The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X160-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X160-20 is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, making it a capable mid-range actuator for industrial tasks. Its defining feature is a rear-cap adjusting screw that provides up to 20 mm of stroke-end adjustment, allowing you to dial in the exact stopping position on the machine without replacing the cylinder or adding external hard stops.
With a 20 mm rod, PT1/4 ports, and a 28 mm air cushion, this tie-rod cylinder is built for reliable cycling. The 160 mm nominal stroke is well within the 1500 mm maximum for the 63 mm bore, and the SCJ body length A is 197 mm. This unit comes in a basic configuration with no magnet, TPU seals, and standard PT threads.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X160-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 20 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. |
| ×160 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20 mm adjustment screw lets technicians fine-tune the actuator's end-stop by hand, eliminating the need to fabricate shims or reposition sensors for a perfect fit.
On a packaging line, the adjustable stroke allows operators to quickly adapt the cylinder's reach for a new box size or product format, slashing changeover time compared to fixed-stroke cylinders.
In a clamping or pressing operation, the stroke can be incrementally extended over the cylinder's service life to compensate for wear on tooling or seals, maintaining consistent clamping force without replacing parts.
Step up to the 80 mm bore if your application demands more than the SCJ63's 2805 N of push force at 0.9 MPa; the SCJ80 delivers 4523 N. For applications where the stroke never needs field adjustment, the fixed-stroke SC63X160 is a simpler, more cost-effective alternative. This SCJ63X160-20 is a direct dimensional replacement only for another AirTAC SCJ63 cylinder with a 160 mm nominal stroke, a 20 mm adjustment range, PT ports, and the same basic mounting.
At a 160 mm stroke, the piston rod is well-supported, but if you are applying a significant side load, consider an external guide rail or switch to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The force increases with pressure, reaching a maximum push force of 2805 N at the 0.9 MPa operating limit. The push force is higher because the single rod reduces the piston area on the return stroke.
It is a direct replacement for another AirTAC SCJ63 adjustable-stroke cylinder with a 160 mm nominal stroke and a 20 mm adjustment range. Ensure the port thread (PT), mounting style (basic), and magnet option (none) match your original unit. It is not a drop-in replacement for a fixed-stroke SC or an ISO 15552 cylinder.
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