Airtac SCJ40 Standard Cylinder SCJ40X450-10S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X450-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke450 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X450-10S
The AirTAC SCJ40X450-10S is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides a 10 mm field-adjustable stroke range. With a 40 mm bore, it delivers 628 N of push force at 0.5 MPa, making it a practical actuator for mid-range linear tasks where the end position needs fine-tuning during commissioning or after mechanical wear.
This model features a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable end-of-stroke detection. The 16 mm diameter piston rod and PT1/4 port ensure a solid connection, while the 21 mm air cushion decelerates the piston smoothly at both ends of its 450 mm nominal stroke.
Airtac SCJ40 Standard Cylinder SCJ40X450-10S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X450-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 10 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 SCJ40X450-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×450 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ40X450-10S Is Used
Commissioning Fine-Tuning
The 10 mm rear screw adjustment lets technicians dial in the exact push-stroke endpoint on a new assembly line without swapping cylinders or machining external hard stops.
Wear Compensation
In high-cycle clamping fixtures, the adjustable stroke can be extended slightly over time to compensate for pad or workpiece wear, maintaining consistent clamping force without reprogramming.
Product Format Changeover
Quickly adapt a diverter gate's throw distance for different box sizes on a packaging conveyor by adjusting the cylinder's stroke end, minimizing downtime between production runs.
Is the Airtac SCJ40 Standard Cylinder SCJ40X450-10S the Right Cylinder?
Choose the SCJ40 when you need a 40 mm bore cylinder with a push force of 628 N at 0.5 MPa and the ability to trim the stroke end by up to 10 mm. If your application demands more force, stepping up to the SCJ50 provides 982 N of push force at the same pressure. For applications that do not require stroke adjustment, the fixed-stroke SC40X450 is a more cost-effective alternative. This cylinder is a direct replacement for another AirTAC SCJ40X450-10S with a PT port, basic mount, and magnet.
With a 450 mm stroke, the piston rod is fully extended, which can create a significant side-load moment. To prevent rod bending and premature seal wear, always guide the load externally with a linear rail or use a guided cylinder if the load is not perfectly axial.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ40X450-10S FAQ
At the maximum operating pressure of 1.0 MPa (10 bar), the theoretical push force is 1130 N. The maximum practical force at the standard 0.9 MPa is 1017 N. The pull force is lower due to the rod area, at 528 N at 0.5 MPa.
Yes, this is a genuine AirTAC SCJ40X450-10S with a PT port, basic mount, and magnet. It is a direct dimensional and functional replacement for any cylinder with the same model code, ensuring identical mounting, port locations, and sensor compatibility.
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