Airtac SCJ100 Standard Cylinder SCJ100X450-40S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X450-40S 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. Ø100mm bore, 450mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke450 mm
- Stroke adjust-40 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X450-40S
The SCJ100X450-40S is a 100 mm bore, double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides a 40 mm field-adjustable stroke range. This allows you to fine-tune the stroke end position anywhere within that 40 mm window without swapping the cylinder or adding external hard stops. With a 25 mm diameter rod and PT1/2 ports, it delivers a substantial 3927 N of push force at 0.5 MPa, scaling up to 7068 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for reliable end-of-stroke detection. The cylinder body length A is 245 mm, and it uses a standard TPU seal for a wide operating temperature range of -20 to +70 °C. The adjustable air cushion at both ends ensures smooth, controlled deceleration, making it ideal for applications where impact and vibration must be minimized during high-cycle operation.
Airtac SCJ100 Standard Cylinder SCJ100X450-40S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X450-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X450-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×450 | 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 SCJ100 Standard Cylinder SCJ100X450-40S Is Used
Commissioning & Fine-Tuning
The 40 mm adjustment screw allows process engineers to precisely dial in the stroke end position on a new assembly line without fabricating custom mechanical stops, drastically reducing commissioning time.
Product Changeover
On a packaging line, quickly adjust the stroke of a pusher cylinder by up to 40 mm to accommodate a new box size, eliminating the need to stock multiple fixed-stroke cylinders for different formats.
Wear Compensation
In a clamping or pressing operation, the adjustable stroke can be used to take up mechanical wear on tooling or workpieces over time, maintaining consistent clamping force without reprogramming the machine controller.
Is the Airtac SCJ100 Standard Cylinder SCJ100X450-40S the Right Cylinder?
Choose the SCJ100X450-40S when your application requires a powerful push force in the 4000 N class at standard plant pressure and you need to dial in the exact stroke end position during commissioning or changeovers. If your force requirements are lower, stepping down to an SCJ80 bore reduces the push force to 2513 N at 0.5 MPa, which may be sufficient and offers a more compact package. For applications needing a fixed, non-adjustable stroke, the standard SC100 series is a direct alternative with identical mounting and force characteristics.
For a drop-in replacement, match the 100 mm bore, 450 mm nominal stroke, and the 40 mm adjustable range (-40). The port thread must be PT, and the replacement unit must include the magnet option (-S) for sensor compatibility. This cylinder has a nominal stroke of 450 mm, which is well within the 1500 mm maximum standard stroke for the 100 mm bore. However, at this extended stroke length, ensure the rod is guided externally if significant side loads are present to prevent rod bending and premature seal wear.
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 SCJ100 Standard Cylinder SCJ100X450-40S FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force on the retract stroke is 3681 N due to the area of the 25 mm piston rod. At the maximum operating pressure of 0.9 MPa, the push force increases to 7068 N. The rear adjusting screw changes only the stroke end position and has no effect on the cylinder's output force.
A rear-cap screw allows you to shorten the stroke end by up to 40 mm from the nominal 450 mm maximum. This is a mechanical stop adjustment, not a pressure or speed control. You can replace a fixed-stroke SC100 cylinder with this SCJ model if you need the field-adjustability, provided the bore, port size (PT1/2), and magnet option (-S) match your current setup.
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