The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-30 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X350-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stopping position by up to 30 mm without swapping the unit. Its 63 mm bore delivers 1559 N of push force at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, making it a strong mid-range actuator for positioning tasks.
This model uses a 20 mm diameter piston rod, PT1/4 ports, and an M16x1.5 rod thread for standard clevis or rod-eye attachments. The adjustable air cushion is 28 mm long, and the tie-rod body length (A dimension) measures 197 mm. It is a genuine AirTAC SCJ cylinder built for repeatable, on-machine stroke adjustments during commissioning or format changes.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 350 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. |
| ×350 | 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 adjusting screw allows engineers to precisely dial in the stroke end for a perfect part fit or sensor alignment without needing to re-plumb or swap the cylinder.
On a packaging line, the adjustable stroke lets operators quickly reset a pusher or diverter's stopping position when switching between different box sizes, reducing downtime between batches.
In high-cycle clamping or pressing fixtures, the stroke end can be extended slightly over time to compensate for pad wear or material compression, maintaining consistent clamping force without replacing tooling.
Choose the SCJ63 when you need the stroke-end adjustability of the SCJ series with the force of a 63 mm bore. If your load requires less force, stepping down to a 40 mm bore SCJ reduces push force to 628 N at 0.5 MPa; for a significant force increase, the 80 mm bore SCJ provides 2513 N at the same pressure. For this 350 mm stroke, be mindful of side-loading on the extended rod—an external guide rail or switching to a guided cylinder is recommended if the load is not perfectly axial. A fixed-stroke SC63X350 is the direct alternative if the adjustable feature is not needed. This SCJ63X350-30 is a direct dimensional replacement for another AirTAC SCJ63 with a 350 mm nominal stroke, 30 mm adjust range, PT threads, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The pull force is lower because the 20 mm piston rod reduces the effective piston area on the return stroke.
The rear-cap adjusting screw physically limits how far the piston can extend, shortening the stroke end by up to 30 mm. It sets the stopping position, not the speed. Speed is controlled separately by flow control valves in the air circuit.
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