Airtac SEJ Adjustable Cylinder SEJ50BX130-75S
The AirTAC SEJ Adjustable Cylinder SEJ50BX130-75S 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 75mm window, so this Ø50mm unit covers an effective stroke of 55–130mm without changing cylinders. Force is equal in both directions.
- BoreØ50 mm
- Nominal stroke130 mm
- Adjust window75 mm
- Effective stroke55–130 mm
- Port sizePT1/4
- CushionAdjustable, 30 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 SEJ50BX130-75S
The AirTAC SEJ50BX130-75S is a double-acting, double-rod ISO 15552 profile cylinder featuring a SUS304 stainless steel rod for washdown durability. A rod exits both ends, yielding identical annulus areas so output force is exactly equal in both directions at 825 N each way at 0.5 MPa. The retract stroke is mechanically adjustable via a back-rod stop screw over a 75 mm window, giving an effective stroke range of 55 to 130 mm.
It includes a magnet for CMSE or DMSE sensors and field-adjustable air cushions at both ends. The PT1/4 port and M16x1.5 rod-end thread match the 50 mm bore. Note that the stop screw sets the mechanical end position; it does not hold the load on air loss.
Airtac SEJ Adjustable Cylinder SEJ50BX130-75S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ50BX130-75S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 130 mm |
| Adjustment window | 75 mm (55–130 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
|---|---|
| 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, 30 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 75mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa | 1155 N |
| Max (@1.0 MPa) | 168 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 SEJ50BX130-75S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 50 | Bore size in mm. |
| ×130 | Nominal stroke length in mm. |
| -75 | 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 SEJ50BX130-75S Is Used
Fill Valve Dial-In
Fine-tune the retract stop during commissioning on a beverage fill valve, using the 75 mm window to match the exact nozzle height while applying 825 N of equal both-way force.
Packaging Changeover
Adjust the mechanical end position on a packaging machine when switching to different carton heights, relying on the SUS304 rod for washdown corrosion resistance.
Is the Airtac SEJ Adjustable Cylinder SEJ50BX130-75S the Right Cylinder?
Confirm the 75 mm adjustment window covers your required end-position range (55 to 130 mm). If you need less fine-tuning range, a fixed-stroke SED might be enough. For sizing, the next bore down (40 mm) yields 528 N each way at 0.5 MPa, while stepping up to a 63 mm bore provides 1402 N. Use this 50 mm bore for 825 N loads. The plain cylinder does not hold position on air loss; use an external rod lock for fail-safe holding. For this 130 mm stroke, external guides help manage side loads. To replace an ISO 15552 unit, match the bore, effective stroke, PT port, and mounting (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (75mm) 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 75mm 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 SEJ50BX130-75S FAQ
The retract stroke is adjustable over a 75 mm window via a stop screw on the back rod. The effective stroke ranges from 55 mm up to the nominal 130 mm. Lock the screw after setting your exact end position.
Because it is a double-rod cylinder, the force is identical in both directions: 825 N at 0.5 MPa and 1154 N at 0.7 MPa. The maximum force is 168 kgf at 1.0 MPa.
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