The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-40 delivers a robust 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), making it a solid choice for medium-duty automation tasks that need on-the-fly stroke tuning. Its rear-cap adjusting screw provides a 40 mm stroke-end reduction range, so you can dial in the exact stop position without swapping the cylinder or adding external hard stops.
This tie-rod cylinder uses a 20 mm diameter piston rod and PT1/4 ports, with an adjustable air cushion that decelerates the 63 mm bore piston smoothly over a 28 mm cushion length. The body length A(SCJ) is 197 mm, and the maximum standard stroke for this bore is 1500 mm, giving plenty of room for longer-stroke variants in the same family.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Fine-tune the end stop during machine bring-up without removing the cylinder. The 40 mm screw adjustment lets technicians quickly compensate for stack-up tolerances in welded frames or assembled tooling.
On packaging or labeling lines, operators can adjust the stroke end to match different box sizes or product heights. The SCJ63X150-40 eliminates the need to stock multiple fixed-stroke cylinders for each format.
In pressing or clamping fixtures, the adjustable stroke compensates for pad wear over time. A quick turn of the rear screw restores the original clamp position without shimming or replacing the tooling.
Step up to the 80 mm bore if you need more muscle—the SCJ80 pushes 2513 N at 0.5 MPa. If your stroke length is fixed and never changes, a standard SC63 fixed-stroke cylinder removes the adjustment mechanism for a simpler, slightly shorter package. For a drop-in replacement, match the 63 mm bore, 150 mm nominal stroke, 40 mm adjust range, PT thread, and basic mounting; adding the -S magnet option enables CMSG/DMSG sensor mounting for end-of-stroke detection. At 150 mm stroke, rod bending from side loads is generally minimal, but for any off-axis force, add an external guide rail to protect the rod and bearing.
Adjustable-stroke checklist
At 0.5 MPa, 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 piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N.
Yes, if your existing cylinder is an AirTAC SCJ63 with a 150 mm nominal stroke, 40 mm adjust range, PT ports, and basic mounting. The adjustable-stroke design is specific to the SCJ series; a fixed-stroke SC cylinder cannot be adjusted in the field and would require a different mounting length.
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