The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-30S 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. Ø40mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X150-30S is a 40 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 30 mm of field-adjustable stroke reduction. This model delivers 628 N of push force at 0.5 MPa, making it a capable actuator for medium-duty positioning tasks where the end-stop must be fine-tuned during commissioning or format changes.
A built-in magnet (the -S suffix) allows CMSG/DMSG/EMSG solid-state and reed sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The 16 mm diameter piston rod and PT1/4 port keep this cylinder compatible with standard AirTAC SCJ mounting accessories, while the TPU seal ensures reliable operation from -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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.
The 30 mm adjustable stroke allows engineers to precisely dial in the cylinder's end position during machine commissioning without swapping out hard stops or machining custom spacers.
On packaging lines, the SCJ40X150-30S can be quickly re-adjusted to accommodate different product sizes, reducing downtime between production runs for guide rail or stop repositioning.
In clamping or pressing fixtures, the rear screw can be advanced over time to compensate for tooling or pad wear, maintaining consistent clamping force without reprogramming the machine.
For applications needing more force, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. If the stroke length is fixed and never requires field adjustment, the standard SC fixed-stroke cylinder is a simpler, more cost-effective alternative. This SCJ40X150-30S is a direct replacement for any AirTAC SCJ adjustable-stroke cylinder of the same 40 mm bore, 150 mm nominal stroke, 30 mm adjust range, PT port thread, and magnetic piston configuration.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. The maximum push force at 0.9 MPa is 1130 N.
A screw in the rear cap acts as an internal, adjustable end-stop for the piston. It allows you to shorten the stroke by up to 30 mm from the 150 mm nominal maximum, effectively fine-tuning the rod's extended position without changing the cylinder body.
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