Airtac SCJ100 Standard Cylinder SCJ100X50-40SN
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X50-40SN 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, 50mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke50 mm
- Stroke adjust-40 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X50-40SN
The SCJ100X50-40SN is a double-acting, single-rod pneumatic cylinder from AirTAC, engineered with a rear-cap adjusting screw that provides a 40 mm field-adjustable stroke-end range. This allows machine builders to fine-tune the piston stop position without swapping the cylinder, making it ideal for commissioning trials or format changeovers. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa.
This model features a 25 mm diameter piston rod, PT1/2 port threads, and an M20x1.5 rod-end thread for secure tooling attachment. The suffix 'S' indicates a built-in magnet, enabling direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke detection, while the 'N' suffix specifies NBR (nitrile) seals, suitable for standard operating temperatures from -20 to +70 °C. The body length A for this SCJ series is 245 mm.
Airtac SCJ100 Standard Cylinder SCJ100X50-40SN Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X50-40SN |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 50 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 SCJ100X50-40SN
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SCJ100X50-40SN Is Used
Commissioning & Setup
During machine commissioning, the 40 mm adjustment screw allows engineers to iteratively dial in the perfect stroke end position for a 100 mm bore actuator, compensating for assembly tolerances without needing to machine custom stops.
Product Changeover
On packaging or sorting lines, the adjustable stroke enables a quick mechanical changeover between different product sizes. The operator can adjust the cylinder's end stop by up to 40 mm to handle a new box format, minimizing downtime.
Wear Compensation
In high-cycle clamping or pressing applications, the tooling or workpiece contact point can wear over time. The SCJ's rear screw provides a simple way to take up this wear, restoring the precise clamping position without replacing the entire cylinder.
Is the Airtac SCJ100 Standard Cylinder SCJ100X50-40SN the Right Cylinder?
Select the SCJ100X50-40SN when you need a robust 100 mm bore cylinder with the ability to precisely dial in the stroke end position, eliminating the need for external hard stops. If your application requires slightly less force, stepping down to the 80 mm bore (2513 N push at 0.5 MPa) can reduce air consumption and physical size. Conversely, for significantly higher force demands, the 125 mm bore model provides 6136 N of push at the same pressure. This adjustable-stroke unit is the correct choice over a fixed-stroke SC when the final stroke length is not yet finalized or needs periodic adjustment.
For a direct replacement, match the 100 mm bore, 50 mm nominal stroke, and the 40 mm adjustment range (-40). Ensure the replacement unit has the same PT port threads, the built-in magnet (-S), and NBR seal material (-N). As this is a basic mount model, it is supplied without a mounting bracket; you will need to order the appropriate SCJ accessory, such as an FA front flange (F-SC100FA) or LB foot mount (F-SC100LB), separately.
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 SCJ100X50-40SN 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 1.0 MPa, the push force reaches 7068 N. Always apply a safety factor for real-world dynamic loads.
Yes, the SCJ100X50-40SN can replace an SC100X50 if you need the added benefit of a field-adjustable stroke end. It has the same 100 mm bore, 50 mm maximum stroke, and single-rod design. Ensure your mounting and port connections (PT1/2) match, and note that the SCJ body is slightly longer to accommodate the adjusting mechanism.
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