The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X750-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 750mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X750-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a nominal 750 mm reach that can be fine-tuned down by up to 50 mm via a rear-cap adjusting screw. With a 63 mm bore, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, driven by a 20 mm diameter piston rod with M16x1.5 threads and PT1/4 ports.
This model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for precise end-of-stroke detection. The cylinder body length is 197 mm plus the stroke, and it features a 28 mm air cushion for smooth deceleration. It is a genuine AirTAC component built for reliable, repeatable positioning in automated systems.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X750-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 750 mm |
| Stroke adjustment | Up to 50 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. |
| ×750 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Technicians can precisely dial in the 50 mm adjustment range on the machine without swapping cylinders, speeding up initial system commissioning and fine-tuning for new tooling.
On packaging or sorting lines, the adjustable stroke allows operators to quickly adapt the cylinder's end position for different product sizes, minimizing downtime between batches.
In long-running clamping or pressing fixtures, the stroke can be incrementally adjusted to compensate for pad or tooling wear, maintaining consistent contact force without mechanical rework.
Choose the SCJ63X750-50S when you need a mid-range force actuator with the flexibility to dial in the exact stroke end position during commissioning or changeovers. If your application requires more force, stepping up to an 80 mm bore provides 2513 N of push at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore offers 982 N. This adjustable-stroke model is ideal when the final stroke length is not fixed at design time, unlike a fixed-stroke SC cylinder.
For a 750 mm stroke, consider the potential for rod deflection under side loads. If the load is not guided, an external guide rail or a guided cylinder should be used to prevent bending and seal wear. This SCJ cylinder is a direct replacement for any AirTAC SCJ63X750-50S with PT ports and a magnet, matching the same bore, nominal stroke, and 50 mm adjustment range.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, if you need the ability to adjust the stroke end. The SCJ63X750-50S has the same bore, port size, and mounting footprint as a standard SC63, but its body is slightly longer to accommodate the rear adjusting screw. It is a direct dimensional replacement for another SCJ63X750-50S with a magnet.
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