Airtac SCJ100 Standard Cylinder SCJ100X400-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X400-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 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-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X400-20S
The SCJ100X400-20S is a 100 mm bore, double-acting single-rod cylinder with a field-adjustable stroke end. Its rear-cap adjusting screw provides up to 20 mm of retraction from the nominal 400 mm maximum stroke, letting you fine-tune the end position during commissioning or changeovers without swapping the cylinder. At 0.5 MPa it delivers 3927 N of push force and 3681 N on the pull stroke, driven by a 25 mm diameter piston rod.
This model includes a built-in magnet (suffix -S), so CMSG/DMSG/EMSG solid-state or reed sensors can be clamped directly onto the tie-rod barrel for non-contact position sensing. The body length A dimension is 245 mm, and it uses PT1/2 ports with an M20x1.5 rod thread. The adjustable air cushion decelerates the piston smoothly, and the entire unit is rated for 0.15–1.0 MPa operating pressure.
Airtac SCJ100 Standard Cylinder SCJ100X400-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X400-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 20 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 SCJ100X400-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X400-20S Is Used
Format Changeover Tuning
The 20 mm adjust range lets operators quickly dial in a new end stop for different product sizes on packaging or filling lines, reducing downtime between batches.
Press-Fit Depth Control
Fine-tune the insertion depth of a pressing or staking operation on the fly to compensate for part tolerance stack-up, ensuring consistent assembly quality.
Wear Compensation
As tooling or gripper pads wear over thousands of cycles, the stroke-end screw can be advanced slightly to restore the original contact position without replacing the cylinder.
Is the Airtac SCJ100 Standard Cylinder SCJ100X400-20S the Right Cylinder?
Choose the SCJ100X400-20S when you need a half-tonne push force class and on-machine stroke tweaking. Step up to the 125 mm bore (6136 N push at 0.5 MPa) if the load is heavier; step down to 80 mm (2513 N push) to save space and air. For a fixed end position, a standard SC100X400 cylinder removes the adjuster but keeps the same mounting envelope.
With a 400 mm stroke, side-loading and rod buckling become important considerations. If the load is not guided externally, pair this cylinder with a linear guide or consider a guided cylinder to protect the rod and bearing. Replacement must match the 100 mm bore, 400 mm nominal stroke, 20 mm adjust range, PT1/2 ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X400-20S FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 7854 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the adjustable stroke feature. The SCJ100X400-20S shares the same bore, port size (PT1/2), and basic mounting dimensions as the SC100 series. Ensure the 20 mm adjustment range is sufficient for your application and that you account for the slightly longer overall body length of the SCJ design.
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