The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø80mm bore, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a 100 mm adjustment range via a rear-cap screw. This 80 mm bore unit delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa, making it a strong performer for applications where the stop position must be fine-tuned during commissioning or changeovers without swapping the cylinder.
The nominal 225 mm stroke falls well within the 1500 mm maximum for this bore. The cylinder uses a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread for robust mounting. Its 28 mm air cushion decelerates the piston smoothly at end-of-travel, protecting the assembly from impact wear.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 100 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. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -100 | 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 100 mm adjustment screw allows engineers to precisely dial in the final stop position during machine commissioning, eliminating the need to fabricate custom shims or swap cylinders for minor stroke corrections.
In packaging or conveying lines, the stroke can be quickly re-adjusted to accommodate different product sizes or pallet patterns, significantly reducing downtime between production runs.
The adjustable end-stop can be used to take up mechanical play or wear in tooling and linkages over time, maintaining precise positioning without replacing the actuator or adding external stops.
Select the SCJ80 bore when your application needs the force class of 2513 N push at 0.5 MPa. If you require a higher force, the SCJ100 bore provides 3927 N push at the same pressure. For a lighter, more compact solution, the SCJ63 bore delivers 1559 N push. The adjustable stroke is ideal when the exact end position must be dialed in on the machine; if the stroke is fixed and known, the standard SC series is a more economical choice. For direct replacement, match the 80 mm bore, 225 mm nominal stroke, 100 mm adjustment range, PT port thread, and basic mounting style.
At a 225 mm stroke, side-loading is generally not a primary concern for this bore, but always ensure the load is guided and aligned with the rod axis to prevent bending. For applications with inherent side forces, consider an external guide rail or a guided cylinder.
Adjustable-stroke checklist
At the standard maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N. At a typical plant pressure of 0.7 MPa, it provides 3518 N of push force. The pull force is lower at 2268 N at 0.5 MPa due to the 25 mm piston rod reducing the effective piston area on the retract stroke.
Yes, provided the original unit is an AirTAC SCJ80 series with a 225 mm nominal stroke and a 100 mm adjustment range. You must also match the port thread (PT), mounting style (basic), and magnet option (none). The adjustable-stroke design is unique to the SCJ, so a fixed-stroke SC80 cylinder cannot be directly substituted without modifying the machine's end-stop setup.
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