The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30H 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. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X50-30H is a double-acting, single-rod pneumatic cylinder engineered for applications requiring fine-tuning of the piston stroke end position. Its rear-cap adjusting screw provides a 30 mm adjustment range, allowing operators to dial in the exact stroke end without replacing the cylinder or adding external hard stops. This model is built with high-temperature Viton (FKM) seals, extending its operating range from 0 to +150 °C, making it suitable for hot environments where standard seals would degrade.
With a 50 mm bore and a 20 mm piston rod, this cylinder delivers a substantial push force of 982 N at 0.5 MPa and up to 1767 N at its maximum operating pressure of 0.9 MPa. The pull force is 825 N at 0.5 MPa, reflecting the single-rod design. The integrated air cushion is 21 mm long, providing reliable deceleration for the 50 mm nominal stroke, and the body length is 194 mm. This genuine AirTAC unit is a robust solution for high-temperature, adjustable-stroke applications.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | 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.
Fine-tune the final pressing depth in a heated laminating or forming press. The 30 mm adjustment screw allows operators to compensate for tooling wear or material thickness changes without disassembling the hot tooling, while the Viton seals withstand the elevated process temperatures.
Set the precise retraction point for a dispensing needle in a heated adhesive or solder paste application. The adjustable stroke end allows for quick calibration during product changeovers, ensuring consistent deposit volumes in a demanding thermal environment.
Adjust the stroke end of a clamping cylinder on a thermal forming machine. The 30 mm range is ideal for dialing in the exact clamp position for different mold heights, while the FKM seals provide reliable, long-life performance against the radiated heat.
Select the SCJ50X50-30H when you need to precisely set a short stroke end position in a hot environment. If your force requirement is lower, stepping down to a 40 mm bore provides 628 N of push force at 0.5 MPa. For a significant increase in force, the 63 mm bore offers 1559 N at the same pressure. If you do not need the stroke adjustment feature, a fixed-stroke SC50X50 cylinder is a more economical alternative. For an exact replacement, match the 50 mm bore, 50 mm nominal stroke, 30 mm adjustment range, PT port thread, and Viton seal material.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at 0.9 MPa is 1767 N. The pull force is lower because the piston rod reduces the effective area on the return stroke.
To be a direct replacement, the new cylinder must match the 50 mm bore, 50 mm nominal stroke, and 30 mm stroke adjustment range. You must also verify the mounting style, PT port thread, and that the seal material is Viton (FKM) for high-temperature compatibility.
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