The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-40STC 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-40 brings field-adjustable stroke control to the 80 mm bore class, delivering 2513 N of push force at 0.5 MPa. A rear-mounted screw provides up to 40 mm of stroke-end adjustment, letting you dial in the exact stopping position without swapping the cylinder or adding external hard stops. The 25 mm piston rod and PT3/8 ports handle high flow, while the 28 mm air cushion at each end protects the assembly from impact.
This model is factory-configured with a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion (TC) mount that ships with the TCM1 bracket for pivoting applications. The body length A(SCJ) is 239 mm, making it a compact choice for machinery where the stroke must be tuned during commissioning or format changeovers.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-40STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 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. |
| ×75 | 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.
Quickly adjust the end stop for different product sizes on packaging or filling lines without mechanical rework, using the 40 mm screw range.
Fine-tune the stopping position of a diverter gate or part stop on a conveyor, compensating for wear or different pallet sizes.
Set a precise clamp or press depth in a woodworking or assembly fixture, with the centre trunnion mount allowing the cylinder to pivot into alignment.
Choose the SCJ80 for tasks needing up to 2513 N push at standard plant air. If your force requirement is lower, stepping down to the 63 mm bore saves space and weight while still providing 1559 N. For higher thrust, the 100 mm bore delivers 3927 N. This adjustable-stroke unit is ideal when the end position needs fine-tuning; if your application uses a fixed, repeatable stroke, the standard SC80 fixed-stroke cylinder is a simpler, cost-effective alternative. To replace this exact configuration, match bore (80 mm), nominal stroke (75 mm), adjust range (-40), PT ports, centre trunnion mounting with TCM1 bracket, and the integrated magnet sensor option.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (the difference is due to the single 25 mm rod). At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
A screw in the rear cap lets you shorten the stroke end by up to 40 mm. The nominal 75 mm stroke is the maximum; you can reduce it anywhere within that 40 mm range. It does not change the cylinder's force or speed, only the stopping position.
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