Airtac SEJ Adjustable Cylinder SEJ100AX300-100S
The AirTAC SEJ Adjustable Cylinder SEJ100AX300-100S 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 100mm window, so this Ø100mm unit covers an effective stroke of 200–300mm without changing cylinders. Force is equal in both directions.
- BoreØ100 mm
- Nominal stroke300 mm
- Adjust window100 mm
- Effective stroke200–300 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 SEJ100AX300-100S
The AirTAC SEJ100AX300-100S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 100 mm adjustable stroke window, yielding an effective stroke range of 200 to 300 mm. A stop screw on the back rod lets you dial in the exact retract end position during machine commissioning without swapping hardware. The SUS420J2 stainless steel rod suits corrosion-resistant and washdown environments.
Because a rod exits both ends, the annulus area is symmetrical, delivering equal force in both directions at 3681 N (0.5 MPa) and 5153 N (0.7 MPa). The extruded aluminum barrel has no external tie rods, and field-adjustable air cushions at both ends decelerate the 25 mm rod near stroke ends. The built-in magnet supports CMSE reed and DMSE electronic sensors for position feedback.
Airtac SEJ Adjustable Cylinder SEJ100AX300-100S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ100AX300-100S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 mm |
| Adjustment window | 100 mm (200–300 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 100mm 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 SEJ100AX300-100S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -100 | 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 SEJ100AX300-100S Is Used
Press Die Clearance
Dial in the 200-300 mm retract window to set precise die clearance during stamping press changeovers, utilizing the 5153 N both-way force to extract heavy parts.
Washdown Diverter
Leverage the SUS420J2 stainless rod in food processing diverter gates, adjusting the 100 mm stroke window on the machine to match varying pipe diameters.
Pallet Stop Tuning
Fine-tune the end stop position on packaging conveyor lines during commissioning, using the equal both-way force to halt 100 mm pallet loads precisely.
Is the Airtac SEJ Adjustable Cylinder SEJ100AX300-100S the Right Cylinder?
Verify the 100 mm adjustment window covers your required retract position within the 200-300 mm effective range. If your application needs less push force, stepping down to a bore 80 cylinder provides 2268 N at 0.5 MPa; if you need more power, a bore 125 cylinder yields 5734 N at 0.5 MPa. If exact end-position tuning is unnecessary, a fixed-stroke SED double-rod cylinder offers a simpler setup.
For a 300 mm stroke, external guides are recommended to prevent side-loading on the 25 mm rod. Note that the adjustable cushion and stop screw decelerate the load but do not hold position on air loss; a BSED or external rod lock is required for fail-safe holding. This PT1/2 ported cylinder mounts via Basic, FA, LB, TC, FTC, TCM1, or TCM2 hardware.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (100mm) 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 100mm 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 SEJ100AX300-100S FAQ
A stop screw on the back rod mechanically shortens the retract stroke over a 100 mm window. You can dial the effective stroke anywhere from 200 mm up to the nominal 300 mm, then lock the screw 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.
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