Airtac SCJ100 Standard Cylinder SCJ100X400-50
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X400-50 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. Ø100mm bore, 400mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke400 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X400-50
The SCJ100X400-50 is a 100 mm bore, double-acting, single-rod pneumatic cylinder from the AirTAC SCJ tie-rod series, delivering a substantial 3927 N of push force at 0.5 MPa. Its defining feature is the rear-cap adjusting screw, which provides up to 50 mm of field-adjustable stroke-end reduction, allowing you to dial in the exact stopping position for a 400 mm nominal stroke without changing the cylinder or adding external hard stops.
This model uses a 25 mm diameter piston rod with an M20x1.5 male thread and PT1/2 port connections. The body length A(SCJ) is 245 mm, and it includes a 29 mm air cushion for smooth deceleration. With a maximum operating pressure of 1.0 MPa, it can generate up to 7068 N of push force, making it a powerful choice for heavy-duty positioning tasks that require on-machine fine-tuning.
Airtac SCJ100 Standard Cylinder SCJ100X400-50 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X400-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 50 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 SCJ100X400-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SCJ100 Standard Cylinder SCJ100X400-50 Is Used
Format Changeover on Packaging Machines
Quickly adjust the end-stop for different box or carton sizes without mechanical modifications. The 50 mm range handles multiple SKU formats on a single machine, reducing downtime between production runs.
Clamping with Variable Part Thickness
Fine-tune the clamp stroke end to accommodate slight variations in workpiece thickness in welding or assembly fixtures. The 3927 N push force at 0.5 MPa provides a secure hold without crushing delicate parts.
Heavy-Duty Diverter Gate Positioning
Set the precise open and closed positions of a diverter gate on a conveyor line. The rear screw allows operators to compensate for wear on the gate stop over time, maintaining accurate alignment.
Is the Airtac SCJ100 Standard Cylinder SCJ100X400-50 the Right Cylinder?
Choose the SCJ100X400-50 when your application demands high force and the ability to precisely set the stroke end during commissioning or changeovers. If you need even more force, stepping up to the 125 mm bore provides 6136 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC100X400 fixed-stroke cylinder is a simpler, more cost-effective alternative. For this 400 mm stroke, be mindful of side loads; if the rod is not guided externally, consider adding a guide rod assembly or switching to a guided cylinder to prevent rod bending and premature seal wear. A direct replacement must match the 100 mm bore, 400 mm nominal stroke, 50 mm adjustable range, and PT port thread.
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 SCJ100 Standard Cylinder SCJ100X400-50 FAQ
At the standard 0.5 MPa operating pressure, it produces 3927 N of push force and 3681 N of pull force (the pull force is lower due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the push force increases to 7068 N.
It is a direct replacement for another AirTAC SCJ100X400-50 adjustable-stroke cylinder. To replace a different brand, you must match the 100 mm bore, 400 mm nominal stroke, 50 mm adjustment range, PT1/2 ports, and basic mounting. The rear adjusting screw design means the overall body length is specific to the SCJ series.
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