The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X180-50S 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, 180mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X180-50S is an 80 mm bore double-acting single-rod pneumatic cylinder with a 50 mm rear-cap stroke adjustment screw, letting you fine-tune the stroke end from 130 mm up to the nominal 180 mm without changing the cylinder. Its 25 mm diameter piston rod and 28 mm air cushion deliver controlled deceleration, while the built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
At 0.5 MPa this cylinder pushes with 2513 N and pulls with 2268 N, placing it in a mid-range force class suitable for pressing, clamping, and positioning tasks. The PT3/8 port and M20x1.5 rod thread provide standard connectivity, and the tie-rod construction keeps service simple. The body length A(SCJ) is 239 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X180-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 180 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. |
| ×180 | 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.
The 50 mm rear screw lets technicians dial in the exact stroke end during machine commissioning without swapping cylinders or machining external stops, saving hours of setup time.
On packaging or assembly lines that run multiple product sizes, the adjustable stroke allows operators to quickly reset the cylinder's end position between batches with a simple screw adjustment.
In pressing or clamping fixtures where tooling wears over time, the stroke-end screw can be advanced to take up the gap, maintaining consistent contact force without reprogramming the machine.
Choose the SCJ80 bore when your application needs roughly 2500 N of push force at standard shop air. If you need more force, the SCJ100 delivers 3927 N push at 0.5 MPa; if you can accept less, the SCJ63 provides 1559 N. The 50 mm adjustment range is ideal for commissioning trials or format changeovers where the exact stroke end must be dialled in on the machine.
For a direct replacement, match the 80 mm bore, 180 mm nominal stroke, 50 mm adjust range, PT port thread, and the built-in magnet (S). This model uses a basic mount; if your application requires a pivoting motion, specify the TC centre trunnion with TCM1 bracket instead. For strokes of 180 mm, rod buckling is generally not a concern under axial loads, but if side loads are present, add an external guide rail or consider a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (the difference is due to the single rod area). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The theoretical force at 1.0 MPa is 513 kgf.
The SCJ80X180-50S has the same bore, rod diameter, port size, and mounting footprint as an SC80, but the body is longer (239 mm A-length) to house the adjusting screw. It will fit if you have clearance for the extra length and you need the 50 mm field-adjustable stroke-end feature.
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