The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X30-30 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, 30mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X30-30 is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly on the machine. Its rear-cap adjusting screw provides up to 30 mm of end-position shift, letting you dial in the exact stop point during commissioning or changeover without swapping the cylinder. With a 63 mm bore and 20 mm piston rod, it delivers a solid 1559 N of push force at 0.5 MPa, rising to 2805 N at the 0.9 MPa maximum operating pressure.
At 197 mm, the SCJ body is slightly longer than a fixed-stroke SC of the same bore to house the adjustment mechanism. The standard PT1/4 ports and M16x1.5 rod thread keep integration simple, while the 28 mm air cushion at each end protects the end caps from impact. This basic-configuration model uses a tough TPU seal for standard temperatures from -20 to +70 °C.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X30-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 30 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. |
| ×30 | 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.
Dial in the precise retract or extend stop during initial machine setup, compensating for tooling stack-up without shims.
Quickly adjust the stroke end for different product sizes on a packaging line, reducing downtime between batches.
Take up mechanical play or seal wear over the cylinder's life by advancing the stroke end with a simple screw turn.
Choose the SCJ63X30-30 when you need to fine-tune a 30 mm stroke on the fly. If your load requires more force, stepping up to the 80 mm bore provides 2513 N push at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore delivers 982 N. This adjustable-stroke unit is the right pick over a fixed SC when your machine needs to accommodate part tolerances or format changes without external hard stops. For strokes of 300 mm or longer, evaluate side-loading on the 20 mm rod and consider adding an external guide or switching to a guided cylinder. A direct replacement must match the 63 mm bore, 30 mm nominal stroke, 30 mm adjust range, PT1/4 ports, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, it produces 1559 N pushing and 1402 N pulling. The maximum push force at 0.9 MPa is 2805 N. Because it is a single-rod cylinder, push force is always greater than pull force.
A rear screw shortens the stroke end by up to 30 mm from the 30 mm nominal maximum. It directly replaces an SC of the same bore and stroke only if you need the adjustability; otherwise, a fixed SC is simpler. The port size, rod thread, and mounting must match.
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