The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-40STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X500-40STC is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. Its rear-cap screw provides a 40 mm adjustable range, letting you dial in the exact 500 mm nominal stroke end position without dismounting the cylinder or adding external hard stops—ideal for commissioning trials, format changeovers, and compensating for tooling wear.
At 0.5 MPa, this 63 mm bore unit delivers 1559 N of push force and 1402 N on the pull stroke, using a 20 mm diameter piston rod. The built-in magnet (-S) allows direct mounting of CMSG/DMSG sensors, while the centre trunnion (TC) mount with included TCM1 bracket (F-SC63TC) supports pivoting applications. With a 28 mm air cushion and a body length A of 197 mm, it handles strokes up to 1500 mm as standard.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-40STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 40 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. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw allows engineers to quickly fine-tune the end-of-stroke position of a 500 mm stroke actuator for perfect part alignment without iterative cylinder swaps.
On packaging lines, the adjustable stroke lets operators reset the push-off position for different box sizes in minutes. The centre trunnion mount allows the cylinder to swing into position cleanly.
In a gluing or pressing station, the screw can be dialed in to set a precise, repeatable clamp depth. The 1559 N push force at 0.5 MPa provides substantial clamping power for wood or plastic assembly.
Step up to an 80 mm bore (2513 N push at 0.5 MPa) if the 1559 N output of this SCJ63 is marginal for your load, or drop to a 50 mm bore (982 N) for lighter, more compact actuation. For fixed-stroke applications where end-position tuning is not required, the standard SC63 series is a simpler, cost-effective alternative. This SCJ63X500-40STC is a direct replacement for an identical AirTAC SCJ adjustable-stroke cylinder: 63 mm bore, 500 mm nominal stroke, 40 mm adjust range, PT ports, centre trunnion mount, and magnet.
At a 500 mm stroke, ensure the rod is guided externally if significant side loads are present, or consider a guided cylinder to prevent rod bending and premature seal wear. The centre trunnion mounting is ideal for letting the cylinder pivot as it strokes, but the trunnion pins must be aligned precisely to avoid binding.
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 rod area. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The rear adjusting screw only changes the stroke end position, not the cylinder's force output.
It can replace another AirTAC SCJ63 adjustable-stroke cylinder with a 500 mm nominal stroke, 40 mm adjust range, PT ports, and centre trunnion mount. It is not a drop-in dimensional replacement for a fixed-stroke SC63, as the SCJ body is slightly longer to house the adjusting mechanism. The TC mount requires the TCM1 bracket for installation.
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