Airtac SEJ Adjustable Cylinder SEJ100BX300-10
The AirTAC SEJ Adjustable Cylinder SEJ100BX300-10 is a genuine double-acting ISO 15552 double-rod cylinder with a mechanically ADJUSTABLE stroke: a back-rod stop screw lets you fine-tune the retract end over a 10mm window, so this Ø100mm unit covers an effective stroke of 290–300mm without changing cylinders. Force is equal in both directions.
- BoreØ100 mm
- Nominal stroke300 mm
- Adjust window10 mm
- Effective stroke290–300 mm
- Port sizePT1/2
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SEJ Adjustable Cylinder SEJ100BX300-10
The AirTAC SEJ100BX300-10 is a double-acting, double-rod ISO 15552 profile cylinder featuring a SUS304 stainless steel rod for corrosion resistance. A rod exits both ends, ensuring identical annulus areas and equal force in both directions, yielding 3681 N each way at 0.5 MPa. The retract stroke is mechanically adjustable via a back-rod stop screw over a 10 mm window, providing an effective stroke range of 290-300 mm for precision machine commissioning.
This 100 mm bore pneumatic actuator operates at 30-800 mm/s with a PT1/2 port and a Ø25 mm rod. It includes field-adjustable air cushions at both ends to decelerate the load near the stroke terminus. Note that this SKU lacks a magnet, so it will not directly support CMSE or DMSE position sensors without modification.
Airtac SEJ Adjustable Cylinder SEJ100BX300-10 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ100BX300-10 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 mm |
| Adjustment window | 10 mm (290–300 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C (0–150 °C with FKM seals) |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
Specifications follow the official AirTAC SEJ datasheet and ISO 15552 / VDMA 24562 dimensions. The adjustment screw shortens the retract end only; do not exceed the 10mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø100mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 3682 N |
| 0.7 MPa | 5154 N |
| Max (@1.0 MPa) | 751 kgf |
A rod exits both ends, so extend and retract force are identical. Actual usable force is lower than theoretical; size with a safety margin.
Model Code: Airtac SEJ Adjustable Cylinder SEJ100BX300-10
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -10 | Adjustment stroke window in mm (options: 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting (SEJ): Basic, LB, FA, TC, FTC, TCM1, TCM2. Related: SED (double rod, fixed stroke), SE (single rod).
Where the Airtac SEJ Adjustable Cylinder SEJ100BX300-10 Is Used
Filler Valve Tuning
Dial in the exact 290-300 mm retract stop on a beverage filling line to set precise liquid valve closure heights, leveraging the 3681 N both-way force and SUS304 rod for washdown environments.
Press Brake Stop
Fine-tune the material back-gauge position on a metal press brake, using the 10 mm adjustment window to match diverse flange lengths while delivering 5153 N of clamping force at 0.7 MPa.
Packaging Changeover
Adjust the mechanical end position during packaging line product changeovers to accommodate different carton sizes, using the equal push and pull forces to maintain stable actuation.
Is the Airtac SEJ Adjustable Cylinder SEJ100BX300-10 the Right Cylinder?
Verify the 10 mm adjustment window covers your end-position tuning range, yielding an effective 290-300 mm stroke. If your application requires less force, stepping down to the 80 mm bore provides 2268 N at 0.5 MPa, while stepping up to the 125 mm bore yields 5734 N. If the stroke never varies after commissioning, a fixed-stroke SED offers a simpler solution. Because the stroke is 300 mm, external guide rails should support the load to prevent rod side-loading and premature seal wear. This cylinder is dimensionally interchangeable per ISO 15552; confirm your mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2) and port form. The air cushion decelerates the load but does not hold position on air loss; for fail-safe holding, specify an external rod lock.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (10mm) covers your range
- ✓ Equal force both directions OK
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE 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 stop screw within the 10mm window; lock it after adjusting.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB/FA/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SEJ Adjustable Cylinder SEJ100BX300-10 FAQ
A stop screw on the rear rod mechanically limits the retract stroke. For this model, you can dial the end position within a 10 mm window, creating an effective stroke range of 290 to 300 mm. You set the exact position on the machine and lock it in place.
Because it is a double-rod cylinder, force is equal in both directions: 3681 N at 0.5 MPa, 5153 N at 0.7 MPa, and a maximum of 751 kgf at 1.0 MPa. The adjustable air cushion only decelerates the load near stroke end; it is not a brake, so the cylinder will not hold position on air loss without an external rod lock.
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