The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X210-30S 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, 210mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X210-30S is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that lets you fine-tune the stroke end position within a 30 mm range. It delivers a substantial 2513 N of push force at 0.5 MPa, rising to 4523 N at the 0.9 MPa maximum operating pressure, making it a strong candidate for medium-heavy material handling and clamping tasks where the final actuator position needs on-machine dialling-in.
This model includes a built-in magnet (-S suffix), so reed or solid-state sensors like CMSG/DMSG/EMSG can be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 25 mm piston rod, PT3/8 ports, and 28 mm air cushion at each end provide robust construction and smooth deceleration. The body length A(SCJ) is 239 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X210-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 210 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. |
| ×210 | 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.
Dial in the exact push-stroke end point during machine build without fabricating shims or custom end stops. The 30 mm screw adjustment lets technicians fine-tune the actuator position quickly.
On packaging lines, adjust the stroke end to match a new box or tray size. The 80 mm bore provides the force to clamp or push heavier products, and the screw adjustment handles the format change in seconds.
In high-cycle clamping fixtures, use the rear screw to compensate for jaw or pad wear over time, maintaining consistent clamping force without replacing the entire cylinder or adding external shims.
Choose the SCJ80X210-30S when you need to commission a 210 mm nominal stroke and then trim the end point by up to 30 mm without swapping the cylinder. If your load demands more force, stepping up to the 100 mm bore SCJ series provides 3927 N push at 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC80X200 or SC80X250 fixed-stroke cylinder is a simpler, lower-cost alternative. The exact replacement match is an AirTAC SCJ adjustable-stroke cylinder of 80 mm bore, 210 mm nominal stroke, 30 mm adjust range, PT3/8 ports, basic mounting, and a built-in magnet.
At a 210 mm stroke, the rod is well-supported within the bore, but if your load applies a significant side force, consider adding an external linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa air pressure it generates 2513 N pushing and 2268 N pulling. The push force rises to 4523 N at the maximum operating pressure of 0.9 MPa. Because it is a single-rod cylinder, the push force is always greater than the pull force.
You can replace a fixed-stroke AirTAC SC80 cylinder with this SCJ80X210-30S if you need the 30 mm field-adjustable stroke feature. The port size (PT3/8), rod diameter (25 mm), and mounting accessories (FA, LB, TC) are directly compatible. Ensure your machine has clearance for the slightly longer body length A(SCJ) of 239 mm.
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