The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X1000-50STC 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. Ø63mm bore, 1000mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X1000-50STC is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a nominal 1000 mm stroke, offering a substantial 50 mm field-adjustable range via a rear-cap screw. This allows precise, on-machine fine-tuning of the stroke end position without swapping the cylinder. At a standard 0.5 MPa operating pressure, it delivers 1559 N of push force and 1402 N on the pull stroke, making it a strong contender for heavy-duty positioning tasks.
This specific model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and is equipped with a centre trunnion (TC) mount, which includes the TCM1 bracket for pivoting applications. The 20 mm rod and PT1/4 ports are standard for this bore, and the 28 mm air cushion provides smooth deceleration at the end of its long stroke. The body length A(SCJ) is 197 mm, slightly longer than a fixed-stroke SC to accommodate the adjustment mechanism.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X1000-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 1000 mm |
| Stroke adjustment | Up to 50 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. |
| ×1000 | 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 is ideal for dialing in the exact stop position during initial machine commissioning on large-format equipment, eliminating the need to machine custom stops or swap out fixed-stroke cylinders.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be used to periodically take up for wear on tooling or contact surfaces, maintaining consistent clamping force without reprogramming the machine's end-stop logic.
The 1000 mm stroke and centre trunnion mount allow this cylinder to pivot and precisely position a long diverter arm or heavy stop gate on a conveyor line, with the adjustment screw setting the final gate angle.
Choose the SCJ63 series when your application requires a robust force output and the flexibility to adjust the stroke end by up to 50 mm on the fly, such as for commissioning or format changes. If 1559 N of push force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N. For applications where the stroke is permanently fixed and never needs adjustment, the standard SC63 fixed-stroke cylinder is a more economical choice.
For this 1000 mm stroke length, managing side loads is critical to prevent rod bending and premature seal wear. Always ensure the load is guided externally or consider a guided cylinder if the rod must bear a non-axial load. This SCJ63X1000-50STC is a direct replacement for any AirTAC SCJ adjustable cylinder of the same bore, 1000 mm nominal stroke, 50 mm adjust range, PT port thread, and TC centre trunnion mounting with a magnet.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 1559 N, and the pull force is 1402 N due to the 20 mm single rod. At the maximum operating pressure of 1.0 MPa, the push force reaches 3117 N. The 50 mm stroke adjustment does not alter these force values.
No. The SCJ series does not support CA or CB clevis mounts. This specific model has a TC centre trunnion mount. For a direct replacement, you must match the bore, nominal stroke, adjust range, and use an SCJ-compatible mount like the TC, FA, or LB. A clevis-mounted SC would require a machine redesign to use an SCJ.
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