The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-100S 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X450-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 450 mm nominal stroke by up to 100 mm without swapping the unit. Its 20 mm rod and PT1/4 ports deliver 1559 N of push force at 0.5 MPa, scaling to 2805 N at the 0.9 MPa maximum operating pressure, making it a robust mid-bore actuator for dynamic industrial tasks.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. The adjustable cushion decelerates the piston over a 28 mm zone, and the rear adjusting screw sets the stroke end position during commissioning or format changes, eliminating the need for external hard stops.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 450 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. |
| ×450 | 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.
On a packaging line that handles different box heights, the 100 mm adjustment range lets operators quickly reset the stroke end for each product run without mechanical stops, minimizing downtime between batches.
In a clamping or pressing fixture, the rear screw can be advanced to compensate for tooling or pad wear over thousands of cycles, maintaining consistent clamp force and position without replacing the cylinder.
During machine bring-up, engineers can incrementally adjust the 450 mm stroke in real time to find the optimal actuator travel for a new process, then lock the screw once the ideal setting is validated.
Choose the 63 mm bore SCJ when your application needs roughly 1560 N of push force at standard shop air. If you require more force, stepping up to the 80 mm bore provides 2513 N at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore offers 982 N. This adjustable-stroke model is the right pick when the exact stroke length must be dialed in on the machine—during commissioning, for wear take-up, or for multi-product changeovers. If your stroke is fixed and never needs adjustment, the standard SC fixed-stroke cylinder is a simpler, more economical alternative.
For this 450 mm stroke, be mindful of side loading. At full extension, a heavy or unguided load can create a bending moment on the 20 mm rod. If your application involves any off-axis force, pair the cylinder with an external guide rail or switch to a guided cylinder to protect the rod bearings and seals. As a direct replacement, match the 63 mm bore, 450 mm nominal stroke, 100 mm adjust range, PT port thread, basic mounting, and the -S magnet option to ensure sensor compatibility.
Adjustable-stroke checklist
At 0.5 MPa (5 bar), it generates 1559 N pushing and 1402 N pulling. The maximum push force at the 0.9 MPa operating limit is 2805 N. Because it is a single-rod cylinder, the pull force is always lower due to the rod area.
Yes, if you need the adjustable stroke feature. You must match the 63 mm bore, 450 mm nominal stroke, PT port thread, and the -S magnet option. The SCJ body is slightly longer to house the adjusting screw, so verify the available space in your machine.
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