Airtac SCJ40 Standard Cylinder SCJ40X225-100
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X225-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 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-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X225-100
The SCJ40X225-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 628 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, allowing machine builders to fine-tune the 225 mm nominal stroke on the fly without swapping the cylinder or adding external hard stops. The 16 mm diameter piston rod and PT1/4 ports are standard for this 40 mm bore class, and the integrated air cushion (21 mm length) decelerates the piston smoothly at end-of-travel.
This cylinder is a genuine AirTAC SCJ series unit, built with a tie-rod construction and a TPU seal as standard, suiting operating temperatures from -20 to +70 °C. The body length A(SCJ) is 185 mm, making it a compact solution for applications where space is at a premium but stroke flexibility is required. With an operating pressure range of 0.15–1.0 MPa and a proof pressure of 1.5 MPa, it handles demanding industrial automation tasks reliably.
Airtac SCJ40 Standard Cylinder SCJ40X225-100 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X225-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 100 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 SCJ40X225-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ40X225-100 Is Used
Commissioning & Setup
The 100 mm adjustment range lets technicians dial in the exact stroke end position during initial machine setup without needing to swap out cylinders or machine custom stops, speeding up factory acceptance testing.
Product Changeover
On packaging lines handling different box sizes, the stroke can be quickly shortened from the nominal 225 mm to match a new product format, minimizing downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the screw can be advanced over time to take up mechanical wear in tooling or seals, maintaining consistent contact without reprogramming the PLC.
Is the Airtac SCJ40 Standard Cylinder SCJ40X225-100 the Right Cylinder?
Choose the SCJ40X225-100 when your process requires frequent stroke-end adjustments within a 100 mm window, such as for commissioning trials or format changeovers. If you need more force, step up to the 50 mm bore SCJ50 series, which provides 982 N of push force at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC series is a more economical choice. This model is a direct replacement for another AirTAC SCJ40 adjustable-stroke cylinder with a 225 mm nominal stroke, 100 mm adjust range, PT ports, and basic mounting. For strokes over 300 mm, consider an external guide rail to prevent rod bending from side loads.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ40X225-100 FAQ
The push force is 628 N at 0.5 MPa and 1130 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single rod's area differential, providing 528 N at 0.5 MPa. The maximum theoretical force at 1.0 MPa is 128 kgf.
You can, but only if you need the adjustable stroke feature. The SCJ40X225-100 has a longer body to house the adjusting screw. Ensure you match the port thread (PT), mounting style, and magnet option. If you do not need adjustability, the standard SC series is a direct dimensional match for a fixed-stroke application.
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