The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X200-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 200mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X200-75 is a double-acting, single-rod pneumatic cylinder that provides a nominal 200 mm stroke with a 75 mm rear-end adjustment range, letting you fine-tune the stroke end position on the machine without swapping the cylinder. It delivers 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa, driven by a 25 mm diameter piston rod, making it suitable for medium-to-heavy linear actuation tasks where commissioning or format changes demand precise end-stop control.
This tie-rod cylinder features a PT3/8 port, an M20x1.5 rod thread, and a 28 mm pneumatic cushion for smooth deceleration. The body length A(SCJ) is 239 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the rear adjusting screw. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and handles speeds of 30-800 mm/s, with a standard TPU seal rated for -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X200-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 75 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -75 | 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 bring-up, the 75 mm adjustment screw lets technicians quickly set the exact push or retract end position for grippers, clamps, or ejectors without iterative disassembly.
When a packaging machine switches between box sizes, the adjustable stroke re-positions a stop gate or pusher plate in minutes, reducing downtime compared to changing out fixed-stroke cylinders.
In light pressing or staking operations, the screw can be advanced periodically to compensate for tooling wear or material thickness variation, maintaining consistent contact force without reprogramming a servo.
Choose the SCJ80X200-75 when you need to dial in the stroke end during setup or after tooling wear. If 2513 N of push at 0.5 MPa is insufficient, stepping up to the 100 mm bore provides 3927 N; if the force is more than you need and you want a lighter assembly, the 63 mm bore offers 1559 N. For applications where the stroke is fixed and never needs field adjustment, the standard SC80X200 is a simpler, slightly shorter alternative. This model is a direct replacement for any AirTAC SCJ80X200-75 with a PT port and basic mounting; if your original has a magnet or a TC trunnion, match those suffix options exactly. At a 200 mm stroke, rod bending under side load is generally not a concern, but for any off-axis force, add an external linear guide or switch to a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (reduced by the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The theoretical maximum at 1.0 MPa is 513 kgf.
A rear-cap screw physically limits how far the piston can extend, shortening the stroke end by up to 75 mm from the 200 mm nominal maximum. It is a mechanical end-stop only; it does not lock the piston in place. If you lose air pressure, the rod can drift, so an external lock or pilot-operated check valve is required for load holding.
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