The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X180-50 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, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X180-50 is a 63 mm bore, double-acting, single-rod pneumatic cylinder with a 180 mm nominal stroke and a 50 mm rear adjusting screw, giving you an effective stroke that is field-adjustable from 130 mm to 180 mm. This puts it in the 1559 N push force class at 0.5 MPa, making it a solid choice for applications where the final stop position needs to be dialled in precisely during commissioning or changeover.
The 20 mm diameter piston rod and 28 mm air cushion length are shared with the fixed-stroke SC series, but the SCJ body length A is slightly longer at 197 mm to accommodate the adjusting mechanism. The tie-rod construction uses a PT1/4 port and an M16x1.5 rod thread, delivering a maximum push force of 2805 N at the 0.9 MPa operating limit.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X180-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 180 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. |
| ×180 | 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 50 mm adjustment range lets technicians fine-tune the stroke end position on a new machine without machining custom stops, speeding up the final setup and alignment of pressing or clamping stations.
Quickly adapt a diverter gate or pusher arm to a new box or pallet size. The rear screw adjusts the cylinder's reach in seconds, eliminating the downtime of swapping to a different fixed-stroke cylinder.
In repetitive pressing or riveting operations, tooling can wear down over time. The adjustable stroke allows operators to extend the piston's end position slightly to maintain consistent contact pressure without replacing the tooling immediately.
Step up to an 80 mm bore SCJ if your application needs more than the 1559 N push force this model delivers at 0.5 MPa; the SCJ80 provides 2513 N. If you do not require field-adjustable stroke and prefer a simpler, slightly shorter body, the fixed-stroke SC63 series is a direct alternative. For a drop-in replacement, match the 63 mm bore, 180 mm nominal stroke, 50 mm adjust range, PT1/4 ports, and basic mounting.
At a 180 mm stroke, rod deflection under side load is generally not a concern, but if your tooling applies any lateral force, an external guide rail or a switch to a guided cylinder will protect the rod bearing and seals from premature wear.
Adjustable-stroke checklist
Because it is a single-rod cylinder, push and pull forces are different. At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
Yes, if you need the adjustable stroke feature. The SCJ shares the same bore, rod diameter (20 mm), port size (PT1/4), and mounting accessories as the SC63. The SCJ body is slightly longer (A=197 mm) to house the rear adjusting screw, so ensure you have clearance at the cap end.
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