The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X120-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 120mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The AirTAC SCJ80X120-75 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing 2513 N of push force at 0.5 MPa. Its rear-cap adjusting screw allows the effective stroke to be shortened by up to 75 mm from the 120 mm nominal maximum, making it invaluable for fine-tuning end positions during commissioning or changeovers without replacing the cylinder or adding external hard stops.
This 80 mm bore cylinder features a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread for robust mechanical connections. The integrated air cushion, with a 21 mm cushion length, decelerates the piston smoothly at the end of travel, while the tie-rod construction ensures reliable service. The body length A(SCJ) is 239 mm, providing a compact envelope for its force class.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X120-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 120 mm |
| Stroke adjustment | Up to 75 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. |
| ×120 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Quickly dial in a new end-stop position for packaging machinery when switching between product sizes, eliminating the need for mechanical stop adjustments and reducing downtime.
In clamping or pressing fixtures, use the 75 mm adjustment screw to take up slack from tooling wear over time, maintaining consistent clamping force without reprogramming the machine.
Fine-tune the stroke end of a diverter arm on a conveyor system during initial setup to achieve perfect alignment with the branch line, compensating for minor fabrication tolerances.
Step up to an SCJ100 bore if your application demands more force, as the 100 mm model delivers 3927 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC80 series offers a simpler, more cost-effective solution. This SCJ80X120-75 is a direct replacement for any AirTAC SCJ80 cylinder with a 120 mm nominal stroke, a 75 mm adjustment range, PT ports, and basic mounting. For strokes of 300 mm or more, evaluate side-loading and rod bending; an external linear guide or a guided cylinder may be required to protect the rod bearings and seal.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder provides 2513 N of push force and 2268 N of pull force. The maximum push force at the 0.9 MPa operating limit is 4523 N.
Yes, but only if you need the adjustable stroke feature. The SCJ80X120-75 has the same bore, rod, and port dimensions as an SC80, but its body is slightly longer to house the adjusting screw. It is a direct physical and pneumatic match for another SCJ80 with the same nominal stroke and adjustment range.
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