The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-30S 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X350-30S provides a nominal 350 mm stroke with a 30 mm rear-end adjustment range, letting you fine-tune the end position on the fly. This 63 mm bore double-acting cylinder delivers 1559 N of push force at 0.5 MPa, driven by a 20 mm piston rod.
A built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke detection, while the 28 mm air cushion decelerates the piston smoothly. The tie-rod body measures 197 mm in length, making it a compact choice for applications needing frequent stroke changes.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X350-30S |
|---|---|
| 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.
Quickly adjust the stroke end to accommodate different product sizes on a packaging line without swapping the cylinder or adding hard stops.
Fine-tune the final clamping position on a welding fixture to account for part tolerance variations, ensuring consistent pressure.
During machine setup, dial in the exact actuator travel needed for a new process, then lock the adjusting screw for repeatable production.
Choose the SCJ63 when you need field-adjustable stroke in the 63 mm bore class. If your force requirement drops, the 50 mm bore SCJ50 offers 982 N push at 0.5 MPa; for higher force, step up to the 80 mm bore SCJ80 which provides 2513 N. For a direct replacement, match the 63 mm bore, 350 mm nominal stroke, 30 mm adjust range, PT port, and the -S magnet option. At this 350 mm stroke, ensure the rod is guided externally if significant side loads are present to prevent bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this single-rod cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 0.9 MPa, push force increases to 2805 N.
The rear adjusting screw shortens the stroke end by up to 30 mm from the 350 mm nominal maximum. It is a direct adjustable replacement for an SC of the same bore and stroke class, provided the mounting, port thread, and magnet option match.
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