Airtac SCJ40 Standard Cylinder SCJ40X225-10S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X225-10S 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke225 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X225-10S
The SCJ40X225-10S 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 and 16 mm rod, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it a capable mid-size actuator for applications where the stroke end position needs fine-tuning during commissioning or changeover.
This model includes a built-in magnet (-S suffix), allowing easy mounting of CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for precise end-of-stroke detection. The body length A(SCJ) is 185 mm, and it features an adjustable air cushion of 21 mm to decelerate the piston smoothly. Operating on filtered air from 0.15 to 1.0 MPa, it is a robust solution for dynamic industrial tasks.
Airtac SCJ40 Standard Cylinder SCJ40X225-10S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X225-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 225 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 SCJ40X225-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SCJ40X225-10S Is Used
Commissioning Fine-Tuning
The 10 mm rear screw adjustment lets technicians dial in the exact stroke end position on a new machine without modifying hard stops or reprogramming, speeding up the final setup phase.
Format Changeover on Packaging Lines
Quickly adjust the push-off or gating stroke when switching between product sizes on a packaging conveyor, reducing downtime with a simple manual turn of the rear screw.
Wear Compensation in Clamping
In a repetitive clamping fixture, the adjustable stroke can be shortened over time to compensate for pad wear, maintaining consistent clamping force without replacing the cylinder.
Is the Airtac SCJ40 Standard Cylinder SCJ40X225-10S the Right Cylinder?
For a step up in force, the SCJ50 bore provides 982 N of push force at 0.5 MPa, while a step down to the SCJ32 offers 402 N. If your application does not require stroke adjustment, a fixed-stroke SC40 cylinder is a simpler, more cost-effective alternative. This SCJ40X225-10S is a direct replacement for any AirTAC SCJ40 cylinder with a 225 mm nominal stroke, a 10 mm adjust range, PT ports, and a built-in magnet; ensure the mounting style matches your existing setup. For strokes of this length, be mindful of side loads on the rod; an external linear guide or a guided cylinder is recommended 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 SCJ40X225-10S FAQ
At the standard operating pressure of 0.5 MPa, this cylinder produces 628 N of push force and 528 N of pull force. The maximum push force at 0.9 MPa is 1130 N. The adjusting screw changes only the stroke end position, not the cylinder's force output.
Yes, the SCJ40X225-10S can replace a fixed-stroke SC40 if you need the ability to fine-tune the stroke end by up to 10 mm. The mounting dimensions, port size (PT1/4), and rod thread (M12x1.25) are identical to the SC series, but the overall body length is slightly longer to accommodate the adjusting mechanism.
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