Airtac SCJ40 Standard Cylinder SCJ40X450-100S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X450-100S 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke450 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X450-100S
The SCJ40X450-100S is a 40 mm bore double-acting single-rod cylinder with a field-adjustable stroke end, providing a generous 100 mm of fine-tuning range on its 450 mm nominal stroke. At 0.5 MPa it delivers 628 N push and 528 N pull, making it a capable mid-range actuator for tasks where the end position must be dialled in precisely during commissioning or changeover.
This model includes a built-in magnet (-S suffix), allowing CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing without external brackets. The 16 mm rod, PT1/4 ports, and 21 mm air cushion ensure smooth deceleration, while the 185 mm body length A(SCJ) keeps the package compact relative to its 450 mm working stroke.
Airtac SCJ40 Standard Cylinder SCJ40X450-100S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X450-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 450 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 SCJ40X450-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SCJ40X450-100S Is Used
Commissioning & Setup
The 100 mm adjustment screw lets technicians dial in the exact stop position during machine setup, eliminating the need to fabricate custom hard stops or swap cylinders for different tooling.
Product Changeover
On packaging lines, quickly adjust the stroke end for different box sizes or product formats without mechanical modifications, reducing downtime between production runs.
Wear Compensation
In clamping or pressing applications, the adjustable stroke can be used to take up mechanical wear on tooling or workpieces over time, maintaining consistent contact pressure.
Is the Airtac SCJ40 Standard Cylinder SCJ40X450-100S the Right Cylinder?
Choose the SCJ40 when you need to fine-tune the stroke end without swapping cylinders. If more force is required, the SCJ50 offers 982 N push at 0.5 MPa; for a lighter, more compact solution, the SCJ32 provides 402 N. If your application requires a fixed, non-adjustable stroke, the standard SC series is a simpler, more economical alternative.
For a drop-in replacement, match the 40 mm bore, 450 mm nominal stroke, 100 mm adjust range, PT port thread, and the built-in magnet. At this stroke length, be mindful of side loading on the 16 mm rod—consider an external guide rail or switch to 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 (-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 SCJ40X450-100S FAQ
At 0.5 MPa, the cylinder provides 628 N of pushing force and 528 N of pulling force. The maximum push force at the 0.9 MPa operating limit is 1130 N. The rear adjusting screw does not change the cylinder's force output.
A rear-cap screw sets the stroke end position within a 100 mm range, shortening the 450 mm nominal stroke. It is a mechanical stop for the piston, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod lock or pilot-operated check valve is required for load holding.
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