The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30S 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 SCJ63X50-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop by up to 30 mm without swapping the unit. Its 63 mm bore delivers 1559 N of push force at 0.5 MPa, making it a robust choice for applications that need both power and precise end-position tuning.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The 20 mm rod and PT1/4 ports keep it compatible with common pneumatic circuits, while the 28 mm air cushion decelerates the piston smoothly at each end of travel.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30S |
|---|---|
| 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.
During machine commissioning, the 30 mm adjustment screw lets technicians dial in the exact stroke end position to align with tooling or stops, eliminating the need for shims or custom spacers.
On packaging or assembly lines, quickly adjust the cylinder stroke to handle different product sizes or formats without mechanical rework, minimizing downtime between batches.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be tweaked over time to compensate for pad or tooling wear, maintaining consistent clamping force and position.
Choose the 63 mm bore when the 50 mm bore's 982 N push force at 0.5 MPa is marginal; it provides a substantial step up in power. If your application does not require stroke adjustment, the fixed-stroke SC63 series offers a simpler, more compact alternative. For a direct replacement, match the 63 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet. This model uses the basic mounting style; add FA, LB, or TC mounting kits if a fixed mounting point is needed.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 1559 N pushing and 1402 N pulling. The maximum push force at the 0.9 MPa operating limit is 2805 N. The force is identical to a fixed-stroke SC63 cylinder of the same bore.
You can replace a fixed-stroke SC63 with this SCJ63X50-30S if you need the 30 mm stroke adjustment feature and the built-in magnet. Ensure the nominal stroke, port size (PT1/4), and mounting style match your current setup. The SCJ body is slightly longer to house the adjusting screw.
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