Airtac SEJ Adjustable Cylinder SEJ63X75-30S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X75-30S 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 30mm window, so this Ø63mm unit covers an effective stroke of 45–75mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke75 mm
- Adjust window30 mm
- Effective stroke45–75 mm
- Port sizePT3/8
- 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 SEJ63X75-30S
The AirTAC SEJ63X75-30S is a double-acting, double-rod ISO 15552 profile cylinder with a 30 mm adjustable stroke window. A rod exits both ends, yielding identical annulus areas so output force is perfectly balanced at 1402 N each way at 0.5 MPa. You can dial the retract end from 45 mm up to the nominal 75 mm to fine-tune machine stops without swapping hardware.
A mechanical stop screw on the back rod sets the end position, which you lock down after commissioning. This extruded aluminum barrel omits external tie rods for a clean profile, and the -S magnet enables position detection with CMSE reed or DMSE electronic sensors.
Airtac SEJ Adjustable Cylinder SEJ63X75-30S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X75-30S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 30 mm (45–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT3/8 |
| 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, 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 30mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø63mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 1402 N |
| 0.7 MPa | 1962 N |
| Max (@1.0 MPa) | 286 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 SEJ63X75-30S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -30 | 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 SEJ63X75-30S Is Used
Press Feed Stop Calibration
Dial the retract stroke from 45 to 75 mm to perfectly match material thickness changes on a coil feed line, using the 1962 N both-way force to halt heavy stock reliably.
Packaging Changeover
Adjust the end position on the fly when switching carton sizes, letting the double rod push and pull equal 1402 N loads at 0.5 MPa without re-mounting actuators.
Welding Head Positioning
Set a precise 45 mm retract to clear a fixture, then lock the back-rod stop screw. The 286 kgf maximum capacity handles heavy tooling with stable both-way motion.
Is the Airtac SEJ Adjustable Cylinder SEJ63X75-30S the Right Cylinder?
Confirm this 30 mm adjustment window covers your positioning range. If you need less force, the 50 mm bore delivers 825 N both ways at 0.5 MPa; if you need more, step up to the 80 mm bore for 2268 N. If the exact stroke never varies in production, a fixed-stroke SED saves complexity.
The standard SEJ63X75-30S does not hold position on air loss; the adjustable air cushion only decelerates the load near stroke end. For fail-safe holding, use an external rod lock. As a dimensionally interchangeable ISO 15552 replacement, match the 63 mm bore, 75 mm stroke, PT3/8 port, and your mounting choice from Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (30mm) 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 30mm 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 SEJ63X75-30S FAQ
A stop screw on the rear rod mechanically shortens the retract stroke over a 30 mm window. For the SEJ63X75-30S, you can adjust the effective stroke anywhere from 45 mm up to the nominal 75 mm, then lock the screw in place.
Because it is a double-rod cylinder, force is identical in both directions. It generates 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and a maximum of 286 kgf at 1.0 MPa.
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