The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-50SFA 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, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X150-50SFA is an 80 mm bore adjustable-stroke cylinder offering a nominal 150 mm stroke with a 50 mm rear-end adjustment range. This allows you to fine-tune the stroke end position on the machine without replacing the cylinder. It delivers a push force of 2513 N at 0.5 MPa and 4523 N at 0.9 MPa, using a 25 mm diameter piston rod.
This model is factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and an FA front rectangular flange for secure panel or end-face mounting. The body length A(SCJ) is 239 mm, and the cylinder uses a PT1/8 port with an M20x1.5 rod thread. Its adjustable air cushion decelerates the piston smoothly at the end of the stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-50SFA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 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. |
| ×150 | 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 adjustment range lets technicians dial in the precise end-stop during initial machine setup, compensating for small stack-up tolerances without needing to re-machine mounting brackets.
Quickly adapt the stroke end position for different product sizes on a packaging or assembly line. The rear adjusting screw enables a fast mechanical changeover between batches.
In high-cycle clamping or pressing applications, the adjustable stroke can be used to take up wear on tooling or contact surfaces over time, maintaining consistent process force and position.
Choose this SCJ80 model when you need the force of an 80 mm bore—2513 N push at 0.5 MPa—with the flexibility to dial in the stroke end by up to 50 mm. If your application requires less force, the 63 mm bore provides 1559 N of push, while stepping up to a 100 mm bore delivers 3927 N. The front flange (FA) mounting is ideal for rigid, end-mounted installations where the cylinder body is supported from the rod end.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 150 mm nominal stroke, 50 mm adjustment range, PT port thread, FA front flange mount, and a built-in magnet. If your stroke is fixed and never needs field adjustment, a standard SC fixed-stroke cylinder with the same bore and mounting is a simpler alternative.
Adjustable-stroke checklist
The theoretical push force is 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is lower at 2268 N at 0.5 MPa because the 25 mm piston rod reduces the effective piston area on the return stroke.
A screw mechanism in the rear cap allows you to shorten the stroke end position by up to 50 mm. The 150 mm in the model code is the maximum nominal stroke. The screw only sets the stroke end; it does not adjust force or speed, and it is not a locking device to hold a load without air pressure.
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