The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-30S 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X450-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 30 mm fine-tuning range at the rear cap. With a 63 mm bore, it delivers a substantial 1559 N of push force at 0.5 MPa, making it a robust choice for mid-range industrial automation tasks where the final stop position needs precise, on-machine calibration.
This model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable piston position feedback. The 20 mm diameter piston rod and 28 mm air cushion length contribute to its durable performance, while the tie-rod construction offers a serviceable design. The 450 mm nominal stroke is well within the 1500 mm maximum standard stroke for this bore size.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 450 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. |
| ×450 | 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 commissioning, the 30 mm rear adjusting screw allows engineers to dial in the exact end-stop position for a transfer arm, eliminating the need to fabricate shims or swap out fixed-stroke cylinders.
On a packaging line, operators can quickly adjust the stroke of a pusher cylinder to accommodate a new box size. The SCJ63X450-30S provides the mid-range force needed to move heavier products with a simple screw adjustment.
In clamping or pressing applications, the adjustable stroke can be used to take up mechanical wear in tooling or workpieces over time, maintaining consistent clamp force without reprogramming a servo axis.
Select the SCJ63 when you need a 1559 N push force at standard plant pressure, but must be able to tweak the stroke end by up to 30 mm without changing the cylinder. If your force requirement is lower, stepping down to a 50 mm bore reduces push force to 982 N; for higher demands, an 80 mm bore jumps to 2513 N. This adjustable-stroke model is ideal for commissioning and format changes, whereas a fixed-stroke SC63 is preferred when the stroke is permanently fixed and a simpler, slightly shorter body is acceptable.
For a drop-in replacement, match the 63 mm bore, 450 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet. At this 450 mm stroke length, be mindful of side-loading on the rod. If the application involves significant lateral force, use an external guide rail or consider 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 pull force is lower because the rod reduces the effective piston area on the return stroke.
A rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm, providing on-the-fly fine-tuning. Choose this SCJ model when your application requires precise, field-adjustable end positions for setup, changeovers, or wear take-up. A fixed-stroke SC63 cylinder is a better choice when the stroke length is permanently fixed and you need a simpler, more compact solution.
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