The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-40 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, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-40 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that lets you shorten the stroke end by up to 40 mm in the field. At 0.5 MPa it delivers 2513 N push and 2268 N pull, while at the maximum operating pressure of 0.9 MPa the push force reaches 4523 N. The 25 mm rod and PT3/8 ports handle demanding linear tasks, and the 28 mm air cushion decelerates the piston smoothly at end of travel.
Because the effective stroke is adjustable, you can dial in the exact stopping position during commissioning, format changeovers, or after mechanical wear without replacing the cylinder or adding external hard stops. The body length A(SCJ) is 239 mm, slightly longer than a fixed-stroke SC of the same bore. This unit is basic-mounted with TPU seals and PT threads, ready to bolt into standard tie-rod footprints.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
A packaging machine uses the 40 mm adjustment range to precisely set the insertion depth of a pusher plate. Operators tweak the rear screw during product changeovers without stopping the line for a cylinder swap.
In a woodworking clamp, the adjustable stroke compensates for pad wear over thousands of cycles. The 2513 N push force at 0.5 MPa provides ample clamping pressure, and the stroke is shortened gradually to maintain consistent grip.
A conveyor diverter uses the SCJ80X80-40 to control the gate angle. The 40 mm screw adjustment allows the maintenance team to fine-tune the gate’s end position for different parcel sizes, with the 28 mm cushion absorbing the kinetic energy at the end of each stroke.
Step up to a 100 mm bore SCJ if your application needs more force—the SCJ100 delivers 3927 N push at 0.5 MPa. If a fixed stroke is acceptable and you want a shorter overall length, the standard SC80 series is a lighter, simpler alternative. For guided loads where side forces are present, pair the cylinder with an external guide rail or switch to a guided cylinder; the SCJ itself is not designed to absorb lateral loads.
When replacing an existing unit, match an AirTAC SCJ adjustable-stroke cylinder with the same 80 mm bore, 80 mm nominal stroke, 40 mm adjustment range, PT3/8 ports, and basic mounting. The F-SC80TC centre trunnion or F-SC80LB foot bracket can be added if the mounting style changes.
Adjustable-stroke checklist
The push force is 2513 N at 0.5 MPa, 3518 N at 0.7 MPa, and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is lower because of the single 25 mm rod: 2268 N at 0.5 MPa. The theoretical maximum force at 1.0 MPa is 513 kgf.
Yes, if you need the 40 mm field-adjustable stroke range. The SCJ body is slightly longer (239 mm A-length) to house the adjusting screw. Ensure the port size (PT3/8), mounting style, and magnet option match your current setup. If you do not need adjustability, the standard SC80 is a more compact, cost-effective choice.
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