Airtac SEJ Adjustable Cylinder SEJ80X75-30
The AirTAC Airtac SEJ Adjustable Cylinder SEJ80X75-30 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 Ø80mm unit covers an effective stroke of 45–75mm without changing cylinders. Force is equal in both directions.
- BoreØ80 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 SEJ80X75-30
The AirTAC SEJ80X75-30 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 thrust is equal in both directions at 2268 N at 0.5 MPa. You can dial the retract end from 45 mm up to 75 mm to hit an exact machine stop.
A stop screw on the back rod mechanically shortens the retract stroke, letting you fine-tune the end position during commissioning without swapping hardware. The extruded aluminum barrel has no external tie rods, and field-adjustable air cushions at both ends decelerate the 25 mm rod near stroke end. This SKU has no magnet, so it does not support position sensing.
Airtac SEJ Adjustable Cylinder SEJ80X75-30 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ80X75-30 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 30 mm (45–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT3/8 |
| 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 30mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø80mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 2268 N |
| 0.7 MPa | 3175 N |
| Max (@1.0 MPa) | 463 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 SEJ80X75-30
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 80 | 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 SEJ80X75-30 Is Used
Press Die Changeover
Dial the 30 mm retract window to raise or lower a 80 mm press bed, using the equal 2268 N both-way force to lift die plates of varying heights.
Variable Stop Clamping
Tune the end position on a machining fixture to clamp parts of different widths, locking the back-rod stop screw precisely at the required 45-75 mm travel.
Diverter Gate Commissioning
Fine-tune the swing of a conveyor sorting gate during setup, adjusting the mechanical end without repositioning the cylinder's ISO 15552 mounting brackets.
Is the Airtac SEJ Adjustable Cylinder SEJ80X75-30 the Right Cylinder?
Confirm the 30 mm adjustment window covers your required end-position range. If you need less force, the adjacent 63 mm bore delivers 1402 N at 0.5 MPa both ways; if you need more, the 100 mm bore provides 3681 N at 0.5 MPa. If the stroke never varies, a fixed-stroke SED cylinder is enough.
For drop-in ISO 15552 replacement, match the 80 mm bore, 75 mm stroke, 30 mm window, PT3/8 port, and mounting choice from Basic, FA, LB, TC, FTC, TCM1, or TCM2. The adjustable air cushion decelerates motion but is not a lock; a plain SEJ will not hold position on air loss, so use an external rod lock for fail-safe holding.
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 SEJ80X75-30 FAQ
The 30 mm adjustment window lets you mechanically dial the retract stroke from a 45 mm minimum up to the 75 mm nominal stroke. You set the exact end position via a stop screw on the back rod, then lock it in place.
Because the rod exits both ends, force is identical in both directions: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and a maximum of 463 kgf at 1.0 MPa.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SEJ Cylinders
Request a Quote for Airtac SEJ Adjustable Cylinder SEJ80X75-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.