The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-50 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, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-50 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw gives you up to 50 mm of field-adjustable stroke reduction from the 80 mm nominal maximum, so commissioning teams can dial in the exact end position without changing the cylinder or adding external hard stops. The 20 mm piston rod and 28 mm air cushion work together to handle deceleration loads smoothly.
With a push force of 1559 N at 0.5 MPa and 2805 N at the 0.9 MPa maximum operating pressure, this 63 mm bore unit sits in a force class suited for medium-duty clamping, pressing, and positioning tasks. The tie-rod construction keeps it serviceable, and the PT1/4 ports fit common pneumatic plumbing. Body length A is 197 mm, giving a compact envelope for the force it delivers.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
During machine bring-up, the 50 mm adjustment range lets technicians fine-tune the stroke end position to match tooling tolerances without cutting brackets or re-mounting the cylinder.
When clamping parts that vary in thickness batch-to-batch, the rear screw adjusts the clamp jaw's closed position quickly, maintaining consistent force without reprogramming the PLC.
As gripper pads or press tooling wear over thousands of cycles, the adjustable stroke end compensates for the lost material, restoring the original contact point without disassembling the actuator.
Step up to the 80 mm bore SCJ80X80-50 if your application needs more push force—the 80 mm delivers 2513 N at 0.5 MPa, a meaningful jump for heavier tooling. Step down to the 50 mm bore SCJ50X80-50 (982 N at 0.5 MPa) when space and weight matter more than raw force. If your stroke length is fixed and never needs field adjustment, a standard SC63X80 fixed-stroke cylinder saves cost and eliminates the adjusting screw. For a direct replacement, match the 63 mm bore, 80 mm nominal stroke, 50 mm adjust range, PT thread, and basic mounting; the SCJ is not dimensionally interchangeable with ISO 15552 cylinders, so only another AirTAC SCJ of the same configuration is a true drop-in fit.
Adjustable-stroke checklist
Push force is 1559 N at 0.5 MPa, 2182 N at 0.7 MPa, and 2805 N at the maximum operating pressure of 0.9 MPa. Pull force is lower because of the single 20 mm rod: 1402 N at 0.5 MPa. The adjusting screw does not change the force—it only sets the stroke end position.
No. The SCJ is an AirTAC tie-rod cylinder, not an ISO 15552 profile cylinder. Mounting dimensions, port locations, and accessory brackets differ. A direct replacement requires another AirTAC SCJ adjustable-stroke cylinder with the same 63 mm bore, 80 mm nominal stroke, 50 mm adjust range, and PT port thread.
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