Airtac SEJ Adjustable Cylinder SEJ50BX75-10S
The AirTAC SEJ Adjustable Cylinder SEJ50BX75-10S 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 Ø50mm unit covers an effective stroke of 65–75mm without changing cylinders. Force is equal in both directions.
- BoreØ50 mm
- Nominal stroke75 mm
- Adjust window10 mm
- Effective stroke65–75 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 SEJ50BX75-10S
The AirTAC SEJ50BX75-10S 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 the annulus area remains identical for equal force and speed in both directions.
This unit dials in a 10 mm retract adjustment window, yielding an effective stroke range of 65 to 75 mm. You set the exact end position mechanically via a stop screw on the back rod, then lock it down. The extruded aluminum barrel has no external tie rods, and the integrated -S magnet pairs directly with CMSE reed or DMSE electronic sensors.
Airtac SEJ Adjustable Cylinder SEJ50BX75-10S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ50BX75-10S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 10 mm (65–75 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 10mm 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 SEJ50BX75-10S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 50 | Bore size in mm. |
| ×75 | 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 SEJ50BX75-10S Is Used
Variable-Height Product Changeover
Adjust the 65 to 75 mm effective stroke on the fly to accommodate different bottle heights on a washdown filler, using the equal both-way force to raise and lower platforms smoothly.
Sensor Flag Commissioning
Use the rear exiting rod to carry a cam for DMSE electronic sensors, micro-adjusting the stop screw during machine commissioning to find the exact 1154 N retract endpoint.
Is the Airtac SEJ Adjustable Cylinder SEJ50BX75-10S the Right Cylinder?
Verify this 10 mm window covers your positioning range. If you need less force, the adjacent 40 mm bore delivers 528 N both ways at 0.5 MPa; stepping up to the 63 mm bore yields 1402 N. If your machine never requires end-position changes, a fixed-stroke SED saves complexity. For direct ISO 15552 replacement, match the 75 mm stroke, PT1/4 port, and your mounting choice from Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Remember that a plain SEJ does not hold position on air loss. The adjustable air cushion at both ends only decelerates the load near stroke end; it is not a mechanical lock. For fail-safe holding, specify a BSED or 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 SEJ50BX75-10S FAQ
A stop screw on the rear rod lets you dial the retract end position over a 10 mm window. The effective stroke ranges from 65 mm up to the nominal 75 mm. You set the exact end point mechanically and lock it in place.
Because it is a double-rod cylinder, force is identical in both directions. It provides 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and a maximum of 168 kgf at 1.0 MPa.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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