The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X200-50STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 200mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X200-50STC delivers a robust 2513 N push force at 0.5 MPa, scaling up to 4523 N at 0.9 MPa, making it a workhorse for medium-to-heavy pneumatic tasks. Its defining feature is the rear-cap adjusting screw, which provides a 50 mm field-adjustable stroke-end range, allowing operators to fine-tune the piston stop position without dismounting the cylinder or altering the nominal 200 mm stroke.
This model is factory-configured with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion (TC) pivot mount, supplied with the TCM1 bracket for smooth swinging loads. The 25 mm diameter piston rod and 28 mm air cushion length ensure dependable deceleration, while the PT3/8 port supplies ample flow for 30-800 mm/s speed control.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X200-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 50 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. |
| -50 | 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 50 mm adjustment screw lets operators quickly reset an end stop for different product sizes on packaging or filling lines without replacing the cylinder or adding mechanical stops.
With the TC centre trunnion mount, this cylinder is perfect for actuating swinging diverter arms on conveyors, where the stroke end can be fine-tuned to align precisely with guide rails.
In automated welding or assembly fixtures, the adjustable stroke compensates for part tolerance stack-up or tooling wear, maintaining consistent clamp force without over-stroking.
Choose the SCJ80X200-50STC when you need a 200 mm nominal stroke with the ability to dial back the end position by up to 50 mm during commissioning or changeovers. If your force requirement is lower, the 63 mm bore SCJ offers 1559 N push, reducing air consumption; for heavier loads, step up to the 100 mm bore which provides 3927 N push at the same pressure. The centre trunnion mount is ideal for applications where the cylinder body must pivot, but if your load runs purely linearly, a foot-mounted (LB) configuration may simplify installation.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 200 mm nominal stroke, -50 adjust range, PT thread, TC mounting, and magnet. At this 200 mm stroke, rod deflection is minimal under aligned loads, but if the application introduces side forces, consider adding an external guide rail or switching to a guided cylinder to protect the rod bearings and seal.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 2513 N pushing and 2268 N pulling (the pull force is lower due to the 25 mm single rod area). At the maximum 1.0 MPa pressure, theoretical push force reaches 513 kgf (5023 N).
Yes, if you need field-adjustable stroke-end control. The SCJ shares the same mounting footprint and porting as the SC series. Ensure you match the 80 mm bore, PT3/8 ports, and if you need the pivot action, the TC mount. The SCJ body is slightly longer to house the adjusting screw mechanism.
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