Airtac SCJ40 Standard Cylinder SCJ40X50-30SH
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X50-30SH 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke50 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X50-30SH
The SCJ40X50-30SH is a double-acting, single-rod pneumatic cylinder featuring a 30 mm rear-adjustable stroke, allowing precise end-position tuning without cylinder replacement. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa, making it a robust choice for applications requiring on-the-fly mechanical setup changes.
This model is configured with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and high-temperature Viton (FKM) seals (-H), extending the operating range to 0–150 °C. The PT1/4 port and M12x1.25 rod thread ensure standard connectivity, while the 21 mm air cushion provides smooth deceleration at stroke ends.
Airtac SCJ40 Standard Cylinder SCJ40X50-30SH Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X50-30SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 50 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.
Theoretical Output Force (Ø40mm)
| 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.
Model Code: Airtac SCJ40 Standard Cylinder SCJ40X50-30SH
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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.
Where the Airtac SCJ40 Standard Cylinder SCJ40X50-30SH Is Used
High-Temp Process Tuning
The 30 mm stroke adjustment and Viton seals allow fine-tuning of actuator end-stops in ovens or autoclaves without waiting for cooldown, reducing downtime during process optimization.
Hot Press End-Stop Calibration
Ideal for adjusting the pressing depth on heated platen presses. The 628 N push force at 0.5 MPa provides consistent pressure, while the rear screw compensates for tooling wear over time.
Format Changeover on Packaging Lines
Quickly adapt the stroke end for different box sizes on a packaging machine. The built-in magnet allows sensor-based confirmation of the new adjusted position, ensuring reliable cycle starts.
Is the Airtac SCJ40 Standard Cylinder SCJ40X50-30SH the Right Cylinder?
Select the SCJ40X50-30SH when you need field-adjustable stroke end positioning within a 30 mm window, particularly in hot environments up to 150 °C. If your force requirements are lower, consider stepping down to the 32 mm bore (402 N push at 0.5 MPa); for higher force, the 50 mm bore offers 982 N push. This adjustable-stroke unit is ideal for commissioning and format changes, but if your application requires a fixed, repeatable stroke without adjustment, the standard SC series is a more economical choice.
For a direct replacement, match the 40 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT port thread, and the -S magnet and -H Viton seal options. Always ensure the replacement is an AirTAC SCJ adjustable-stroke cylinder to guarantee dimensional and performance compatibility.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ40 Standard Cylinder SCJ40X50-30SH FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at the 0.9 MPa operating limit is 1130 N. The theoretical force at 1.0 MPa is 128 kgf.
A rear-cap screw allows you to shorten the stroke end by up to 30 mm from the 50 mm nominal maximum. It sets the mechanical stop position. This SCJ model can replace a fixed-stroke SC cylinder if you need field adjustability, provided the bore, port size (PT1/4), and mounting match. The SCJ body is slightly longer than an SC of the same bore to house the adjustment mechanism.
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