The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X300-100 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 SCJ63X300-100 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands via a rear-cap adjusting screw. With a 63 mm bore and a nominal 300 mm stroke, it delivers 1559 N of push force at a standard 0.5 MPa supply, while the 100 mm adjustment range lets you dial back the stroke end without dismounting the cylinder or adding external hard stops.
This tie-rod cylinder uses a 20 mm piston rod with an M16x1.5 thread and PT1/4 ports. Its 28 mm air cushion decelerates the piston smoothly, and the body length A(SCJ) is 197 mm, making it a compact solution for applications where the stroke must be adapted during commissioning, format changeovers, or to compensate for tooling wear.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X300-100 |
|---|---|
| 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.
Dial in the exact stroke end position during machine startup without swapping cylinders. The 100 mm adjustment range lets technicians fine-tune the actuator's stop point for perfect alignment with mating parts.
Quickly adapt a pusher or diverter station to new box or pallet sizes. The rear screw adjusts the stroke end in seconds, reducing downtime between production runs on packaging lines.
Take up mechanical play or tooling wear over time by slightly shortening the stroke end. This keeps clamping, pressing, or stopping operations precise without replacing the entire cylinder.
Step up to an 80 mm bore if your load exceeds the SCJ63's 1559 N push at 0.5 MPa—the SCJ80 provides 2513 N. For purely fixed-stroke tasks, the standard SC63 series eliminates the adjustment mechanism. This model is a direct replacement for another AirTAC SCJ63X300-100 with the same PT ports, basic mounting, and no magnet. For strokes of 300 mm and above, ensure the rod is not subjected to side loads; if lateral forces are present, add an external guide rail or switch to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force (the difference is due to the single 20 mm rod). At the maximum operating pressure of 1.0 MPa, push force reaches 2805 N.
The SCJ63X300-100 is a direct dimensional replacement only for another AirTAC SCJ63 adjustable-stroke cylinder with the same 300 mm nominal stroke and 100 mm adjustment range. It is not a drop-in for a fixed-stroke SC63, as the rear adjusting screw adds to the overall body length.
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