The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-30STC is a double-acting, single-rod pneumatic cylinder with a 63 mm bore, a nominal 50 mm stroke, and a rear-cap adjusting screw providing a 30 mm field-adjustable range. This configuration delivers a push force of 1559 N at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, using a 20 mm diameter piston rod and PT1/4 ports.
Equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount, this unit is supplied with the TCM1 bracket (order code F-SC63TC) for pivoting applications. The 28 mm air cushion decelerates the piston smoothly, and the adjusting screw allows operators to fine-tune the stroke end position without replacing the cylinder.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 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. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Quickly adjust the end stop for different product sizes on packaging or labeling machines without mechanical rework, saving significant setup time.
Fine-tune the gate opening on a conveyor diverter to handle varying package widths, using the trunnion mount for the required pivoting motion.
Dial in the precise actuator stroke during initial machine setup or compensate for mechanical wear over time, ensuring consistent operation.
Choose the SCJ63 series when your application requires a mid-range force of 1559 N push at 0.5 MPa, ideal for tasks needing more power than the 40 mm bore (628 N) but without stepping up to the 80 mm bore (2513 N). The 30 mm adjustable stroke is perfect for commissioning trials or format changeovers where the end position must be dialed in precisely on the machine. If a fixed stroke is sufficient, consider the standard SC63 series.
For replacement, match this model directly: an AirTAC SCJ63 with a 50 mm nominal stroke, a 30 mm adjust range, PT ports, a centre trunnion mount, and a magnetic piston. The TC mount suits swinging loads, but ensure the load is guided externally to prevent excessive side-load on the rod.
Adjustable-stroke checklist
At 0.5 MPa, it provides 1559 N of push force and 1402 N of pull force. The maximum push force at the 0.9 MPa operating limit is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
A rear-cap screw mechanically limits the piston's stroke end by up to 30 mm. It is a position adjuster, not a lock or brake. If the load must be held without air pressure, you will need an external rod lock or a pilot-operated check valve.
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