The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-50H 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-50H delivers a robust 1559 N of push force at 0.5 MPa, making it a reliable workhorse for medium-duty automation tasks requiring thermal resilience. Its 50 mm rear-end adjustment range allows operators to dial in the exact stroke end position on the fly, a critical advantage during high-temperature commissioning or format changes.
Equipped with Viton (FKM) seals, this cylinder operates reliably in ambient temperatures from 0 to 150 °C, far exceeding the standard polyurethane range. The 20 mm piston rod and 28 mm air cushion provide smooth, consistent deceleration, while the PT1/4 port ensures compatibility with common pneumatic fittings.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-50H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 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. |
| ×150 | 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.
The Viton seals and 150°C rating make this cylinder ideal for actuating platens or clamps in heated laminating and forming presses where standard seals would quickly degrade.
Fine-tune the end stop by up to 50 mm without dismounting the cylinder, enabling rapid mechanical setup between different product sizes on packaging or assembly lines.
Use the adjustable stroke to compensate for material wear or fixture settling over long-duration cyclic testing, maintaining precise displacement without manual recalibration.
Step up to the SCJ80 for a substantial force increase to 2513 N push at 0.5 MPa, or down to the SCJ50 for a more compact 982 N alternative. This SCJ63X150-50H is the direct replacement for any AirTAC SCJ63 adjustable-stroke cylinder with a 150 mm nominal stroke and 50 mm adjustment, specifically in the H (Viton) seal variant with PT ports. For applications where the stroke length exceeds 300 mm, consider adding an external guide rail to protect the 20 mm rod from side-load deflection.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this double-acting cylinder generates 1559 N of push force and 1402 N on the pull stroke due to the 20 mm rod area. Maximum theoretical push force at 1.0 MPa is 318 kgf.
The '50' specifies a 50 mm stroke adjustment range via the rear screw. The 'H' denotes Viton (FKM) seals, which change the operating temperature range to 0–150 °C, making it suitable for hot environments unlike the standard TPU seal.
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