Airtac SCJ40 Standard Cylinder SCJ40X225-40S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X225-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 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-40 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X225-40S
The SCJ40X225-40S is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw, allowing you to fine-tune the stroke end position by up to 40 mm without removing the unit. With a 40 mm bore and a 16 mm piston rod, it delivers 628 N of push force at 0.5 MPa, making it a compact yet robust actuator for mid-range automation tasks.
This model includes a built-in magnet (-S suffix), so CMSG/DMSG/EMSG reed or solid-state sensors can be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The adjustable air cushion decelerates the piston smoothly, and the PT1/4 ports ensure straightforward pneumatic connections.
Airtac SCJ40 Standard Cylinder SCJ40X225-40S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X225-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 40 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 SCJ40X225-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ40X225-40S Is Used
Commissioning & Setup
Adjust the stroke end precisely during machine commissioning to dial in the perfect stopping position for grippers or pushers without needing to swap cylinders or fabricate external hard stops.
Product Changeover
Quickly adapt the cylinder's end position for different product sizes on a packaging or sorting line by turning the rear screw, minimizing downtime between batch runs.
Wear Compensation
Take up mechanical play or compensate for seal wear over time by slightly extending the effective stroke, maintaining consistent clamping or pressing force without replacing the actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X225-40S the Right Cylinder?
Choose the SCJ40 when you need field-adjustable stroke control in a 40 mm bore package. If 628 N of push force at 0.5 MPa is insufficient, stepping up to the SCJ50 provides 982 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series offers a simpler, more cost-effective alternative. This SCJ40X225-40S is a direct replacement for any AirTAC SCJ40 with a 225 mm nominal stroke, a 40 mm adjustment range, PT ports, a basic mount, and a magnet sensor option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ40X225-40S FAQ
At 0.5 MPa, the cylinder delivers 628 N of push force and 528 N of pull force. The maximum push force at the 1.0 MPa operating limit is 1130 N.
You can, but you will lose the adjustable stroke feature. The SCJ40X225-40S has a rear screw that provides up to 40 mm of stroke-end adjustment. A standard SC40 has a fixed stroke and cannot be adjusted in the field.
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