The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X550-100S 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, 550mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X550-100S is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, scaling up to 2805 N at the maximum operating pressure of 0.9 MPa. Its defining feature is the rear-cap adjusting screw, which provides a 100 mm field-adjustable stroke-end range, allowing you to fine-tune the 550 mm nominal stroke on the fly without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The 20 mm piston rod with M16x1.5 male threads and PT1/4 ports handles substantial side loads, while the 28 mm air cushion at each end decelerates the piston quietly. The body length A(SCJ) is 197 mm plus stroke, making it a compact solution for format changeovers and commissioning trials.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X550-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 550 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. |
| ×550 | 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.
The 100 mm adjustment screw lets technicians dial in the exact stroke end position during machine commissioning, eliminating the need to cut and try fixed hard stops.
On packaging or assembly lines, operators can quickly adjust the stroke to accommodate different product sizes without mechanical modifications, minimizing downtime between batches.
In clamping or pressing applications, the adjustable stroke can be periodically tweaked to take up for tooling or pad wear, maintaining consistent contact force and position over the machine's life.
Step up to the 80 mm bore SCJ80 series if your application demands more than the 1559 N push force this 63 mm bore provides at 0.5 MPa—the SCJ80 delivers 2513 N at the same pressure. For a simpler, fixed-stroke solution where no in-field adjustment is needed, the standard SC63 is a direct alternative. When replacing this unit, match the 63 mm bore, 550 mm nominal stroke, 100 mm adjustment range, PT port thread, and the -S magnet option; the basic mounting configuration requires no additional brackets.
At a 550 mm stroke, rod deflection under side load becomes a design consideration. If your application imposes lateral forces, pair this cylinder with an external guide rail or consider a guided cylinder to protect the rod and bearing from premature wear.
Adjustable-stroke checklist
At 0.5 MPa, push force is 1559 N and pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return stroke.
Yes, this is a direct replacement for any AirTAC SCJ63 adjustable-stroke cylinder with a 550 mm nominal stroke, 100 mm adjustment range, PT ports, and a built-in magnet. Verify that your mounting style matches the basic (no bracket) configuration, or order the correct mounting accessory separately.
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