The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X100-20S is a double-acting, single-rod tie-rod cylinder that lets you fine-tune the stroke end position by up to 20 mm via a rear adjusting screw, without removing the unit from the machine. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa, making it a solid choice for mid-range clamping and positioning tasks.
The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG sensors along the barrel for reliable end-of-stroke detection. It uses a PT1/4 port, an M16x1.5 rod thread, and a 28 mm air cushion to decelerate the piston quietly. The body length A(SCJ) is 197 mm, providing a compact footprint for its 100 mm nominal stroke.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 20 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Fine-tune the end-stop during initial machine setup to dial in the exact stroke needed for a new fixture or tool, saving hours of bracket fabrication.
Quickly adjust the stroke end to accommodate different product heights on a packaging line without swapping the cylinder or adding mechanical stops.
Take up mechanical play or seal wear in a clamping application by slightly extending the effective stroke via the rear screw, maintaining consistent clamp force.
Choose the SCJ63X100-20S when you need to dial in a precise stop point during commissioning or format changes. If your force requirement grows, stepping up to the 80 mm bore provides 2513 N of push at 0.5 MPa. For a simpler, fixed-stroke solution where adjustability is not needed, the standard SC63X100 is the direct alternative. A drop-in replacement must match the 63 mm bore, 100 mm nominal stroke, 20 mm adjustment range, PT1/4 ports, and the -S magnet option. For strokes of 300 mm or longer, consider an external guide rail or a guided cylinder to protect the 20 mm rod from side-load deflection.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa and 2805 N at 0.9 MPa. The pull force is lower due to the single 20 mm rod, providing 1402 N at 0.5 MPa.
Yes, if you need the 20 mm stroke adjustment feature. The mounting footprint and port locations are identical. Ensure you order the -S magnet version if your original SC used sensors, and confirm the PT1/4 port thread matches your existing fittings.
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