Airtac SEJ Adjustable Cylinder SEJ80BX350-10S
The AirTAC SEJ Adjustable Cylinder SEJ80BX350-10S 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 Ø80mm unit covers an effective stroke of 340–350mm without changing cylinders. Force is equal in both directions.
- BoreØ80 mm
- Nominal stroke350 mm
- Adjust window10 mm
- Effective stroke340–350 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 SEJ80BX350-10S
The AirTAC SEJ80BX350-10S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 10 mm mechanical stroke adjustment window, yielding an effective travel range of 340 to 350 mm. Because a rod exits both ends, the annulus area is symmetrical, delivering an equal output force of 2268 N at 0.5 MPa in both extend and retract directions. The SUS304 stainless steel rods make it highly suitable for corrosion-resistant or washdown environments.
You dial in the retract end position using a stop screw on the back rod, then lock it down to perfectly match your machine stop without swapping hardware. The extruded aluminum barrel contains no external tie rods, and the -S magnet enables precise end-of-stroke detection using CMSE reed or DMSE electronic sensors. Adjustable air cushions at both ends decelerate the load near stroke end.
Airtac SEJ Adjustable Cylinder SEJ80BX350-10S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ80BX350-10S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 350 mm |
| Adjustment window | 10 mm (340–350 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 10mm 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 SEJ80BX350-10S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SEJ80BX350-10S Is Used
Stamping Press Calibration
Delivering 2268 N of both-way force at 0.5 MPa, this cylinder dials in a precise 340-350 mm retract to perfectly time the contact point on progressive stamping dies during setup.
Variable-Stop Material Handling
The 10 mm mechanical stop screw allows operators to fine-tune the end position on the fly, adapting a 350 mm transfer stroke to varying pallet sizes without reprogramming the PLC.
Washdown Diverting Gates
Featuring SUS304 stainless rods for corrosion resistance, the cylinder actuates heavy diverting flaps in food processing lines, using its equal 3175 N retract force to reliably pull gates closed against product flow.
Is the Airtac SEJ Adjustable Cylinder SEJ80BX350-10S the Right Cylinder?
Verify that this 10 mm adjustment window covers your required fine-tuning range; if you need a broader variable stop, consider a larger -NN option. If sizing force, this 80 mm bore yields 2268 N both ways at 0.5 MPa. Stepping down to a 63 mm bore drops the both-way force to 1402 N, while stepping up to a 100 mm bore increases it to 3681 N. If your application never requires end-position adjustment, a fixed-stroke SED double-rod cylinder provides the same equal-force output more simply. For exact ISO 15552 replacement matching, confirm your port size (PT3/8), mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2), and magnet requirement.
Because the nominal stroke is 350 mm, external guide rails are recommended to prevent side-loading forces from damaging the rod seals over long travel distances. Note that the adjustable air cushion and stop screw decelerate the load and set the mechanical end, but a plain SEJ does not hold position on air loss; 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 SEJ80BX350-10S FAQ
A stop screw on the rear rod mechanically limits the retract stroke. On this SEJ80BX350-10S, the 10 mm adjustment window allows you to dial the effective stroke down from 350 mm to 340 mm, which is ideal for fine-tuning an end position on the machine without changing physical hardware.
Because the double-rod design creates equal annulus areas, the output 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.
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