The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30H 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. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-30 is a 63 mm bore double-acting single-rod cylinder with a 30 mm rear adjusting screw, letting you fine-tune the stroke end position on the machine without swapping the cylinder. At 0.5 MPa air pressure it delivers 1559 N push and 1402 N pull force, while at the maximum operating pressure of 0.9 MPa the push force reaches 2805 N.
This model is built with Viton (FKM) seals, extending the operating temperature range to 0–150 °C for hot or chemically aggressive environments. The 20 mm diameter piston rod uses an M16×1.5 thread, the air cushion is 28 mm long, and the SCJ body length A is 197 mm. Standard PT ports are 1/4 inch.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30H |
|---|---|
| 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 adjusting screw lets technicians dial in the exact end-of-stroke position for a 63 mm bore actuator without fabricating custom hard stops, saving hours of mechanical rework.
With Viton seals rated to 150°C, this SCJ63X50-30 suits clamping fixtures near ovens or heated platens where standard seals would degrade. The 1559 N push force securely holds parts during thermal processing.
On high-cycle assembly stations, tooling pads wear over time. The rear adjusting screw provides 30 mm of take-up to restore the precise 50 mm nominal stroke position without replacing the cylinder or adding shims.
Choose the SCJ63 when you need roughly 1560 N of push force at standard plant air. If your load is lighter and space is tight, step down to the 50 mm bore SCJ50 which provides 982 N push at 0.5 MPa. For heavier fixtures requiring about 2513 N push, move up to the 80 mm bore SCJ80.
This adjustable-stroke cylinder is the right pick when you need to dial in an end stop during commissioning or format changes. If your application only needs a fixed, repeatable stroke every cycle, the standard SC63 fixed-stroke cylinder is a simpler, lower-cost alternative. To replace this exact model, match the 63 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT port thread, and Viton seal code H. The SCJ63 uses the same mounting accessories as the SC63 family: basic, FA front flange, LB foot, or TC centre trunnion with TCM1 bracket.
Adjustable-stroke checklist
At 0.5 MPa (roughly 73 psi) the push force is 1559 N and the pull force is 1402 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, push force increases to 2805 N.
Yes, if you need the field-adjustable stroke feature. The SCJ63X50-30 shares the same 63 mm bore, PT 1/4 ports, and SC-series mounting accessories (FA, LB, TC). Its body is slightly longer to house the adjusting screw, so check the 197 mm body length A against your available space. The adjustable screw shortens the stroke end by up to 30 mm from the 50 mm nominal maximum.
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