Airtac SEJ Adjustable Cylinder SEJ40X75-10S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ40X75-10S 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 Ø40mm unit covers an effective stroke of 65–75mm without changing cylinders. Force is equal in both directions.
- BoreØ40 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 SEJ40X75-10S
The AirTAC SEJ40X75-10S is a double-acting, double-rod ISO 15552 profile cylinder with a 10mm adjustable stroke window. You can dial the retract end from 65mm to 75mm to perfectly match a machine stop. Because a rod exits both ends, the annulus area is symmetrical, yielding an equal 528 N of force each way at 0.5 MPa.
This extruded-aluminum profile cylinder includes a magnet for CMSE reed or DMSE electronic sensors. The field-adjustable air cushion at both ends decelerates the motion near stroke end, while the back-rod stop screw lets you fine-tune the position during commissioning and lock it in place.
Airtac SEJ Adjustable Cylinder SEJ40X75-10S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ40X75-10S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 10 mm (65–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
|---|---|
| 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 (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 SEJ40X75-10S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | 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 SEJ40X75-10S Is Used
Packaging Flap Adjustment
Dial the 65-75mm retract stroke to precisely set flap folding arms, utilizing the 528N both-way force to reliably push and pull varying carton thicknesses.
Component Changeover
Quickly reposition the stop screw to adapt a pick-and-place gripper for different part heights without swapping out the entire cylinder hardware.
Machine Commissioning
Fine-tune the end-of-stroke position during initial setup to align a drilling or stamping head exactly, then lock the back-rod mechanism for repeatable cycles.
Is the Airtac SEJ Adjustable Cylinder SEJ40X75-10S the Right Cylinder?
Verify the 10mm adjustment window covers your required end-position range. If you need less push, the 32mm bore delivers 345 N both ways at 0.5 MPa; if you need more, the 50mm bore provides 825 N. If your end position never changes, a fixed-stroke SED cylinder is sufficient. For drop-out ISO 15552 replacement, match the 75mm stroke, PT1/4 port, and your mounting choice from Basic, FA, LB, TC, FTC, TCM1, or TCM2. Note: this cylinder does not hold position on air loss; use an external rod lock for fail-safe holding.
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 SEJ40X75-10S FAQ
A stop screw on the back rod lets you mechanically dial the retract stroke over a 10mm window, giving an effective stroke range of 65mm to 75mm. You set the exact end position on the machine and lock it.
Because it is a double-rod cylinder, the force is identical in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and a maximum of 108 kgf at 1.0 MPa.
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