The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X300-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ63X300-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a nominal 300mm stroke that can be fine-tuned down by up to 100mm via the rear-cap adjusting screw. This 63mm bore model delivers a push force of 1559 N at 0.5 MPa, making it a robust actuator for applications requiring precise end-position control. The built-in magnet (suffix -S) allows direct mounting of CMSG/DMSG/EMSG sensors for reliable piston position feedback.
With a 20mm diameter rod and PT1/4 ports, this tie-rod cylinder provides a 28mm air cushion to decelerate the piston quietly. The adjustable stroke end is ideal for commissioning trials, format changeovers, or taking up mechanical wear without replacing the cylinder. The body length A(SCJ) is 197mm, providing a compact footprint for its 300mm maximum stroke.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X300-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -100 | 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.
During machine commissioning, the 100mm adjustment range allows engineers to dial in the exact end-stop position for a 300mm stroke actuator without fabricating custom hard stops, speeding up the debugging process.
Ideal for packaging or assembly lines that switch between product sizes. The stroke can be quickly re-adjusted for different box heights or part lengths, eliminating the need to stock multiple fixed-stroke cylinders.
In high-cycle clamping or pressing fixtures, the adjustable screw can be turned to take up mechanical wear on tooling or seals, maintaining consistent clamping force and part quality over the cylinder's service life.
Choose the SCJ63X300-100S when your application demands a 300mm stroke that can be precisely shortened in the field. For higher force requirements, stepping up to an 80mm bore provides 2513 N of push force at the same pressure. If a fixed stroke is sufficient, the standard SC63X300 offers a simpler, non-adjustable alternative. For side-loads on a 300mm stroke, an external guide rail or a guided cylinder is recommended to prevent rod bending.
This model is a direct replacement for another AirTAC SCJ63 cylinder with a 300mm nominal stroke and a 100mm adjustment range, using PT ports and a basic mount. To add a pivoting mount, order the TC center trunnion with the F-SC63TC bracket. The built-in magnet ensures compatibility with your existing reed or solid-state sensor setup.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at 0.9 MPa is 2805 N. Because this is a single-rod cylinder, the pull force is lower due to the area of the 20mm rod.
The rear cap has an adjusting screw that acts as an internal, movable end-stop for the piston. By turning the screw, you can shorten the stroke end by up to 100mm from the nominal 300mm maximum. This adjusts the position, not the speed or force, and does not require disconnecting air lines.
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