Airtac SCJ100 Standard Cylinder SCJ100X30-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X30-20 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, 30mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke30 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X30-20
The SCJ100X30-20 is a 100 mm bore double-acting single-rod cylinder with a rear adjusting screw that lets you fine-tune the stroke end by up to 20 mm. At 0.5 MPa it delivers 3927 N push and 3681 N pull, making it a heavy-force actuator for pressing, clamping, and positioning tasks where the final stop position must be dialled in on the machine.
This model uses a 25 mm diameter piston rod, PT1/2 ports, and an M20x1.5 rod thread. The adjustable cushion decelerates the piston over the last 29 mm of travel, and the tie-rod body length A(SCJ) is 245 mm. The standard PT threads and TPU seals suit filtered-air systems from -20 to +70 °C.
Airtac SCJ100 Standard Cylinder SCJ100X30-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X30-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 30 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 SCJ100X30-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×30 | 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 SCJ100X30-20 Is Used
Commissioning Fine-Tuning
During machine bring-up, the 20 mm screw adjustment lets technicians set the exact end-stop for a 100 mm bore press tool without re-machining stops or swapping cylinders.
Wear Take-Up on Clamps
On a high-cycle clamping station, the adjustable stroke compensates for pad wear over time, maintaining consistent clamping force without reprogramming the PLC.
Format Changeover
When a packaging line switches product sizes, the SCJ100X30-20’s screw adjuster quickly resets the pusher stroke end to match the new box depth, reducing downtime.
Is the Airtac SCJ100 Standard Cylinder SCJ100X30-20 the Right Cylinder?
Choose this 100 mm bore when the 80 mm bore’s 2513 N push at 0.5 MPa is marginal and you need the next force class up without increasing pressure. If the stroke never needs field adjustment, the fixed-stroke SC100 is a simpler alternative; for guided linear motion with side loads, consider a guided cylinder instead.
Direct replacement matches another AirTAC SCJ of identical 100 mm bore, 30 mm nominal stroke, and 20 mm adjust range with PT ports. For strokes of 300 mm or more, verify rod buckling and side-load limits — an external guide rail or guided cylinder may be required to protect the rod and bearing.
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 SCJ100X30-20 FAQ
At the standard 0.5 MPa operating pressure, push force is 3927 N and pull force is 3681 N (the difference is due to the single 25 mm rod). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 7854 N.
The rear-cap adjusting screw sets the stroke end position within a 20 mm range — it shortens the nominal 30 mm stroke. It does not lock or hold the piston; if air pressure is lost or the valve is centred, the rod can drift. For load holding without live air, add an external rod lock or pilot-operated check valve.
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