The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X40-30S 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X40-30S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides a 30 mm field-adjustable range, letting you dial in the exact stop position without swapping the cylinder or adding external hard stops. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force at 0.5 MPa, scaling up to 2805 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The cylinder body length A(SCJ) is 197 mm, and the adjustable air cushion decelerates the piston smoothly over the final 28 mm of travel. It uses PT1/4 ports and an M16x1.5 rod thread, matching the standard SCJ63 mounting ecosystem.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X40-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 40 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. |
| ×40 | 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.
During machine setup, the 30 mm screw adjustment lets technicians precisely set the retract stop for a pick-and-place jaw without iterative shimming or bracket rework.
On a packaging line, the adjustable stroke compensates for mechanical wear on a stripper plate stop, restoring accurate positioning by simply turning the rear screw.
When a carton erector switches between box sizes, the operator can quickly adjust the SCJ63's stroke end to match the new flap-folding depth without changing the cylinder.
Choose the SCJ63 when your application needs roughly 1560 N of push at standard plant air. If that force is marginal, stepping up to the SCJ80 bore provides 2513 N push at the same 0.5 MPa. If you do not need field-adjustable stroke and prefer a simpler, slightly shorter body, the fixed-stroke SC63 is the direct alternative. For replacement, match the SCJ63 with a 40 mm nominal stroke, the 30 mm adjust range (-30), PT1/4 ports, and the -S magnet option. The SCJ63 mounting subset includes FA front flange, LB foot, and TC centre trunnion with TCM1 bracket (no FB or clevis mounts).
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the difference is due to the single 20 mm rod). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 3118 N. Always design for your specific working pressure.
Yes, provided the mounting, port thread (PT1/4), and magnet option match. The SCJ63 body is slightly longer to house the adjusting screw, so check the 197 mm A(SCJ) dimension against your available space. The stroke adjust range is 30 mm from the nominal 40 mm stroke end.
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