Airtac SCJ40 Standard Cylinder SCJ40X100-50S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke100 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X100-50S
The SCJ40X100-50S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. With a 40 mm bore and a nominal 100 mm stroke, its rear-cap adjusting screw provides a 50 mm adjustable range, letting you dial in the exact end position without swapping the cylinder. The 16 mm piston rod delivers 628 N of push force at 0.5 MPa, making it a capable actuator for medium-duty positioning tasks.
This model includes a built-in magnet (denoted by the -S suffix), so you can mount CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for precise end-of-stroke detection. The body length A(SCJ) is 185 mm, and it uses a PT1/4 port with an M12x1.25 rod thread. The adjustable air cushion decelerates the piston smoothly over the final 21 mm, protecting your tooling from hard stops.
Airtac SCJ40 Standard Cylinder SCJ40X100-50S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 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 SCJ40X100-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ40X100-50S Is Used
Commissioning & Setup
The 50 mm adjustment range allows technicians to quickly dial in the perfect stroke end position during initial machine setup without needing shims or external hard stops.
Product Changeover
On packaging lines running different box sizes, the adjustable stroke lets operators reset a pusher's end point in seconds, minimizing downtime between formats.
Sensor-Ready Positioning
The built-in magnet allows direct clamping of CMSG/DMSG sensors onto the barrel, providing reliable, non-contact end-of-stroke confirmation to your PLC.
Is the Airtac SCJ40 Standard Cylinder SCJ40X100-50S the Right Cylinder?
Choose the SCJ40X100-50S when your application requires a stroke that can be fine-tuned on the machine during commissioning or changeovers. If you need more force, stepping up to a 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, a standard SC40X100 fixed-stroke cylinder offers the same force and mounting footprint without the adjusting screw. This SCJ model is a direct dimensional replacement for another AirTAC SCJ40 cylinder with a 100 mm nominal stroke, a 50 mm adjust range, PT threads, basic mounting, and a magnet.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ40X100-50S FAQ
At 0.5 MPa, this cylinder generates 628 N pushing force and 528 N pulling force. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1280 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
Yes, if your existing cylinder is an AirTAC SCJ40 with a 100 mm nominal stroke and a 50 mm adjustment range. This model has a PT1/4 port, a built-in magnet, and the basic tie-rod mounting. Ensure your mounting and port thread match before ordering.
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