The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-50STC 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, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-50STC is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. Its rear-cap adjusting screw provides up to 50 mm of stroke-end reduction, letting you fine-tune the 80 mm nominal stroke without swapping the unit. This model delivers 2513 N of push force at 0.5 MPa and features a 25 mm diameter piston rod with PT3/8 ports.
This variant is factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mounting, supplied with the TCM1 bracket. The trunnion allows the cylinder to pivot, making it ideal for swinging or articulating loads. The body length A is 239 mm, and the standard TPU seals suit operating temperatures from -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
During machine setup, the 50 mm adjustment screw allows engineers to precisely dial in the actuator's end position to match tooling or fixtures without modifying the machine frame or adding hard stops.
On packaging or sorting lines, the adjustable stroke lets operators quickly reset the cylinder's reach to handle different box sizes or product widths, minimizing downtime between batches.
In high-cycle clamping or pressing operations, the stroke-end screw can be periodically advanced to compensate for wear on gripper pads or tooling surfaces, maintaining consistent clamping force without replacing parts.
Choose the SCJ80X80-50STC when you need an 80 mm bore's force class (2513 N push at 0.5 MPa) and the flexibility to dial in the stroke end on the machine. If the 50 mm adjustment range is insufficient, consider stepping up to the SCJ100 bore, which offers 3927 N of push at the same pressure. For applications that don't require stroke adjustability, a fixed-stroke SC80X80 cylinder is a simpler, more cost-effective alternative.
As a direct replacement, match this model with another SCJ80X80-50STC: an 80 mm bore, 80 mm nominal stroke, 50 mm adjustable range, PT thread, centre trunnion (TC) mount, and a built-in magnet. The trunnion pivot handles misalignment in one plane, but for long strokes or high side loads, an external guide rod assembly should be used to protect the rod and bearings from bending moments.
Adjustable-stroke checklist
As a single-rod cylinder, the push and pull forces differ. At the standard 0.5 MPa operating pressure, the push force is 2513 N. The pull force on the retract stroke is lower at 2268 N because the 25 mm rod reduces the effective piston area. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
This is a direct replacement for any AirTAC SCJ80X80-50STC. To ensure compatibility with a non-AirTAC cylinder, you must match the 80 mm bore, 80 mm nominal stroke, the 50 mm adjustable range, PT3/8 port thread, centre trunnion (TC) mount with TCM1 bracket, and the built-in magnet for sensor mounting. The body length A is 239 mm.
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