The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X300-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X300-10S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, delivering 1559 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 10 mm of stroke-end reduction, allowing precise fine-tuning during commissioning or format changes without swapping the cylinder. The 63 mm bore uses a 20 mm diameter rod and PT1/4 ports, with a 28 mm air cushion for smooth deceleration.
This model includes a built-in magnet, enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. With a body length of 197 mm and a 300 mm nominal stroke, it suits medium-force applications requiring sensor feedback and on-machine adjustability. The operating pressure range is 0.15–1.0 MPa, and the standard TPU seal works from -20 to +70 °C.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X300-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 10 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. |
| -10 | 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 setup, the 10 mm adjusting screw lets technicians dial in the exact stroke end position to align with mating parts, eliminating the need for shims or custom mechanical stops.
In clamping or pressing operations, the adjustable stroke can be gradually extended to compensate for tooling or pad wear over time, maintaining consistent contact force without replacing the cylinder.
For packaging or assembly lines running multiple product sizes, operators can quickly adjust the stroke end to accommodate different part heights, reducing changeover time and the need for multiple fixed-stroke cylinders.
Choose the 63 mm bore when the 50 mm bore’s 982 N push at 0.5 MPa is marginal; step up to the 80 mm bore (2513 N push) if your load exceeds the SCJ63’s 1559 N capability. This adjustable-stroke model is ideal when the stroke end must be dialled in after installation—if a fixed stroke is sufficient, the standard SC series offers a simpler, lower-cost alternative. At 300 mm of stroke, ensure the rod is adequately supported against side loads; consider an external linear guide or a guided cylinder if lateral forces are present.
For a direct replacement, match the 63 mm bore, 300 mm nominal stroke, and 10 mm adjust range. The port thread must be PT, and the built-in magnet (-S suffix) is required for sensor compatibility. This basic-mount cylinder has no mounting bracket, so verify your existing mounting style—FA front flange or LB foot brackets from the F-SC63 accessory range can be added if needed.
Adjustable-stroke checklist
The cylinder produces 1559 N of push force and 1402 N of pull force at 0.5 MPa. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 318 kgf. The rear adjusting screw only sets the stroke end position within a 10 mm range; it does not alter the bore size, piston area, or output force.
Yes, it can replace a fixed-stroke SC63X300 if the extra body length for the adjusting mechanism is accommodated. The replacement must match the 63 mm bore, 300 mm nominal stroke, PT port thread, and the built-in magnet option (-S). The SCJ63X300-10S provides the added benefit of a 10 mm field-adjustable stroke end, which the fixed-stroke SC does not offer.
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