Airtac SEJ Adjustable Cylinder SEJ32X75-20S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ32X75-20S 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 20mm window, so this Ø32mm unit covers an effective stroke of 55–75mm without changing cylinders. Force is equal in both directions.
- BoreØ32 mm
- Nominal stroke75 mm
- Adjust window20 mm
- Effective stroke55–75 mm
- Port sizePT1/8
- CushionAdjustable, 27 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 SEJ32X75-20S
The AirTAC SEJ32X75-20S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 20mm adjustable stroke window, allowing you to dial the retract end from 55mm up to 75mm. Because a rod exits both ends, the annulus area is symmetrical, delivering equal force in both directions at 345 N each way at 0.5 MPa. A rear stop screw mechanically sets the end position, which you lock down after fine-tuning the machine cycle.
This 32mm bore unit includes a magnet for CMSE reed or DMSE electronic sensors and uses PT1/8 ports. It runs at 30-800 mm/s with field-adjustable air cushions at both ends to decelerate the load near stroke end. The extruded aluminum barrel ensures ISO 15552 dimensional interchangeability without external tie rods.
Airtac SEJ Adjustable Cylinder SEJ32X75-20S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ32X75-20S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 20 mm (55–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
|---|---|
| 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, 27 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 20mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø32mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 346 N |
| 0.7 MPa | 484 N |
| Max (@1.0 MPa) | 70 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 SEJ32X75-20S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 32 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -20 | 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 SEJ32X75-20S Is Used
Packaging Flap Folding
Dial the 55-75mm retract stop to perfectly time the folding flap on varying carton heights, utilizing the 345N both-way force.
Component Changeover
Quickly reposition the mechanical end stop during product family changeovers on a conveyor sorter without swapping out the entire cylinder hardware.
Pick-and-Place Trial
Use the 20mm adjustment window to micro-trial the exact retraction depth for a delicate 32mm bore pick-and-place head before locking the stop screw.
Is the Airtac SEJ Adjustable Cylinder SEJ32X75-20S the Right Cylinder?
Confirm this 20mm adjustment window covers your required end-position range; if you need less fine-tuning, a fixed-stroke SED is sufficient. For sizing, the next bore down is 32mm (this unit, 345 N @0.5 MPa), and stepping up to a 40mm bore yields 528 N @0.5 MPa. This plain cylinder does not hold position on air loss, and the cushion is not a brake; for fail-safe holding, use an external rod lock. When matching an ISO 15552 replacement, verify the 55-75mm effective stroke, PT1/8 port, and mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (20mm) 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 20mm 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 SEJ32X75-20S FAQ
A stop screw on the back rod lets you mechanically shorten the retract stroke within a 20mm window. The effective stroke range is 55mm to 75mm, which you set and lock during commissioning.
Because it is a double-rod cylinder, force is equal both ways: 345 N at 0.5 MPa, 483 N at 0.7 MPa, and a maximum of 70 kgf at 1.0 MPa.
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