The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X125-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø80mm bore, 125mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X125-10 is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a nominal 125 mm stroke and a 10 mm field-adjustable range. The rear-cap screw lets you fine-tune the stroke end position by up to 10 mm without removing the cylinder, making it ideal for commissioning and format changeovers. It delivers a robust push force of 2513 N at 0.5 MPa (4523 N at 0.9 MPa) and uses a 25 mm diameter piston rod with PT3/8 ports.
This tie-rod cylinder features an adjustable air cushion (28 mm length) for smooth deceleration and operates on 40 µm filtered air from 0.15 to 1.0 MPa. The standard TPU seals work from -20 to +70 °C. With a body length A of 239 mm, it fits where a fixed-stroke SC is too rigid. This model is a basic configuration with PT threads and no magnet, ready for direct mounting via the rod thread (M20x1.5) and accessory brackets from the SCJ subset.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X125-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 125 mm |
| Stroke adjustment | Up to 10 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. |
| ×125 | Nominal (maximum) stroke length in mm. |
| -10 | 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 10 mm rear screw allows precise stroke-end adjustment to align with mating parts, eliminating the need to shim or reposition the entire cylinder.
In high-cycle material handling, mechanical stops can wear. The adjustable stroke compensates for this wear over time, maintaining accurate positioning without immediate parts replacement.
For packaging or assembly lines running multiple product sizes, the SCJ80X125-10 lets operators quickly dial in a new stroke end for different box heights or part thicknesses.
Choose the SCJ80 when you need the 2513 N push force class at 0.5 MPa. If your application requires less force, the 63 mm bore SCJ63 provides 1559 N push at the same pressure. For higher force, step up to the 100 mm bore SCJ100, which delivers 3927 N push at 0.5 MPa. The 10 mm adjust range on this model is for fine end-stop tuning; if you need a wider adjustment band, select a model with a larger -{adj} code like SCJ80X125-30.
If your application does not require stroke adjustment, the fixed-stroke SC80X125 is a simpler, more cost-effective alternative. For a direct replacement, match the 80 mm bore, 125 mm nominal stroke, 10 mm adjust range, PT3/8 ports, and the same mounting accessory from the SCJ subset (FA, LB, or TC). At 125 mm stroke, rod buckling is not a primary concern, but always ensure the load is guided to prevent side-loading on the rod bearing.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (reduced due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N. Always design for the required force at your specific working pressure.
Yes, if you need the 10 mm stroke-end adjustability. The SCJ80X125-10 shares the same bore, rod, and porting as the SC80, but the body is slightly longer to house the adjusting screw. Ensure the mounting and magnet options match your existing setup. If stroke adjustment is not needed, the standard SC80 is the direct replacement.
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