The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X175-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 175mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X175-20 is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a 175 mm nominal stroke and a 20 mm rear adjustable screw, giving you the ability to fine-tune the stroke end position on the fly. It delivers a substantial 2513 N push force at 0.5 MPa (4523 N at 0.9 MPa), driven by a 25 mm diameter piston rod through PT3/8 ports, making it a robust choice for medium-to-heavy linear positioning tasks.
This tie-rod cylinder includes an adjustable air cushion (28 mm length) for smooth deceleration and operates reliably between 30-800 mm/s. The body length A(SCJ) is 239 mm, which is slightly longer than the fixed-stroke SC version to accommodate the rear adjusting mechanism. The stroke is well within the 1500 mm maximum standard stroke for this bore, ensuring it is a readily available standard configuration.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X175-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 20 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. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20 mm adjuster lets technicians dial in the exact end-stop for a 175 mm stroke during initial machine setup, compensating for assembly tolerances without needing to shim or reposition the cylinder.
Quickly adapt a stop gate or diverter's throw from 155 mm to 175 mm for different box sizes on a packaging line, minimizing downtime between production runs.
In a pressing or clamping fixture, the stroke can be extended over time to compensate for pad wear, maintaining consistent contact force without replacing the tooling or the cylinder.
Choose the SCJ80X175-20 when your application demands a 175 mm stroke that you can tweak during commissioning or changeovers. If you need more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa. For a simpler, fixed-stroke solution without the rear adjuster, the standard SC80X175 is a direct alternative. This model is a direct replacement for another AirTAC SCJ80X175-20 with PT ports and basic mounting. For strokes of this length, ensure the load is guided to prevent side-loading and rod bending; if not, consider an external guide rail.
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 rod reducing the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
Yes, physically it will fit in the same space, though the SCJ body is slightly longer. The key benefit is the 20 mm adjustable screw, which gives you stroke-end flexibility the fixed SC model lacks. Ensure your porting (PT3/8) and mounting style match.
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