The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-50 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, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X50-50 is an 80 mm bore, double-acting single-rod cylinder with a rear adjusting screw that provides up to 50 mm of field-adjustable stroke reduction. This allows fine-tuning the end position without changing the cylinder, ideal for commissioning and format changes. It delivers 2513 N of push force at 0.5 MPa, with a 25 mm diameter piston rod and PT3/8 ports.
At 0.9 MPa maximum operating pressure, the push force reaches 4523 N. The body length A(SCJ) is 239 mm, and it features an adjustable air cushion of 28 mm for smooth deceleration. The standard stroke for this model is 50 mm, well within the 1500 mm maximum for the 80 bore.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 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. |
| ×50 | 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 end-of-stroke position during initial machine setup without mechanical modifications. The 50 mm adjustment range allows operators to quickly dial in the exact stopping point for a new tool or fixture.
Adjust the stroke on-the-fly for packaging or material handling lines that switch between product sizes. The rear screw makes it easy to accommodate different box heights or pallet dimensions.
Take up mechanical play or seal wear over time by slightly extending the effective stroke. This keeps the actuator performing accurately without immediate replacement, extending service intervals.
Choose the SCJ80X50-50 when you need to dial in a precise stroke end on an 80 mm bore actuator without swapping cylinders. If 2513 N of push force is insufficient, stepping up to the 100 bore provides 3927 N at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC80X50 is a direct alternative with identical mounting dimensions.
A direct replacement must match the 80 mm bore, 50 mm nominal stroke, 50 mm adjust range, PT3/8 ports, and basic mounting. The SCJ uses a tie-rod body and is not dimensionally interchangeable with ISO 15552 profiles.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N due to the 25 mm rod reducing the piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force increases to 4523 N.
A rear-cap adjusting screw limits the piston's forward travel, allowing you to shorten the nominal 50 mm stroke by up to 50 mm. It sets the stroke end position and does not affect the cylinder's force or speed capabilities.
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