The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-30STC is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 30 mm of field-adjustable stroke reduction. Operating at 0.5 MPa, it delivers 2513 N of push force and 2268 N on the pull stroke, making it a robust mid-range actuator for applications where the end position must be fine-tuned during commissioning or format changes. The 25 mm piston rod and 28 mm air cushion help manage deceleration effectively.
This configuration includes a built-in magnet for CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount, supplied with the TCM1 bracket (order code F-SC80TC), allowing the cylinder to pivot for swinging loads. The adjustable-stroke screw sets the stroke end position without altering the nominal 80 mm maximum stroke, giving you precise control over the stopping point directly on the machine.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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 30 mm adjustment range allows technicians to quickly fine-tune the end-stop position during initial machine setup without shimming or moving external hard stops, reducing commissioning time.
Ideal for packaging lines running multiple product sizes. Operators can adjust the stroke end to accommodate different box heights or pallet positions by simply turning the rear screw.
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for tooling or pad wear, maintaining consistent clamping force without replacing the cylinder.
Choose the SCJ80X80-30STC when your application requires a pivoting actuator with sensor feedback and the ability to dial in the stroke end position. If 2513 N of push force at 0.5 MPa is insufficient, stepping up to a 100 mm bore provides 3927 N; if it is excessive, a 63 mm bore offers 1559 N. For applications that do not require stroke adjustment, a fixed-stroke SC80X80 cylinder is a simpler alternative. The replacement match must be another SCJ80 with an 80 mm stroke, a 30 mm adjust range, PT ports, TC mount, and magnet.
For this 80 mm stroke, side-loading is generally not a primary concern, but if the rod is subjected to significant radial forces, an external guide rail or switching to a guided cylinder is recommended to prevent premature seal wear and rod bending.
Adjustable-stroke checklist
The rear cap houses an adjusting screw that limits the piston's retraction stroke. By turning the screw, you can shorten the stroke end by up to 30 mm from the nominal 80 mm maximum. This is a mechanical end-stop adjustment and does not change the cylinder's force output, which remains 2513 N push and 2268 N pull at 0.5 MPa.
A direct functional replacement requires another SCJ80 adjustable-stroke cylinder with an 80 mm nominal stroke and a 30 mm adjust range. A fixed-stroke SC80X80 cylinder will fit the same mounting (with F-SC80TC) and port connections but will lack the field-adjustable stroke feature. Ensure the replacement also has the magnet (S) and centre trunnion (TC) mount to maintain sensor and pivot functionality.
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