extends, shortening the stroke end by up to 30 mm. It is a mechanical stop for stroke adjustment only—it does not lock the piston or hold a load when air pressure is lost. For load holding without pressure, you must add an external rod lock or a pilot-operated check valve.
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