The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X180-50STC 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, 180mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X180-50STC is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke series, offering a 50 mm field-adjustable range on the nominal 180 mm stroke. Its 80 mm bore delivers 2513 N of push force at 0.5 MPa, making it a capable mid-range actuator for tasks that need precise end-stop tuning without swapping hardware.
This model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG sensors and a centre trunnion (TC) mounting, supplied with the TCM1 bracket, allowing the cylinder to pivot for swinging loads. The 25 mm piston rod, PT3/8 ports, and 28 mm air cushion ensure smooth deceleration, while the rear adjusting screw lets operators quickly dial in the stroke end during commissioning or format changes.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X180-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 180 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. |
| ×180 | 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.
Fine-tune the stroke end position during machine commissioning by up to 50 mm, eliminating the need to machine custom stops or swap cylinders to achieve the perfect actuator throw.
Quickly adjust the cylinder's end point for different product sizes on a packaging or sorting line. The trunnion mount handles the pivoting motion common in diverter gates.
In clamping or pressing fixtures, use the rear screw to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamping force without reprogramming a servo.
Choose the SCJ80 when the 63 mm bore's 1559 N push is too light but the 100 mm bore's 3927 N is excessive. This 80 mm unit hits a balanced 2513 N at 0.5 MPa. The 50 mm adjustment range is ideal for applications where the final stroke position is determined during setup or needs periodic tweaking. If your application requires a fixed, non-adjustable stroke, the standard SC80 series is a simpler, cost-effective alternative.
For a direct replacement, match an AirTAC SCJ80 with an 80 mm bore, 180 mm nominal stroke, a -50 adjust range, PT ports, centre trunnion (TC) mounting, and the -S magnet. For strokes of 180 mm, rod deflection under side load is generally minimal, but for off-centre loads, always use an external guide rail or a guided cylinder to protect the rod and bearing.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N. The pull force is lower due to the 25 mm piston rod reducing the effective area on the return stroke. At the maximum 1.0 MPa, push force reaches 5026 N.
Yes, if your existing cylinder is an AirTAC SCJ80 with a 180 mm nominal stroke and a -50 adjust range, this STC variant is a direct dimensional match. It adds the built-in magnet for sensors and the centre trunnion (TC) mount with the TCM1 bracket, so ensure your machine frame has the pivot point for the trunnion.
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